Remote controlled switches (433MHz) and temperature sensors



  • Hi guys,

    I've been trying to build a 433MHz transmitter and temperature sensor for two Dallas sensors. The goal is to monitor my heating system and turn on/off the recirculating pumps using the 433MHz switches. Up until now this has been done manually (through remote), but I would really love to automate this.

    The problem is that I suck badly at coding, everything goes over my head (sorry), so I've been trying to adapt the currently available code into a single sketch that would help me do this.

    Using the RC Switch library I was able to find out the codes I need to be sending to control my 3 RF switches. Now here comes the funny part, I've used @Dwalt sketch and modified to something I think should work(I am very bad at coding 😞). I've also included bits from a multi-sensor sketch I had from @gregl to get at least one temperature sensor added (no idea how to add two).

    I've flashed it on my nano, but when included on the Vera lite (UI5), only the 3 switch devices show up on the interface but no temperature device is created. Using serial monitor I can see that temperature is sent back, but unfortunately the switches from the interface do not seem to control my RF switches.

    I would appreciate any hints on my current issues :

    • how to get two temperature sensors to show up on interface (including the current one)
    • how to correct the RF transmission

    The code is the one below :

    //  Include related libraries
    #include <MySensor.h>
    #include <SPI.h>  
    #include <RF24.h>
    #include <RCSwitch.h>
    #include <DallasTemperature.h>
    #include <OneWire.h>
    
    //  Define Constants
    #define RF433_CHILD_ID 0
    #define NUMBER_OF_OUTLETS 3 // Each outlet will have 2 OOK codes
    #define SEND_DATA 3 // pin used to send 433MHz data
    #define CLIENT_ID AUTO  // Sets MYSensors client id
    #define RADIO_CH 76  // Sets MYSensors to use Radio Channel
    
    //Temp Sensor bits
    #define ONE_WIRE_BUS 4 // Pin where dallas sensor is connected - on Rboard this is (D4)
    OneWire oneWire(ONE_WIRE_BUS);
    DallasTemperature DallasSensors(&oneWire);
    float lastTemperature ;
    float tempC = DallasSensors.getTempCByIndex(1);
    RCSwitch mySwitch = RCSwitch();
    #define CHILD_ID_T1 4 //CHILD ID for temperature
    
    MySensor gw;
    MyMessage tempMsg(CHILD_ID_T1,V_TEMP);
    
    void setup() 
    {
          
     Serial.begin(115200); // Not sure why this was included
    
     //  The node is mains powered, so why not make it a repeater.
     gw.begin(incomingMessage, CLIENT_ID , false,AUTO,RF24_PA_MAX,RADIO_CH,RF24_250KBPS);
     
      // Send the sketch version information to gateway
     gw.sendSketchInfo("RF433_Temp", "1.0");
      //enable RF 433MHz transmitter
     mySwitch.enableTransmit(SEND_DATA);
     // Register outlets to gw (they will be created as child devices)
     for(int i=0; i<NUMBER_OF_OUTLETS;i++) {
       gw.present(i+1, S_LIGHT);
    
     }
    // Fetch temperatures from Dallas sensors
    DallasSensors.requestTemperatures();
    
    		
    // Only send data if temperature has changed and no error
      if (lastTemperature != tempC && tempC != -127.00) {
    
      // Send in the new temperature
      gw.send(tempMsg.set(tempC,1));
    lastTemperature=tempC;
      } 
    }
    
    void loop() {
      gw.process();
    }
      void incomingMessage(const MyMessage &message) {
    
      if (message.type==V_LIGHT) {
      int incomingLightState =  message.getBool(); 
      int incomingOutlet = message.sensor;
    
      Serial.print("Outlet #: ");
      Serial.println(message.sensor);
      Serial.print("Command: ");
      Serial.println(message.getBool());
    
