RCS RS485 thermostat

[dbemowsk]

So I did some digging and found my old code that I wrote to control my RCS TR40 thermostat when I was working with a software called Open Source Automation (OSA). The thermostat runs on an RS485 network and I just recently got my RS485 Arduino adapter. I think it may take me a little while, but I would like to port the code over to MySensors and create a MySensors RS485 gateway that will talk to the thermostat. I have some questions before I dive into this circuit though.

My first question is, with OSA, the thermostat object had some configurable properties that I would assume that I would hard code into the sketch such as the serial port (Which I am guessing won't be needed at all), and the RS485 address. Another property that I would most likely hard code would be the "Refresh Interval" which told the system how often the information would update back to the automation software.

My next question, which is possibly one that I my just have to figure out in testing, is will an Arduino Pro Mini have enough storage space for everything that I need to code in to the thermostat gateway.

My last question would be, is there any reason that I would want to store any of the data values on something like an EEPROM on the gateway itself. I would guess that everything would store in the automation software.

Anyway, here is the code that I am looking to port. I wrote it in Visual Basic.

Imports System.AddIn
Imports OpenSourceAutomation
Imports System.Timers
Imports System.IO.Ports
Imports System.Threading.Thread
Imports MySql.Data.MySqlClient

<AddIn("RCS Thermostat", Version:="0.1.2")>
Public Class RCSThermostatManager
    Implements IOpenSourceAutomationAddIn

    Structure Thermostat
        Dim OutsideAir As Integer
        Dim ZoneCode As Integer
        Dim CurrentTemp As Integer
        Dim CurrentSetpoint As Integer
        Dim CurrentSetpointHeat As Integer
        Dim CurrentSetpointCool As Integer
        Dim CurrentMode As String
        Dim CurrentFanMode As Integer
        Dim HeatStage1 As Integer
        Dim HeatStage2 As Integer
        Dim HeatStage3 As Integer
        Dim CoolStage1 As Integer
        Dim CoolStage2 As Integer
        Dim FanStatus As Integer
        Dim VentDamperStatus As Integer
        Dim ZoneDamperStatus As Integer
        Dim MOTMRT1Status As Integer
        Dim MOTMRT2Status As Integer
        Dim SystemModeStatus As String
        Dim SystemFanStatus As Integer
    End Structure
    'create the mode, fan mode, stage status and MOTMRT associations
    Dim Modes As New Dictionary(Of String, String)
    Dim FanModes As New Dictionary(Of Integer, String)
    Dim Status As New Dictionary(Of Integer, String)
    Dim MOTMRT As New Dictionary(Of Integer, String)

    Private Shared OSAEApi As New OSAE("RCS Thermostat")
    Private CN As MySqlConnection
    Private Shared dsObjects As DataSet

    Private Shared Plugin As String
    Private Shared ThermostatName As String
    Private Shared ThisObject As String
    Private Shared COMPort As String
    Private Shared SerialAddr As String
    Private Shared ControllerPort As SerialPort
    Private Shared ReceivedMessage As String
    Private Shared ReceiveTime As DateTime
    Private Shared LastSent As String
    Private Shared Tstat As New Thermostat

    Private Shared TstatTimer As New System.Timers.Timer
    Private Shared Refresh As Double
    Private Shared BusyFlag As Boolean

    Public Sub RunInterface(ByVal pluginName As String) Implements OpenSourceAutomation.IOpenSourceAutomationAddIn.RunInterface

        Try
            OSAEApi.AddToLog("Initializing plugin: " & pluginName, True)
            Plugin = pluginName
            ThermostatName = Plugin

            'Create the associative arrays for mode, fan mode, status and MOTMRT
            Modes.Add("O", "Off")
            Modes.Add("H", "Heat")
            Modes.Add("C", "Cool")
            Modes.Add("A", "Auto")
            Modes.Add("EH", "Emergency Heat")
            Modes.Add("I", "Invalid")
            FanModes.Add(0, "Auto")
            FanModes.Add(1, "On")
            Status.Add(0, "Off")
            Status.Add(1, "On")
            MOTMRT.Add(0, "Off")
            MOTMRT.Add(1, "MOT")
            MOTMRT.Add(2, "MRT")

            DBConnect()
            LoadObjects()

            'Define an event based timer to refresh the thermostat reading every 
            'number of seconds based on the "Refresh Interval" value
            If Not Double.TryParse(GetProperty("Refresh Interval"), Refresh) Then
                Refresh = 20
            End If
            Try
                TstatTimer.Interval = Refresh * 1000
                TstatTimer.AutoReset = True
                AddHandler TstatTimer.Elapsed, AddressOf TstatTimer_Elapsed
                TstatTimer.Start()

            Catch ex As Exception
                OSAEApi.AddToLog("Error setting up timer: " & ex.Message, True)
            End Try
        Catch ex As Exception
            OSAEApi.AddToLog("Error setting up plugin: " & ex.Message, True)
        End Try

    End Sub

    Public Sub ProcessCommand(ByVal CommandTable As System.Data.DataTable) Implements OpenSourceAutomation.IOpenSourceAutomationAddIn.ProcessCommand
        Dim Mode As String
        Dim Parameter1 As String

        Try
            For Each row In CommandTable.Rows
                'Get the object that we are processing
                ThermostatName = row("object_name").ToString
                SetComPort()

                'Get the first parameter value for use on heating and cooling
                'set points and setting the thermostat mode

                Parameter1 = row("parameter_1")
                Select Case row("method_name").ToString
                    Case "GETSTATS"
                        Send("R=1")

                    Case "TEMPUP"
                        OSAEApi.EventLogAdd(ThermostatName, "TEMPCHANGE")
                        OSAEApi.AddToLog("Increasing temp set point", False)
                        Send("SP+ R=1")

                    Case "TEMPDOWN"
                        OSAEApi.EventLogAdd(ThermostatName, "TEMPCHANGE")
                        OSAEApi.AddToLog("Decreasing temp set point", False)
                        Send("SP- R=1")

                    Case "SETHEATSP"
                        OSAEApi.EventLogAdd(ThermostatName, "HEATSPCHANGE")
                        OSAEApi.AddToLog("Setting heating set point to " & Parameter1, False)
                        Send("SPH=" & Parameter1 & " R=1")

                    Case "SETCOOLSP"
                        OSAEApi.EventLogAdd(ThermostatName, "COOLSPCHANGE")
                        OSAEApi.AddToLog("Setting cooling set point to " & Parameter1, False)
                        Send("SPC=" & Parameter1 & " R=1")

                    Case "SETMODE"
                        OSAEApi.EventLogAdd(ThermostatName, "MODECHANGE")
                        Mode = Tstat.CurrentMode
                        OSAEApi.AddToLog("Changing mode from " & Modes(Mode) & " to " & Parameter1, False)
                        Send("M=" & Parameter1 & " R=1")

                    Case "FANON"
                        OSAEApi.EventLogAdd(ThermostatName, "FANON")
                        OSAEApi.AddToLog("Turning fan on", False)
                        Send("F=1 R=1")