     if (incomingOutlet==1) {
     if (incomingLightState==1) {
    // Turn on  socket 1
     Serial.println("Turn on Socket 1");
     mySwitch.switchOn("10101", "10000"); // These codes are unique to each outlet
     delay(50); 
     }
     if (incomingLightState==0)  {
    // Turn off socket 1
    Serial.println("Turn off Socket 1");
    mySwitch.switchOff("10101", "10000");
    delay(50); 
     }
     }
     if (incomingOutlet==2) {
     if (incomingLightState==1) {
    // Turn on  socket 2
    Serial.println("Turn on Socket 2");
    mySwitch.switchOn("10101", "01000");
     delay(50); 
     }
     if (incomingLightState==0)  {
    // Turn off socket 2
     Serial.println("Turn off Socket 2");
     mySwitch.switchOff("10101", "01000");
    delay(50); 
     }
     }
     if (incomingOutlet==3) {
     if (incomingLightState==1) {
    // Turn on  socket 3
    Serial.println("Turn on Socket 3");
     mySwitch.switchOn("10101", "00100");
     delay(50); 
     }
     if (incomingLightState==0)  {
    // Turn off socket 3
     Serial.println("Turn off Socket 3");
    mySwitch.switchOff("10101", "00100");
    delay(50); 
     }
     }
     }
     delay(50);
     }


  • Looking in the Vera logs this is what I actually see when I try to control one switch from the interface :

    08      02/26/15 18:23:50.791   JobHandler_LuaUPnP::HandleActionRequest device: 57 service: urn:upnp-org:serviceId:SwitchPower1 action: SetTarget <0x2f6a5680>
    08      02/26/15 18:23:50.791   JobHandler_LuaUPnP::HandleActionRequest argument DeviceNum=57 <0x2f6a5680>
    08      02/26/15 18:23:50.791   JobHandler_LuaUPnP::HandleActionRequest argument serviceId=urn:upnp-org:serviceId:SwitchPower1 <0x2f6a5680>
    08      02/26/15 18:23:50.792   JobHandler_LuaUPnP::HandleActionRequest argument action=SetTarget <0x2f6a5680>
    08      02/26/15 18:23:50.792   JobHandler_LuaUPnP::HandleActionRequest argument newTargetValue=0 <0x2f6a5680>
    08      02/26/15 18:23:50.792   JobHandler_LuaUPnP::HandleActionRequest argument rand=0.6773929147942098 <0x2f6a5680>
    50      02/26/15 18:23:50.795   luup_log:34: Arduino: Sending: 19;1;1;1;2;0 <0x2b772000>
    51      02/26/15 18:23:50.796   0x31 0x39 0x3b 0x31 0x3b 0x31 0x3b 0x31 0x3b 0x32 0x3b 0x30 0xd 0xa (19;1;1;1;2;0\r\n) <0x2b772000>
    52      02/26/15 18:23:50.852   0x30 0x3b 0x30 0x3b 0x33 0x3b 0x30 0x3b 0x39 0x3b 0x73 0x65 0x6e 0x64 0x3a 0x20 0x30 0x2d 0x30 0x2d 0x31 0x39 0x2d 0x31 0x39 0x20 0x73 0x3d 0x31 0x2c 0x63 0x3d 0x31 0x2c 0x74 0x3d 0x32 0x2c 0x70 0x74 0x3d 0x30 0x2c 0x6c 0x3d 0x31 0x2c 0x73 0x74 0x3d 0x66 0x61 0x69 0x6c 0x3a 0x30 (0;0;3;0;9;send: 0-0-19-19 s=1,c=1,t=2,pt=0,l=1,st=fail:0) <0x2f8e8680>
    50      02/26/15 18:23:50.853   luup_log:34: Arduino: Log: send: 0-0-19-19 s=1,c=1,t=2,pt=0,l=1,st=fail:0 <0x2f8e8680>
    08      02/26/15 18:23:51.815   JobHandler_LuaUPnP::HandleActionRequest device: 57 service: urn:upnp-org:serviceId:SwitchPower1 action: SetTarget <0x2f6a5680>
    08      02/26/15 18:23:51.815   JobHandler_LuaUPnP::HandleActionRequest argument DeviceNum=57 <0x2f6a5680>
    08      02/26/15 18:23:51.816   JobHandler_LuaUPnP::HandleActionRequest argument serviceId=urn:upnp-org:serviceId:SwitchPower1 <0x2f6a5680>
    08      02/26/15 18:23:51.816   JobHandler_LuaUPnP::HandleActionRequest argument action=SetTarget <0x2f6a5680>
    08      02/26/15 18:23:51.816   JobHandler_LuaUPnP::HandleActionRequest argument newTargetValue=1 <0x2f6a5680>
    08      02/26/15 18:23:51.816   JobHandler_LuaUPnP::HandleActionRequest argument rand=0.17616296711805424 <0x2f6a5680>
    50      02/26/15 18:23:51.832   luup_log:34: Arduino: Sending: 19;1;1;1;2;1 <0x2b772000>
    51      02/26/15 18:23:51.833   0x31 0x39 0x3b 0x31 0x3b 0x31 0x3b 0x31 0x3b 0x32 0x3b 0x31 0xd 0xa (19;1;1;1;2;1\r\n) <0x2b772000>
    52      02/26/15 18:23:51.883   0x30 0x3b 0x30 0x3b 0x33 0x3b 0x30 0x3b 0x39 0x3b 0x73 0x65 0x6e 0x64 0x3a 0x20 0x30 0x2d 0x30 0x2d 0x31 0x39 0x2d 0x31 0x39 0x20 0x73 0x3d 0x31 0x2c 0x63 0x3d 0x31 0x2c 0x74 0x3d 0x32 0x2c 0x70 0x74 0x3d 0x30 0x2c 0x6c 0x3d 0x31 0x2c 0x73 0x74 0x3d 0x66 0x61 0x69 0x6c 0x3a 0x31 (0;0;3;0;9;send: 0-0-19-19 s=1,c=1,t=2,pt=0,l=1,st=fail:1) <0x2f8e8680>
    50      02/26/15 18:23:51.884   luup_log:34: Arduino: Log: send: 0-0-19-19 s=1,c=1,t=2,pt=0,l=1,st=fail:1 <0x2f8e8680>
    