                    Case "FANOFF"
                        OSAEApi.EventLogAdd(ThermostatName, "FANOFF")
                        Mode = If(Tstat.CurrentFanMode = 0, 1, 0)
                        OSAEApi.AddToLog("Turning fan off", False)
                        Send("F=0 R=1")

                    Case "TOGGLEFANMODE"
                        OSAEApi.EventLogAdd(ThermostatName, "FANMODECHANGE")
                        Mode = If(Tstat.CurrentFanMode = 0, 1, 0)
                        OSAEApi.AddToLog("Changing mode from " & Status(Tstat.CurrentFanMode) & " to " & Status(Mode), False)
                        Send("F=" & Mode & " R=1")

                    Case "ON"
                        OSAEApi.AddToLog("Starting thermostat automatic updates", False)
                        TstatTimer.Start()

                    Case "OFF"
                        OSAEApi.AddToLog("Stopping thermostat automatic updates", False)
                        TstatTimer.Stop()
                End Select
            Next
        Catch ex As Exception
            OSAEApi.AddToLog("Error Processing Command: " & ex.Message, True)
        End Try

    End Sub

    Public Sub Shutdown() Implements OpenSourceAutomation.IOpenSourceAutomationAddIn.Shutdown
        OSAEApi.AddToLog("Shutting down plugin", True)
        ControllerPort.Close()
        OSAEApi.AddToLog("Finished shutting down plugin", True)
    End Sub

    Public Sub SetComPort()
        Dim Port As String
        Try
            Port = GetProperty("COM Port")
            'Check the port that we are currently working with and change it 
            'if it Is different
            If COMPort <> "COM" + Port Then
                COMPort = "COM" + Port

                ControllerPort = New SerialPort(COMPort, 9600, Parity.None, 8, StopBits.One)
                OSAEApi.AddToLog("Port is set to: " & COMPort, True)
                ControllerPort.NewLine = vbCrLf
                ControllerPort.ReadTimeout = 5

                ControllerPort.Open()
            End If
            'Get the RS-485 address
            SerialAddr = GetProperty("Serial Address")

            'To prevent double subscribing we'll first disassociate the event handler and then re-add it
            RemoveHandler ControllerPort.DataReceived, AddressOf UpdateReceived
            AddHandler ControllerPort.DataReceived, New SerialDataReceivedEventHandler(AddressOf UpdateReceived)

        Catch ex As Exception
            OSAEApi.AddToLog("Error setting com port: " & ex.Message, True)
        End Try

    End Sub

    Public Sub DBConnect()
        CN = New MySqlConnection
        CN.ConnectionString = "server=" & OSAEApi.DBConnection & ";Port=" & OSAEApi.DBPort & ";Database=" & OSAEApi.DBName & ";Password=" & OSAEApi.DBPassword & ";use procedure bodies=false;Persist Security Info=True;User ID=" & OSAEApi.DBUsername
        Try
            CN.Open()
            CN.Close()
            OSAEApi.AddToLog("Connected to Database: " & OSAEApi.DBName & " @ " & OSAEApi.DBConnection & ":" & OSAEApi.DBPort, True)
        Catch ex As Exception
            OSAEApi.AddToLog("Error Connecting to Database: " & ex.Message, True)
        End Try
    End Sub

    Private Sub LoadObjects()
        Dim CMD As New MySqlCommand

        Try
            'Connect to the database and find any RCS_THERMOSTAT object types so
            'they can all be automatically updated.
            CMD.Connection = CN
            CMD.CommandType = CommandType.Text
            CMD.CommandText = "SELECT object_name FROM osae_v_object WHERE object_type='RCS-TR40 THERMOSTAT'"
            dsObjects = OSAEApi.RunQuery(CMD)

            For Each Row As DataRow In dsObjects.Tables(0).Rows
                OSAEApi.AddToLog("Found object: " & Row("object_name").ToString, True)
            Next

        Catch ex As Exception
            OSAEApi.AddToLog("Error loading objects: " & ex.Message, True)
        End Try

    End Sub

    Private Sub TstatTimer_Elapsed(ByVal sender As Object, ByVal e As System.Timers.ElapsedEventArgs)
        For Each Row As DataRow In dsObjects.Tables(0).Rows
            'get the name of the object we are working on
            ThermostatName = Row("object_name").ToString

            'Make sure we are on the correct com port and RS-485 address for this object
            SetComPort()

            'Send the First status call to the thermostat
            Send("R=1")

            'Wait here while we process the first command
            Sleep(2000)

            'Send the second status call to the thermostat
            Send("R=2")
        Next
    End Sub

    Protected Sub UpdateReceived(ByVal sender As Object, ByVal e As SerialDataReceivedEventArgs)
        OSAEApi.AddToLog("Running serial port event handler", False)
        ProcessReceived()

    End Sub

    Protected Sub ProcessReceived()
        Dim Message As String
        Dim CrIndex As Integer

        Try
            Message = ControllerPort.ReadExisting()
            OSAEApi.AddToLog("Serial data received: " & Message.TrimEnd, True)

            If Message.Length > 0 Then
                ReceivedMessage += Message
                While True
                    CrIndex = ReceivedMessage.IndexOf(vbCr)
                    If CrIndex > -1 Then
                        ReceiveTime = Now()
                        ParseReceived(Left(ReceivedMessage, CrIndex))
                        ReceivedMessage = Mid(ReceivedMessage, CrIndex + 3)
                    Else
                        Exit While
                    End If
                End While
            End If

            'Clear the BusyFlag
            BusyFlag = False
        Catch ex As Exception
            OSAEApi.AddToLog("Error receiving on com port: " & ex.Message, True)
        End Try

    End Sub

    Protected Sub ParseReceived(ByVal Message As String)
        Dim StatusData() As String
        Dim Count As Integer
        Dim StatusString As String
        Dim Status() As String
        Dim Type As String
        Dim Value As String

        Try
            OSAEApi.AddToLog("Processing: " & Message, True)
            SetProperty("Received", Message)

            'Split the status message into parts
            StatusData = Message.Split(" ")

            If StatusData(0).StartsWith("A=") Then
                'Loop through each status data string and process it
                Count = 0
                While Count < StatusData.Length - 1
                    StatusString = StatusData(Count)
                    Status = StatusString.Split("=")
                    Type = Status(0)
                    Value = Status(1)
                    ParseStatus(Type, Value)
                    Count = Count + 1
                End While
            Else
                'The received response was not formatted properly.  Re-send the command
                OSAEApi.AddToLog("re-sending command: " & LastSent, False)
                Send(LastSent)
            End If
        Catch ex As Exception
            OSAEApi.AddToLog("Error parsing received message: " & ex.Message, True)
        End Try

    End Sub

    Protected Sub ParseStatus(ByVal Type As String, ByVal Value As String)
        Dim stg1 As Integer
        Dim stg2 As Integer
        'Process each kind of status type
        Try
            Select Case Type
                'Type 1 status message types
                Case "OA"
                    'OSAEApi.AddToLog("Outside air reading: " & Value, True)
                    Tstat.OutsideAir = Value
                    SetProperty("Outside Air", Value)
                Case "Z"
                    'OSAEApi.AddToLog("Reading for zone: " & Value, True)
                    Tstat.ZoneCode = Value
                    SetProperty("Zone", Value)
                Case "T"
                    'OSAEApi.AddToLog("Temperature reading: " & Value, True)
                    Tstat.CurrentTemp = Value
                    SetProperty("Temperature", Value)
                Case "SP"
                    'OSAEApi.AddToLog("Set point: " & Value, True)
                    Tstat.CurrentSetpoint = Value
                    SetProperty("Set Point", Value)
                Case "SPH"
                    'OSAEApi.AddToLog("Heat set point: " & Value, True)
                    Tstat.CurrentSetpointHeat = Value
                    SetProperty("Set Point Heat", Value)
                Case "SPC"
                    'OSAEApi.AddToLog("Cold set point: " & Value, True)
                    Tstat.CurrentSetpointCool = Value
                    SetProperty("Set Point Cool", Value)
                Case "M"
                    'OSAEApi.AddToLog("Mode: " & Value, True)
                    Tstat.CurrentMode = Value
                    SetProperty("Mode", Modes(Value))
                Case "FM"
                    'OSAEApi.AddToLog("Fan mode: " & Value, True)
                    Tstat.CurrentFanMode = Value
                    SetProperty("Fan Mode", FanModes(Value))
                    'Type 2 status message types
                Case "H1A"
                    'OSAEApi.AddToLog("Heat stage 1: " & Value, True)
                    If Tstat.HeatStage1 <> Value Then
                        OSAEApi.EventLogAdd(ThermostatName, "STATUSCHANGE")
                    End If
                    Tstat.HeatStage1 = Value
                    SetProperty("Heat Stage 1", Status(Value))
                Case "H2A"
                    'OSAEApi.AddToLog("Heat stage 2: " & Value, True)
                    If Tstat.HeatStage2 <> Value Then
                        OSAEApi.EventLogAdd(ThermostatName, "STATUSCHANGE")
                    End If
                    Tstat.HeatStage2 = Value
                    SetProperty("Heat Stage 2", Status(Value))
                Case "H3A"
                    'OSAEApi.AddToLog("Heat stage 3: " & Value, True)
                    If Tstat.HeatStage1 <> Value Then
                        OSAEApi.EventLogAdd(ThermostatName, "STATUSCHANGE")
                    End If
                    Tstat.HeatStage3 = Value
                    SetProperty("Heat Stage 3", Status(Value))
                Case "C1A"
                    'OSAEApi.AddToLog("Cool stage 1: " & Value, True)
                    If Tstat.CoolStage1 <> Value Then
                        OSAEApi.EventLogAdd(ThermostatName, "STATUSCHANGE")
                    End If
                    Tstat.CoolStage1 = Value
                    SetProperty("Cool Stage 1", Status(Value))
                Case "C2A"
                    'OSAEApi.AddToLog("Cool stage 2: " & Value, True)
                    If Tstat.CoolStage2 <> Value Then
                        OSAEApi.EventLogAdd(ThermostatName, "STATUSCHANGE")
                    End If
                    Tstat.CoolStage2 = Value
                    SetProperty("Cool Stage 2", Status(Value))
                Case "FA"
                    'OSAEApi.AddToLog("Fan status: " & Value, True)
                    If Tstat.CoolStage2 <> Value Then
                        OSAEApi.EventLogAdd(ThermostatName, "FANMODECHANGE")
                    End If
                    Tstat.FanStatus = Value
                    SetProperty("Fan Status", FanModes(Value))
                Case "VA"
                    'OSAEApi.AddToLog("Vent damper: " & Value, True)
                    Tstat.VentDamperStatus = Value
                    SetProperty("Vent Damper", Status(Value))
                Case "D1"
                    'OSAEApi.AddToLog("Zone damper: " & Value, True)
                    Tstat.ZoneDamperStatus = Value
                    SetProperty("Zone Damper", Status(Value))
                Case "SCP"
                    stg1 = Left(Value, 1)
                    stg2 = Right(Value, 1)

                    'OSAEApi.AddToLog("MOT/MRT stage 1: " & stg1, True)
                    Tstat.MOTMRT1Status = stg1
                    SetProperty("MOTMRT1", MOTMRT(stg1))

                    'OSAEApi.AddToLog("MOT/MRT stage 2: " & stg2, True)
                    Tstat.MOTMRT2Status = stg2
                    SetProperty("MOTMRT2", MOTMRT(stg2))
                Case "SM"
                    'OSAEApi.AddToLog("System mode: " & Value, True)
                    Tstat.SystemModeStatus = Value
                    SetProperty("System Mode", Modes(Value))
                Case "SF"
                    'OSAEApi.AddToLog("System fan: " & Value, True)
                    Tstat.SystemFanStatus = Value
                    SetProperty("System Fan", Status(Value))
            End Select
        Catch ex As Exception
            OSAEApi.AddToLog("Error parsing status data: " & ex.Message, True)
        End Try
    End Sub

    Private Sub Send(ByVal Cmd As String)
        Dim Command As String = "A=" & SerialAddr & " O=00 " & Cmd
        Try
            OSAEApi.AddToLog("Writing to serial port " & COMPort & ": " & Command, False)
            ControllerPort.Write(Command & vbCr)
            LastSent = Cmd
        Catch
            OSAEApi.AddToLog("Error sending command to serial port " & COMPort & ": " & Command, False)
        End Try
    End Sub

    Private Sub SetProperty(ByVal PropertyName As String, ByVal Data As String)
        Try
            OSAEApi.ObjectPropertySet(ThermostatName, PropertyName, Data)
        Catch ex As Exception
            OSAEApi.AddToLog("Error setting property value: " & ex.Message, True)
        End Try
    End Sub

    Private Function GetProperty(ByVal PropertyName As String) As String
        Dim val As String = ""
        Try
            val = OSAEApi.GetObjectPropertyValue(ThermostatName, PropertyName).Value()
            'OSAEApi.AddToLog("Fetched value: [" & val & "] from object [" & ThermostatName & "] and from property name[" & PropertyName & "]", False)
        Catch ex As Exception
            OSAEApi.AddToLog("Error getting property value: " & ex.Message, True)
        End Try
        Return val
    End Function

End Class

[dbemowsk]

So I have been working on my RS485 gateway/bridge for my RCS thermostat. I have the code set up no so that commands sent from the thermostat will update Domoticz, but I ran into a snag that I cannot figure out. Here is the code I have so far. Still a bit rough.