    From serial monitor I see this output:

    sensor started, id 19
    send: 19-19-0-0 s=255,c=0,t=17,pt=0,l=3,st=fail:1.4
    send: 19-19-0-0 s=255,c=3,t=6,pt=1,l=1,st=fail:0
    send: 19-19-0-0 s=255,c=3,t=11,pt=0,l=5,st=fail:RF433
    send: 19-19-0-0 s=255,c=3,t=12,pt=0,l=3,st=ok:1.0
    send: 19-19-0-0 s=1,c=0,t=3,pt=0,l=3,st=fail:1.4
    send: 19-19-0-0 s=2,c=0,t=3,pt=0,l=3,st=fail:1.4
    send: 19-19-0-0 s=3,c=0,t=3,pt=0,l=3,st=ok:1.4
    send: 19-19-0-0 s=4,c=1,t=0,pt=7,l=5,st=fail:21.1


  • @CaptainZap Just a quick look at your sketch and I see that your temp fetching commands are in 'setup' and not 'loop'', that may explain the lack of temp data. As for the 433 commands, I am not familiar with the RCSwitch library and how it works. For my sketch, I spelled out the transmit process by defining a command (in my sketch it was "pt2262Send", which I borrowed from somewhere else but cant remember where off hand) and used that command within the loop when the V_Light message was received. I used the binary code I received from raw sniffing of the signal.



  • @Dwalt Thank you for pointing that out, I am that bad at coding. Anyway, I've done that and I've tried to rewrite the part for two temperature sensors but they still don't show up on the Vera interface.
    I've done some testing and said that I should ditch RCSwitch library and use instead a simple function they provide, so I've retested the switches, and made sure that the code send is correct but I still can't control any switches. Also the temperature sensors do not show up. I need help guys, I feel I am so close it's kind of frustrating 😞

    Below is the revised code :

    #include <MySensor.h>
    #include <SPI.h>  
    #include <RF24.h>
    #include <DallasTemperature.h>
    #include <OneWire.h>
    
    //  Define Constants
    #define RF433_CHILD_ID 0
    #define NUMBER_OF_OUTLETS 3
    #define CLIENT_ID AUTO  // Sets MYSensors client id
    #define RADIO_CH 76  // Sets MYSensors to use Radio Channel
    #define MAX_ATTACHED_DS18B20 2
    unsigned long SLEEP_TIME = 30000; // Sleep time between reads (in milliseconds)
    //Temp Sensor bits
    #define ONE_WIRE_BUS 4 // Pin where dallas sensor is connected - on Rboard this is (D4)
    OneWire oneWire(ONE_WIRE_BUS);
    DallasTemperature sensors(&oneWire);
    float lastTemperature[MAX_ATTACHED_DS18B20];
    int numSensors=0; // >> in original temp sketch this is 0 should it be changed to 2 ?
    int RCLpin = 3;
    MySensor gw;
    MyMessage msg(0,V_TEMP);
    