 /*
  RCS Thermostat for MySensors

  Arduino RCS RS485 thermostat control

  July 7,2016

  This is a gateway bridge to allow an RCS serial thermostat to be
accessible to a MySensors
  gateway.  The thermostat being used to test this is an RCS TR40 RS485
thermostat.  The published
  protocol for RCS thermostats can be found at the following address;
  http://www.rcstechnology.com/oldsite/docs/thermostats/serial/SERIAL%20PROTOCOL%20REV%204.3%20%20150-00225-43.pdf

  This sketch features the following:

  Add features here
 */

// Import needed libraries
#include <MySensor.h>
#include <SPI.h>
#include <SoftwareSerial.h>

#define SKETCH_NAME "RCS Thermostat"
#define SKETCH_VERSION "1.0"

#define CHILD_ID_TEMP          0 // V_TEMP
#define CHILD_ID_STATUS        1 // V_STATUS
#define CHILD_ID_SETPOINT_COOL 2 // V_HVAC_SETPOINT_COOL
#define CHILD_ID_SETPOINT_HEAT 3 // V_HVAC_SETPOINT_HEAT
#define CHILD_ID_FLOW_STATE    4 // V_HVAC_FLOW_STATE
#define CHILD_ID_FLOW_MODE     5 // V_HVAC_FLOW_MODE
#define CHILD_ID_HVAC_SPEED    6 // V_HVAC_SPEED

// Declare Constants and Pin Numbers
#define SSerialRX        5  //Serial Receive pin 8
#define SSerialTX        3  //Serial Transmit pin 7

#define SSerialTxControl 4  //RS485 Direction control

#define RS485Transmit    HIGH
#define RS485Receive     LOW

#define Pin12LED         12
#define Pin13LED         13

// Declare objects
SoftwareSerial RS485Serial(SSerialRX, SSerialTX); // RX, TX

MySensor gw;

// Sensor values
// V_TEMP, V_STATUS, V_HVAC_FLOW_STATE, V_HVAC_SPEED
// V_HVAC_SETPOINT_COOL, V_HVAC_SETPOINT_HEAT, V_HVAC_FLOW_MODE
MyMessage msgTemp( CHILD_ID_TEMP,             V_TEMP );
MyMessage msgStatus( CHILD_ID_STATUS,         V_STATUS );
MyMessage msgSetCool( CHILD_ID_SETPOINT_COOL, V_HVAC_SETPOINT_COOL );
MyMessage msgSetHeat( CHILD_ID_SETPOINT_HEAT, V_HVAC_SETPOINT_HEAT );
MyMessage msgFlowState( CHILD_ID_FLOW_STATE,  V_HVAC_FLOW_STATE );
MyMessage msgFlowMode( CHILD_ID_FLOW_MODE,    V_HVAC_FLOW_MODE );
MyMessage msgHvacSpeed( CHILD_ID_HVAC_SPEED,  V_HVAC_SPEED );


// Sensor sub-type
// S_HVAC

// Declare Variables
int byteReceived;
int byteSend;
String rcvString;
String sndString;
//This is for storing the last command that was sent
String lastSent;
//the last sent set point
String setPoint;

String mode;
//This is the RS485 address of this node that gets sent to the thermostat
String serialAddr = "1";
//Placeholder for the last command sent
String LastSent = "";


void setup() {
  Serial.begin(9600);

  gw.begin( incomingMessage, AUTO, true );

  gw.sendSketchInfo( SKETCH_NAME, SKETCH_VERSION );

  // Register the thermostat with the gateway
  gw.present( CHILD_ID_TEMP,          S_HVAC );
  gw.present( CHILD_ID_STATUS,        S_HVAC );
  gw.present( CHILD_ID_SETPOINT_COOL, S_HVAC );
  gw.present( CHILD_ID_SETPOINT_HEAT, S_HVAC );
  gw.present( CHILD_ID_FLOW_STATE,    S_HVAC );
  gw.present( CHILD_ID_FLOW_MODE,     S_HVAC );

  // put your setup code here, to run once:
  pinMode(SSerialTxControl, OUTPUT);

  digitalWrite(SSerialTxControl, RS485Receive);  // Init Transceiver

  // Start the software serial port, to another device
  RS485Serial.begin(9600);   // set the data rate

} //End setup

void loop() {
  String dataIn;
  if (RS485Serial.available()) {
    dataIn = RS485Serial.readStringUntil('\n');
    ParseReceived(dataIn);
  }
} //End loop

void ParseReceived(String Message) {
  String StatusData;
  //int Count;
  String StatusString;
  String Status;
  String Type;
  String Value;

  int Index;
  int Start;
  int End;
  int StatIndex;

  Index = Message.indexOf(' ');
  Start = 0;

  Serial.println("Message: " + Message);

  if (Message.startsWith("A=")) {
    do {
      End =(Index == -1) ? Message.length() : Index;
      //Get the status string to process
      StatusString = Message.substring(Start, End);
      //Change our start position to 1 over the last space found
      Start = Index + 1;
      //Find the end of the next status string
      Index = Message.indexOf(' ', Start);

      //Now we need to process the status string into it's Type and Value
      StatIndex = StatusString.indexOf('=');
      Type = StatusString.substring(0, StatIndex);
      Value = StatusString.substring(StatIndex + 1);
      ParseStatus(Type, Value);
    } while (Index != -1);
  } else {
    SendCmd(LastSent);
  }
} //End ParseReceived

void ParseStatus(String Type, String Value) {
  //int stg1;
  //int stg2;

  //Serial.write("Type = " + Type + " : Value = " + Value + "\r\n");
  //Process each kind of status type

  if (Type == "OA") {
      //Outside Air not used
  } else if (Type == "Z") {
      //Zone not used
  } else if (Type == "T") {
      //logging.AddToLog("Temperature reading: " & Value, True)
      gw.send(msgTemp.set(Value.toInt()));
  } else if (Type == "SP") {
      //logging.AddToLog("Set point: " & Value, True)
      Serial.println("Set point: " + Value);
      gw.send(msgSetCool.set(Value.toInt()));
  } else if (Type == "SPH") {
      //logging.AddToLog("Heat set point: " & Value, True)
      Serial.println("Heat set point: " + Value);
      gw.send(msgSetHeat.set(Value.toInt)));
  } else if (Type == "SPC") {
      //logging.AddToLog("Cold set point: " & Value, True)
      Serial.println("Cold set point: " + Value);
      gw.send(msgSetCool.set(Value.toInt()));
  } else if (Type == "M") {
      //logging.AddToLog("Mode: " & Value, True)
      Serial.println("Mode: " + Value);
      gw.send(msgFlowMode.set(Value.c_str()));
  } else if (Type == "FM") {
      //logging.AddToLog("Fan mode: " & Value, True)
      Serial.println("Fan mode: " + Value);
      gw.send(msgFlowMode.set(Value.c_str()));
    //Type 2 status message types
  } else if (Type == "H1A") {
      //logging.AddToLog("Heat stage 1: " & Value, True)
      Serial.println("Heat stage 1: " + Value);
      gw.send(msgHvacSpeed.set("Min"));
  } else if (Type == "H2A") {
      //logging.AddToLog("Heat stage 2: " & Value, True)
      Serial.println("Heat stage 2: " + Value);
      gw.send(msgHvacSpeed.set("Normal"));
  } else if (Type == "H3A") {
      //logging.AddToLog("Heat stage 3: " & Value, True)
      Serial.println("Heat stage 3: " + Value);
      gw.send(msgHvacSpeed.set("Max"));
  } else if (Type == "C1A") {
      //logging.AddToLog("Cool stage 1: " & Value, True)
      Serial.println("Cool stage 1: " + Value);
      gw.send(msgHvacSpeed.set("Min"));
  } else if (Type == "C2A") {
      //logging.AddToLog("Cool stage 2: " & Value, True)
      Serial.println("Cool stage 2: " + Value);
      gw.send(msgHvacSpeed.set("Normal"));
  } else if (Type == "FA") {
      //logging.AddToLog("Fan status: " & Value, True)
      Serial.println("Mode: " + Value);
      gw.send(msgFlowMode.set("Normal"));
  } else if (Type == "VA") {
      //logging.AddToLog("Vent damper: " & Value, True)
      //Vent damper not used
  } else if (Type == "D1") {
      //logging.AddToLog("Zone damper: " & Value, True)
      //Damper #1 not used
  } else if (Type == "SCP") {
      //stg1 = Value.substring(0, 1)
      //stg2 = Value.substring(0, -1)

      //logging.AddToLog("MOT/MRT stage 1: " & stg1, True)
      //Deal with minimum off time and minimum run times
      //for stage 1

      //logging.AddToLog("MOT/MRT stage 2: " & stg2, True)
      //Deal with minimum off time and minimum run times
      //for stage 2
  } else if (Type == "SM") {
      //logging.AddToLog("System mode: " & Value, True)
      String FlowState;

      if (Value == "O") {
        FlowState = "Off";
      } else if (Value == "H") {
        FlowState = "HeatOn";
      } else if (Value == "C") {
        FlowState = "CoolOn";
      } else {
        FlowState = "AutoChangeOver";
      }
      Serial.println("Flow state: " + FlowState);
      gw.send(msgFlowState.set(FlowState.c_str()));
  } else if (Type == "SF") {
      //logging.AddToLog("System fan: " & Value, True)
      Serial.println("System fan : " + Value);
      gw.send(msgStatus.set(Value.toInt()));
  }
} //End ParseStatus

void SendCmd(String cmd) {
  String commandStr;
  commandStr = "A=" + serialAddr + " O=00 " + cmd;

  //DEBUG_PRINTLN("Writing to serial port: " + Command);

  // Enable RS485 Transmit only for the duration of the send
  digitalWrite(SSerialTxControl, RS485Transmit);
  RS485Serial.print(commandStr + "\r");
  LastSent = cmd;
  //Return to RS485 receive mode
  digitalWrite(SSerialTxControl, RS485Receive);
} //End SendCmd

void SetProperty(String PropertyName, String Data) {
  //
  PropertyName = "";
  Data = "";
} //End SendCmd

void incomingMessage(const MyMessage &message) {
  Serial.println(message.type);
  // We only expect one type of message from controller. But we better
check anyway.
  if (message.isAck()) {
     Serial.println("This is an ack from gateway");
  }

  if (message.type == V_HVAC_SETPOINT_COOL) {
     Serial.println("Message received");
     setPoint = String(message.data).toInt();
     Serial.println("New Set Temp is : " + String(setPoint));
     SendCmd("SPC=" + setPoint + " R=1");

     // Write some debug info
     Serial.print("Incoming change for sensor:");
     Serial.print(message.sensor);
     Serial.print(", New status: ");
     Serial.println(message.data);
  }

  if (message.type == V_HVAC_SETPOINT_HEAT) {
     Serial.println("Message received");
     setPoint = String(message.data).toInt();
     Serial.println("New Set Temp is : " + String(setPoint));
     SendCmd("SPH=" + setPoint + " R=1");

     // Write some debug info
     Serial.print("Incoming change for sensor:");
     Serial.print(message.sensor);
     Serial.print(", New status: ");
     Serial.println(message.data);
  }
} //End incomingMessage

The problem I have is that I am trying to send a decimal or float number for my temp value and I cannot figure out how. In the code, there is the ParseStatus function which takes a Type and Value as it's arguments. For types like "SP" , "SPH", "SPC", etc... I have it converting the value to an integer ( Value.toInt() ) which works. But if I try to convert it to a floating point decimal ( Value.toFloat() ), I get an error:

C:\Users\dbemowsk\Documents\Arduino\RCS_RS485_Thermostat\RCS_RS485_Thermostat.ino:
In function 'void ParseStatus(String, String)':

RCS_RS485_Thermostat:176: error: call of overloaded 'set(float)' is ambiguous

       gw.send(msgSetHeat.set(Value.toFloat()));

                                             ^

C:\Users\dbemowsk\Documents\Arduino\RCS_RS485_Thermostat\RCS_RS485_Thermostat.ino:176:45:
note: candidates are:

In file included from C:\Program Files
(x86)\Arduino\libraries\MySensors/MyParser.h:23:0,

                 from C:\Program Files
(x86)\Arduino\libraries\MySensors/MySensor.h:29,

                 from
C:\Users\dbemowsk\Documents\Arduino\RCS_RS485_Thermostat\RCS_RS485_Thermostat.ino:19:

C:\Program Files (x86)\Arduino\libraries\MySensors/MyMessage.h:262:13:
note: MyMessage& MyMessage::set(uint8_t)

  MyMessage& set(uint8_t value);

             ^

C:\Program Files (x86)\Arduino\libraries\MySensors/MyMessage.h:264:13:
note: MyMessage& MyMessage::set(long unsigned int)

  MyMessage& set(unsigned long value);

             ^

C:\Program Files (x86)\Arduino\libraries\MySensors/MyMessage.h:265:13:
note: MyMessage& MyMessage::set(long int)

  MyMessage& set(long value);

             ^

C:\Program Files (x86)\Arduino\libraries\MySensors/MyMessage.h:266:13:
note: MyMessage& MyMessage::set(unsigned int)

  MyMessage& set(unsigned int value);

             ^

C:\Program Files (x86)\Arduino\libraries\MySensors/MyMessage.h:267:13:
note: MyMessage& MyMessage::set(int)

  MyMessage& set(int value);

             ^

exit status 1
call of overloaded 'set(float)' is ambiguous

Is it possible to send decimal numbers?

The next issue is that when I send values for the heat or cool set points, I have to send them as metric Celsius values. When I send them in Farenheit the number shown in Dompticz is WAY too high. That I am sure is a setting somewhere in Domoticz, but I haven't found it yet.

The last thing is that when I send an "SPC" or Set Point Cool value, Domoticz shows a value of 190.2 and it doesn't change if I send another value. I looked over the code and I am not seeing anything that looks to be wrong (other than the floating point number issue).