     void RCLswitch(uint16_t code) {
    for (int nRepeat=0; nRepeat<6; nRepeat++) {
        for (int i=4; i<16; i++) {
            RCLtransmit(1,3);
            if (((code << (i-4)) & 2048) > 0) {
                RCLtransmit(1,3);
            } else {
                RCLtransmit(3,1);
            }
        }
        RCLtransmit(1,31);    
    }
    }
    
    void RCLtransmit(int nHighPulses, int nLowPulses) {
    digitalWrite(RCLpin, HIGH);
    delayMicroseconds( 350 * nHighPulses);
    digitalWrite(RCLpin, LOW);
    delayMicroseconds( 350 * nLowPulses);
    }
    
    void setup() 
    {
    
     Serial.begin(115200); // Not sure why this was included
    
     //  The node is mains powered, so why not make it a repeater.
     gw.begin(incomingMessage, CLIENT_ID , false,AUTO,RF24_PA_MAX,RADIO_CH,RF24_250KBPS);
    
      // Send the sketch version information to gateway
     gw.sendSketchInfo("RF433&Temp", "1.0b");
    
      //enable RF 433MHz transmitter
     pinMode(RCLpin, OUTPUT);
    
     // Register outlets to gw (they will be created as child devices)
     for(int i=0; i<NUMBER_OF_OUTLETS;i++) {
       gw.present(i+1, S_LIGHT);
    
    // Fetch the number of attached temperature sensors  
      numSensors = sensors.getDeviceCount();
    
    // Present all sensors to controller
      for (int i=0; i<numSensors && i<MAX_ATTACHED_DS18B20; i++) {   
         gw.present(i, S_TEMP);
    
     }
    }
    }
    
    void loop() {
      gw.process();
      // Fetch temperatures from Dallas sensors
    //DallasSensors.requestTemperatures();
    sensors.requestTemperatures(); 
    	
    // Read temperatures and send them to controller 
      for (int i=0; i<numSensors && i<MAX_ATTACHED_DS18B20; i++) {
    
    // Fetch and round temperature to one decimal
    float temperature = static_cast<float>(static_cast<int>((gw.getConfig().isMetric?sensors.getTempCByIndex(i):sensors.getTempFByIndex(i)) * 10.)) / 10.;
    
    // Only send data if temperature has changed and no error
    if (lastTemperature[i] != temperature && temperature != -127.00) {
    
      // Send in the new temperature
      gw.send(msg.setSensor(i).set(temperature,1));
      lastTemperature[i]=temperature;
    }
    }
    }
      void incomingMessage(const MyMessage &message) {
      
      if (message.type==V_LIGHT) {
      int incomingLightState =  message.getBool(); 
      int incomingOutlet = message.sensor;
    
      Serial.print("Outlet #: ");
      Serial.println(message.sensor);
      Serial.print("Command: ");
      Serial.println(message.getBool());
    
     if (incomingOutlet==1) {
     if (incomingLightState==1) {
    // Turn on  socket 1
    Serial.println("Turn on Socket 1");
    RCLswitch(0b101011000001);// These codes are unique to each outlet
     }
     if (incomingLightState==0)  {
    // Turn off socket 1
    Serial.println("Turn off Socket 1");
    RCLswitch(0b101011000010);
     }
     }
     if (incomingOutlet==2) {
     if (incomingLightState==1) {
    // Turn on  socket 2
    Serial.println("Turn on Socket 2");
    RCLswitch(0b101010100001);
     }
     if (incomingLightState==0)  {
    // Turn off socket 2
    Serial.println("Turn off Socket 2");
    RCLswitch(0b101010100010);
     }
     }
     if (incomingOutlet==3) {
     if (incomingLightState==1) {
    // Turn on  socket 3
    Serial.println("Turn on Socket 3");
    RCLswitch(0b101010010001);
     }
     if (incomingLightState==0)  {
    // Turn off socket 3
    Serial.println("Turn off Socket 3");
    RCLswitch(0b101010010010); 
     }
     }
     }
     gw.sleep(SLEEP_TIME);
     }

  • Hero Member

    To be sure that the sensor works, you should download myscontroller from here : goo.gl/9DCWNo
    (http://forum.mysensors.org/topic/838/windows-gui-controller-for-mysensors/33)

    Edit the ini file and enter the ip and port of your mysensors-gateway or com port which depends on the type of gateway you are using.
    Start MysController and click the connect button.
    Now power on your sensor and check if the sensor is sending values.