[mfalkvidd]

@dbemowsk try

gw.send(msgSetHeat.set(Value.toFloat(),1));

I think that will do the conversion with 1 decimal.

As for the fareheit setting, it is at Settings->Meters/counters

[dbemowsk]

@mfalkvidd said:

As for the fareheit setting, it is at Settings->Meters/counters

I have the temperature setting to display Fahrenheit, but when I send a value in Fahrenheit from the MySensors bridge, it displays a lot higher value. If I send the value in Celsius, it displays the correct Fahrenheit value. So the setting under Meters/Counters seems to ONLY tell the system to convert the stored value from Celsius to Fahrenheit prior to display. I will just add a function to do the conversion in my thermostat bridge sketch prior to sending it to the gateway.

The other problem as I mentioned is that Domoticz is not seeing the incoming V_HVAC_SETPOINT_COOL. I send different values and it displays 190.4 every time (I said 190.2 last time, but it's 190.4). Is there something that I am doing wrong, or is this a limitation in Domoticz?

[pjr]

@dbemowsk said:

The other problem as I mentioned is that Domoticz is not seeing the incoming V_HVAC_SETPOINT_COOL. I send different values and it displays 190.4 every time (I said 190.2 last time, but it's 190.4). Is there something that I am doing wrong, or is this a limitation in Domoticz?

Works for me Although I'm using celsius scale in my setup.. One direfference we have. I have only one S_HVAC child defined and in my setup it sends ON/OFF state, V_HVAC_SETPOINT_HEAT, V_HVAC_SETPOINT_COOL and V_TEMP -messges. Domoticz registers these separate node-child-sub-devices when it gots first messages from them. But I think this shouldnt be an issue..

[dbemowsk]

@pjr said:

I have only one S_HVAC child defined and in my setup it sends ON/OFF state, V_HVAC_SETPOINT_HEAT, V_HVAC_SETPOINT_COOL and V_TEMP -messges.

I have a few questions regarding your setup.

• First, what type of thermostat do you run?
• How are you MySensorizing your thermostat?
• Does your thermostat have a single set point, or does it have separate heating and cooling set points?
• When you set your temp at the thermostat itself, be it the heating or cooling set point, does it report that back to your gateway/Domoticz. If so, How do you have your code set to report that back?

Could I possibly see how you have your code set up to compare what I have? I am thinking that it is something in the way that I am reporting back to the gateway. My MySensors bridge that I am building just translates what my thermostat sends for data on the RS485 network and converts that to the MySensors standard that should work with Domoticz. I just can't seem to figure out what I am doing wrong with the cooling set point. Sending the temp and the heating set point values works perfect, just not the cooling set point.

[dbemowsk]

@mfalkvidd said:

try

gw.send(msgSetHeat.set(Value.toFloat(),1));

@mfalkvidd Forgot to say thanks for that tip. That worked.

[pjr]

@dbemowsk said:

@pjr said:

I have only one S_HVAC child defined and in my setup it sends ON/OFF state, V_HVAC_SETPOINT_HEAT, V_HVAC_SETPOINT_COOL and V_TEMP -messges.

I have a few questions regarding your setup.

• First, what type of thermostat do you run?

So the node integrates my Amitime air source heat pump to domoticz.

gw.present(2, S_HVAC);

• How are you MySensorizing your thermostat?

Its not actually thermostat. Its heat pump. Same way as thermostat is has set point heat, cool and current temp readings.

• Does your thermostat have a single set point, or does it have separate heating and cooling set points?

It has both

• When you set your temp at the thermostat itself, be it the heating or cooling set point, does it report that back to your gateway/Domoticz. If so, How do you have your code set to report that back?

Yes it report back.

Could I possibly see how you have your code set up to compare what I have? I am thinking that it is something in the way that I am reporting back to the gateway. My MySensors bridge that I am building just translates what my thermostat sends for data on the RS485 network and converts that to the MySensors standard that should work with Domoticz. I just can't seem to figure out what I am doing wrong with the cooling set point. Sending the temp and the heating set point values works perfect, just not the cooling set point.

Its very similar setup. Instead of raw rs485 I'm using modbus with my heat pump. I'll send you a PM about the sketch.

[dbemowsk]

@pjr Thanks for the info. I got your PM and will review the code later tonight.

[dbemowsk]

@pjr said:

I have only one S_HVAC child defined and in my setup it sends ON/OFF state, V_HVAC_SETPOINT_HEAT, V_HVAC_SETPOINT_COOL and V_TEMP -messges.

OK, so I have a question on this. You say you have it sending ON/OFF, V_HVAC_SETPOINT_HEAT, V_HVAC_SETPOINT_COOL and V_TEMP. For ON/OFF, do you mean the V_HVAC_FLOW_STATE which is "Off", "HeatOn", "CoolOn", or "AutoChangeOver"? Can I send all of the following V_HVAC_SETPOINT_HEAT, V_HVAC_SETPOINT_COLD, V_HVAC_FLOW_STATE, V_HVAC_FLOW_MODE, V_HVAC_SPEED through the one child ID as defined in the v 1.5.x serial API docs. That may be my problem as in my code I was trying to send each through it's own child ID. Also, when you define your S_HVAC as the single child, how does Domoticz see that? The way I have mine set up, each one is seen as a separate device.

Thanks for letting me check out your code.

[pjr]

@dbemowsk
These are not supported yet by domoticz:

• V_HVAC_FLOW_STATE
• V_HVAC_FLOW_MODE
• V_HVAC_SPEED

Thats why I'm using V_LIGHT (ON/OFF) currently at the code.

You can check it from here: https://github.com/domoticz/domoticz/blob/master/hardware/MySensorsBase.cpp#L70
Those are not mentioned anywhere but the one list.

[dbemowsk]

@pjr OK, that helps me understand your code better. I am assuming that the "onModbusProcessed" method is to process incoming messages sent by the modbus network and sending them to Domoticz, correct? Processing incoming messages from the RS485 network is where some of my problems are in my setup. I will try tonight to make some code changes to see if I can get it working. My main problem was my cooling set point was not updating in Domoticz correctly. The Heat set point and temp seemed to work. I'll post my findings.

[pjr]

@dbemowsk said:

@pjr OK, that helps me understand your code better. I am assuming that the "onModbusProcessed" method is to process incoming messages sent by the modbus network and sending them to Domoticz, correct?

Thats correct. There I handle the result of a modbus query.
I'm not handling decimals since the heat pump controller supports only full numbers..

[dbemowsk]

So last night I figured out my issue with why my code was not updating the set point cool value. Turns out it was the way I was parsing the string passed from the RS485 side to it's key/value pairs. The string that it was working on was this:

A=0 O=01 T=73.4 SPH=72.1 SPC=70.0\r

The code I had was only taking the key/value pairs up to the last one because I had it keying off of the space character. Since there was no trailing space in the string, the last pair got skipped which was the cooling set point.

I will post some updated code once I get a little more done.

[dbemowsk]

OK, so I had this project on hold for a while and am getting back to it. My issue now is that for some reason I am not receiving messages from Domoticz for this node. If I send a temp set point or status from the RS485 side, it updates in Domoticz, but if I try to change a set point or status in Domoticz, the MySensors node doesn't receive it. The code is a bit messy right now, but it should work with what I have. If someone could look it over and advise, that would be a big help. The sketch is a MySensors 1.5.4 sketch.

 /*
  RCS Thermostat for MySensors

  Arduino RCS RS485 thermostat control

  July 7,2016

  This is a gateway bridge to allow an RCS serial thermostat to be accessible to a MySensors
  gateway.  The thermostat being used to test this is an RCS TR40 RS485 thermostat.  The published
  protocol for RCS thermostats can be found at the following address;
  http://www.rcstechnology.com/oldsite/docs/thermostats/serial/SERIAL%20PROTOCOL%20REV%204.3%20%20150-00225-43.pdf
  
  This sketch features the following:

  Add features here
 */

// Import needed libraries
#include <SPI.h>
#include <MySensor.h>  
#include <SoftwareSerial.h>

#define SKETCH_NAME "RCS TR40 Thermostat"
#define SKETCH_VERSION "1.1"

#define CHILD_ID_HVAC    0 // S_HVAC
#define CHILD_ID_STATE   1 // S_LIGHT

// Declare Constants and Pin Numbers
#define SSerialRX        5  //Serial Receive pin 8
#define SSerialTX        3  //Serial Transmit pin 7

#define SSerialTxControl 4  //RS485 Direction control

#define RS485Transmit    HIGH
#define RS485Receive     LOW

// Declare objects
SoftwareSerial RS485Serial(SSerialRX, SSerialTX); // RX, TX

MySensor gw;

// Sensor values
MyMessage msgStatus ( CHILD_ID_STATE,  V_LIGHT );
MyMessage msgTemp   ( CHILD_ID_HVAC,   V_TEMP );
MyMessage msgSetCool( CHILD_ID_HVAC,   V_HVAC_SETPOINT_COOL );
MyMessage msgSetHeat( CHILD_ID_HVAC,   V_HVAC_SETPOINT_HEAT );

// Declare Variables
int byteReceived;
int byteSend;
String rcvString;
String sndString;
//This is for storing the last command that was sent 
String lastSent;
//the last sent set point
String setPoint;

String mode;
//This is the RS485 address of this node that gets sent to the thermostat
String serialAddr = "1";
//Placeholder for the last command sent
String LastSent = "";

void setup() {
  Serial.begin(9600);
  
  gw.begin( incomingMessage, AUTO, false );
  
  gw.sendSketchInfo( SKETCH_NAME, SKETCH_VERSION );
  
  // Register the thermostat with the gateway
  gw.present( CHILD_ID_HVAC,  S_HVAC );
  gw.present( CHILD_ID_STATE, S_LIGHT );
  
  // put your setup code here, to run once:
  pinMode( SSerialTxControl, OUTPUT );
  digitalWrite( SSerialTxControl, RS485Receive );  // Init Transceiver
  
  // Start the software serial port, to another device
  RS485Serial.begin(9600);   // set the data rate
} //End setup

void loop() {
  String dataIn;
  
  if (RS485Serial.available()) {
    dataIn = RS485Serial.readStringUntil('\n');
    ParseReceived(dataIn);
  }
} //End loop

void ParseReceived(String Message) {
  String StatusData;
  //int Count;
  String StatusString;
  String Status;
  String Type;
  String Value;

  int Index;
  int Start;
  int End;
  int StatIndex;

  Index = Message.indexOf(' ');
  Start = 0;
  
  Serial.println("Message: " + Message);
  
  if (Message.startsWith("A=")) {
    while (End != Message.length()) {
      End = (Index == -1) ? Message.length() : Index;
      //Get the status string to process
      StatusString = Message.substring(Start, End);
      //Change our start position to 1 over the last space found
      Start = Index + 1;
      //Find the end of the next status string
      Index = Message.indexOf(' ', Start);
  
      //Now we need to process the status string into it's Type and Value
      StatIndex = StatusString.indexOf('=');
      Type = StatusString.substring(0, StatIndex);
      Value = StatusString.substring(StatIndex + 1);
      ParseStatus(Type, Value);
    } 
  } else {
    SendCmd(LastSent);
  }
} //End ParseReceived

void ParseStatus(String Type, String Value) {
  //
  
  if (Type == "OA") {
      //Outside Air not used
  } else if (Type == "Z") {
      //Zone not used
  } else if (Type == "T") {
      Serial.println("T: " + Value);
      gw.send(msgTemp.set( F2C( Value.toFloat() ), 2 ));
  } else if (Type == "SP") {
      Serial.println("SP: " + Value);
      gw.send(msgSetCool.set( F2C( Value.toFloat() ), 2 ));
  } else if (Type == "SPH") {
      Serial.println("SPH: " + Value);
      gw.send(msgSetHeat.set( F2C( Value.toFloat() ), 2 ));
  } else if (Type == "SPC") {
      Serial.println("SPC: " + Value);
      gw.send(msgSetCool.set( F2C( Value.toFloat() ), 2 ));
  } else if (Type == "M") {
      //Serial.println("M: " + Value);
      //gw.send(msgFlowMode.set(Value.c_str()));
  } else if (Type == "FM") {
      //Serial.println("FM: " + Value);
      //gw.send(msgFlowMode.set(Value.c_str()));
    //Type 2 status message types
  } else if (Type == "H1A") {
      Serial.println("H1A: " + Value);
      if (Value == "1") {
        //gw.send(msgHvacSpeed.set("Min"));
      } else {
        //gw.send(msgHvacSpeed.set("Auto"));
      }
  } else if (Type == "H2A") {
      Serial.println("H2A: " + Value);
      if (Value == "1") {
        //gw.send(msgHvacSpeed.set("Normal"));
      } else {
        //gw.send(msgHvacSpeed.set("Auto"));
      }
  } else if (Type == "H3A") {
      Serial.println("H3A: " + Value);
      if (Value == "1") {
        //gw.send(msgHvacSpeed.set("Max"));
      } else {
        //gw.send(msgHvacSpeed.set("Auto"));
      }
  } else if (Type == "C1A") {
      Serial.println("C1A: " + Value);
      if (Value == "1") {
        //gw.send(msgHvacSpeed.set("Min"));
      } else {
        //gw.send(msgHvacSpeed.set("Auto"));
      }
  } else if (Type == "C2A") {
      Serial.println("C2A: " + Value);
      if (Value == "1") {
        //gw.send(msgHvacSpeed.set("Normal"));
      } else {
        //gw.send(msgHvacSpeed.set("Auto"));
      }
  } else if (Type == "FA") {
      Serial.println("FA: " + Value);
      if (Value == "1") {
        //gw.send(msgFlowMode.set("ContinuousOn"));
      } else {
        //gw.send(msgHvacSpeed.set("Auto"));
      }
  } else if (Type == "VA") {
      //Vent damper not used
  } else if (Type == "D1") {
      //Damper #1 not used
  } else if (Type == "SCP") {
      String stg1 = Value.substring(0, 1);
      String stg2 = Value.substring(0, Value.length() - 1);