    If everything is ok then something is wrong with your vera integration. If the sensor does not show up then something is wrong with your sensor. You can also send messages to your sensor with myscontroller to check if your incomming function works.


  • Hero Member

    Have a look at this lib
    https://code.google.com/p/rc-switch/



  • @Heinz I've used that lib in both my tries (it works with their sketch, but not with mine), but I will try the windows GUI and see how that goes.

    LE: While bringing the serial gateway near my computer, I broke off the mini USB port (on the nano I was testing this), something dropped on it and all hell broke loose. I'll check it out tomorrow, but I would really appreciate if someone could take a look at my code. It has to be something I used incorrectly.


  • Admin

    @CaptainZap I would start by trying to eliminate the st=fail: issue in your logs first. That is indicative of a wireless comm problem, at times indicating a message size failure. The root cause in my case was not due to software, but due to the circuit state which I corrected by power cycling, not hard resetting, to stabilize the current/radio.



  • @blacey
    Thanks for the feedback, today I started from scratch with a brand spanking new arduino nano ready for flashing. I ditched the temperature sensor part because yesterday I was being a bit too cocky, and rewrote the the sketch based on @Dwalt example combined with the TypeA_lightweight example from RC Switch and I can successfully say that I was able to control my switches !!!

    YAY! , now how do I add the temperature part as I need to monitor two temperature sensors from the device.

    FYI, this is the sketch I have that works :

    #include <MySensor.h>
    #include <SPI.h>  
    #include <RF24.h>
    
    #define NUMBER_OF_OUTLETS 3 // Each outlet will have 2 OOK codes
    #define SEND_DATA 3
    
    MySensor gw;
    int RCLpin = 3;
    
    void RCLswitch(uint16_t code) {
    for (int nRepeat=0; nRepeat<6; nRepeat++) {
        for (int i=4; i<16; i++) {
            RCLtransmit(1,3);
            if (((code << (i-4)) & 2048) > 0) {
                RCLtransmit(1,3);
            } else {
                RCLtransmit(3,1);
            }
        }
        RCLtransmit(1,31);    
    }
    }
    
    void RCLtransmit(int nHighPulses, int nLowPulses) {
    digitalWrite(RCLpin, HIGH);
    delayMicroseconds( 350 * nHighPulses);
    digitalWrite(RCLpin, LOW);
    delayMicroseconds( 350 * nLowPulses);
    }
    
    void setup() 
    {
    
     //  The node is mains powered, so why not make it a repeater.
     gw.begin(incomingMessage, AUTO, true);
    
     // Send the sketch version information to gateway
     gw.sendSketchInfo("RF433", "0.1");
    
     pinMode(RCLpin, OUTPUT);
    
     // Register outlets to gw (they will be created as child devices)
    for(int i=0; i<NUMBER_OF_OUTLETS;i++) {
       gw.present(i+1, S_LIGHT);
    
     }
    
    }
    
    void loop() {
      gw.process();
    }
      void incomingMessage(const MyMessage &message) {
    
      if (message.type==V_LIGHT) {
      int incomingLightState =  message.getBool(); 
      int incomingOutlet = message.sensor;
    
      Serial.print("Outlet #: ");
      Serial.println(message.sensor);
      Serial.print("Command: ");
      Serial.println(message.getBool());
    
     if (incomingOutlet==1) {
     if (incomingLightState==1) {
    // Turn on  socket 1
    Serial.println("Turn on Socket 1");
     RCLswitch(0b101011000001);// These codes are unique to each outlet
     delay(50); 
     }
     if (incomingLightState==0)  {
    // Turn off socket 1
     Serial.println("Turn off Socket 1");
     RCLswitch(0b101011000010);
     delay(50); 
     }
     }
     if (incomingOutlet==2) {
     if (incomingLightState==1) {
    // Turn on  socket 2
    Serial.println("Turn on Socket 2");
     RCLswitch(0b101010100001);
     delay(50); 
     }
     if (incomingLightState==0)  {
    // Turn off socket 2
     Serial.println("Turn off Socket 2");
     RCLswitch(0b101010100010);
     delay(50); 
     }
     }
     if (incomingOutlet==3) {
     if (incomingLightState==1) {
    // Turn on  socket 3
    Serial.println("Turn on Socket 3");
     RCLswitch(0b101010010001);
     delay(50); 
     }
     if (incomingLightState==0)  {
    // Turn off socket 3
     Serial.println("Turn off Socket 3");
     RCLswitch(0b101010010010);
     delay(50); 
     }
     }
     }
     delay(50);
     }