      //logging.AddToLog("MOT/MRT stage 1: " & stg1, True)
      //Deal with minimum off time and minimum run times 
      //for stage 1

      //logging.AddToLog("MOT/MRT stage 2: " & stg2, True)
      //Deal with minimum off time and minimum run times 
      //for stage 2
  } else if (Type == "SM") {
      //logging.AddToLog("System mode: " & Value, True)
      String FlowState;
      
      if (Value == "O") {
        FlowState = "Off";
      } else if (Value == "H") {
        FlowState = "HeatOn";
      } else if (Value == "C") {
        FlowState = "CoolOn";
      } else {
        FlowState = "AutoChangeOver";
      }
      //Serial.println("SM: " + FlowState);
      //gw.send(msgFlowState.set(FlowState.c_str()));
  } else if (Type == "SF") {
      //logging.AddToLog("System fan: " & Value, True) 
      Serial.println("SF: " + Value);
      gw.send(msgStatus.set(Value.toInt()));
  }
} //End ParseStatus

float F2C(float Fahrenheit) {
  return (5.0f/9.0f) * (Fahrenheit-32);
} //End F2C

float C2F(float Celsius) {
  return (Celsius * 9.0f) / 5.0f + 32.0f;
} //End C2F

void SendCmd(String cmd) {
  String commandStr;
  commandStr = "A=" + serialAddr + " O=00 " + cmd;

  Serial.println("Writing to serial port: " + commandStr);
  
  // Enable RS485 Transmit only for the duration of the send
  digitalWrite(SSerialTxControl, RS485Transmit);
  RS485Serial.print(commandStr + "\r");
  LastSent = cmd;
  //Return to RS485 receive mode  
  digitalWrite(SSerialTxControl, RS485Receive);
} //End SendCmd

/**
 * incomingMessage - Process the incoming messages.
 */
void incomingMessage(const MyMessage &message) {
  Serial.println("message received");//String(message.type));
  //Serial.println(message.data);
  // We only expect one type of message from controller. But we better check anyway.
  if (message.isAck()) {
     Serial.println("This is an ack from gateway");
  }
  Serial.println("Temp: " + String(message.data) + " -- " + message.type);
  
  if ( message.type == V_TEMP ) {
    //
    Serial.println("Temp: " + String(message.data)); 
  } //End V_TEMP
  
  if ( message.type == V_STATUS ) {
    //
    Serial.println("Status: " + String(message.data)); 
  } //End V_STATUS
  
  if ( message.type == V_HVAC_FLOW_STATE ) {
    //
    Serial.println("Flow State: " + String(message.data)); 
  } //End V_HVAC_FLOW_STATE
  
  if ( message.type == V_HVAC_SPEED ) {
    //
    Serial.println("Speed: " + String(message.data)); 
  } //End V_HVAC_SPEED

  if (message.type == V_HVAC_SETPOINT_COOL) {
     Serial.println("Message received");
     String setPoint = String(C2F(atoi(message.data)));
     Serial.println("New Set Temp is : " + String(setPoint));
     SendCmd("SPC=" + setPoint + " R=1");
    
     // Write some debug info
     Serial.print("Incoming change for sensor:");
     Serial.print(message.sensor);
     Serial.print(", New status: ");
     Serial.println(message.data);
  } //End V_HVAC_SETPOINT_COOL

  if (message.type == V_HVAC_SETPOINT_HEAT) {
     Serial.println("Message received");
     String setPoint = String(C2F(atoi(message.data))); //.toInt();
     Serial.println("New Set Temp is : " + String(setPoint));
     SendCmd("SPH=" + setPoint + " R=1");
    
     // Write some debug info
     Serial.print("Incoming change for sensor:");
     Serial.print(message.sensor);
     Serial.print(", New status: ");
     Serial.println(message.data);
  } //End V_HVAC_SETPOINT_HEAT
  
  if ( (message.type == V_HVAC_FLOW_MODE) ) {
    //
    Serial.println("Flow Mode: " + String(message.data)); 
  } //End V_HVAC_FLOW_MODE
} //End incomingMessage

Thanks

[AWI]

@dbemowsk What does the serial log of the node tell you? Does it show messages coming in?

[AWI]

@dbemowsk And... (sorry to bother you with things you didn't ask for) Your sketch is loaded with String object definitions and therefore open fora lot of problems. String looks like an easy solution but not really suited for real time (MySensors) purposes.
An interesting article/ opinion background on the subject...

My advice: Forget about String and get back to comprehensible char arrays. (unless somebody can convince me otherwise) .

[dbemowsk]

@AWI said:

@dbemowsk What does the serial log of the node tell you? Does it show messages coming in?

I put the first Serial.println in the incomingMessage function to test and see if it was even hitting that function. I am not even seeing that in the serial monitor. That was the thing that prompted me to post this.

The set-up I have for testing right now is I have my node connected to the FTDI usb cable on one end (COM5). On the RS485 end (COM10) I have it looped back to my laptop through a USB to RS485 adapter. I then use a serial terminal program to transmit and receive strings similar to what would come from my thermostat. As I mentioned in my post, if I send a command on the RS485 side as if my thermostat controller sent it, it goes through ParseReceived and ParseStatus normally and the gw.send commands push it to Domoticz just fine.

I just can't think of any reason why the incoming messages from Domoticz are not being seen by the node. One thing I did find strange was that in order to see the Serial.println messages in the arduino serial monitor, I have it set to a baud of 115200 bps. The thing that confused me was that I have the first line in set-up as :

Serial.begin(9600);

I did this because that is the baud rate that my thermostat communicates at on the RS485 side of things. I realize that this is for the RS232 serial side on the arduino which is why I was confused.

[dbemowsk]

@AWI said:

@dbemowsk And... (sorry to bother you with things you didn't ask for) Your sketch is loaded with String object definitions and therefore open fora lot of problems. String looks like an easy solution but not really suited for real time (MySensors) purposes.
An interesting article/ opinion background on the subject...

My advice: Forget about String and get back to comprehensible char arrays. (unless somebody can convince me otherwise) .

No need to appologize. C and C++ are languages that I have not done much programming in. Well, a very limited amount of C++ and I have never used C (until getting into arduino which seems to be more C based). As I have been working in my arduuino stuff I have been seeing more people using char and char* definitions. That and converting to these using c_str(). As mentioned, I am new to these languages, so if you know of any good tutorials on how to use these versus String, I am open to suggestions. I have not yet looked at the link you posted, but will shortly. If this is the more proper way to do things in arduino, I would like to shift my thinking in that direction.

[dbemowsk]

@awi I am part way through your article on strings describing the stack and the heap. GREAT article. I have not finished it yet, but what I have read so far is excellent info.