  • Just an update on this, I've spent several hours today but I was able to get the sketch to show up 1 temperature sensor, and then two temperature sensors. Now the problem I have is that the two temperature sensors display the same value. They are connected to different pins on the arduino, 4 and 5, and are not wired in parallel. This is the temperature sensor part :

    OneWire oneWire(ONE_WIRE_BUS);
    DallasTemperature DallasSensors(&oneWire);
    float lastTemperature ;
    float lastTemperature1 ;
    #define CHILD_ID_T1 4 //CHILD ID for temperature sensor1
    #define CHILD_ID_T2 5 //CHILD ID for temperature sensor2
    
    MyMessage tempMsg(CHILD_ID_T1,V_TEMP);
    MyMessage tempMsg2(CHILD_ID_T2,V_TEMP);
    
    
    void setup() 
    {
    
    {...} // the lights part
     gw.present(CHILD_ID_T1, S_TEMP);
     gw.present(CHILD_ID_T2, S_TEMP);
    }
    
    void loop() {
      gw.process();
      // Fetch temperatures from Dallas sensors
    	DallasSensors.requestTemperatures();
    	float tempC = DallasSensors.getTempCByIndex(1);
                float tempD = DallasSensors.getTempCByIndex(2);
    	
    	// Only send data if temperature has changed and no error
    	if (lastTemperature != tempC && tempC != -127.00) {
    		
    		// Send in the new temperature
    		gw.send(tempMsg.set(tempC,1));
    		lastTemperature=tempC;
    	}  
              // Only send data if temperature has changed and no error
    	if (lastTemperature1 != tempD && tempD != -127.00) {
    		
    		// Send in the new temperature
    		gw.send(tempMsg2.set(tempD,1));
    		lastTemperature1=tempD;
    	}
    }
    

    Anyone got any hints ? I'm so close on finalizing this ! I've learned a lot over the last couple of days πŸ˜„

    LE: After writing this here I realized I didn't declare the second pin in the code and thus was using the same one. I've corrected that and this WAS IT !


  • Admin

    @CaptainZap

    Why did you connect the two sensors to two different pins on the arduino? Onewire bus is exactly what it says, only a single wire, and a bus (meaning that it supports multiple devices)

    you have

    OneWire onewire(ONE_WIRE_BUS)
    

    ONE_WIRE_BUS is the pin that all your DS1820 sensors are connected to..



  • @tbowmo Because I don't know how to use the library correctly. I don't know how to display two sensors connected to the same port so I've done it how I knew. I am a beginner at coding and I know it can be simplified but this is as much as I know. I would like to see how you would do it πŸ™‚

    This is my last code for the temperature part:

    #define ONE_WIRE_BUS 4 // Pin where dallas sensor is connected - on Rboard this is A0(D14)
    #define ONE_WIRE_BUS2 5
    OneWire oneWire(ONE_WIRE_BUS);
    DallasTemperature DallasSensors(&oneWire);
    
    OneWire oneWire2(ONE_WIRE_BUS2);
    DallasTemperature DallasSensors2(&oneWire2);
    
    float lastTemperature ;
    float lastTemperature1 ;
    #define CHILD_ID_T1 4 //CHILD ID for temperature sensor1
    #define CHILD_ID_T2 5 //CHILD ID for temperature sensor2
    
    MyMessage tempMsg(CHILD_ID_T1,V_TEMP);
    MyMessage tempMsg2(CHILD_ID_T2,V_TEMP);
    
    void setup() 
    {
    
    {...} // the lights part
     gw.present(CHILD_ID_T1, S_TEMP);
     gw.present(CHILD_ID_T2, S_TEMP);
    }
    void loop() {
      gw.process();
      // Fetch temperatures from Dallas sensors
    	DallasSensors.requestTemperatures();
    	float tempC = DallasSensors.getTempCByIndex(1);
                DallasSensors2.requestTemperatures();
                float tempD = DallasSensors2.getTempCByIndex(1);
    	
    	// Only send data if temperature has changed and no error
    	if (lastTemperature != tempC && tempC != -127.00) {
    		
    		// Send in the new temperature
    		gw.send(tempMsg.set(tempC,1));
    		lastTemperature=tempC;
    	}  
              // Only send data if temperature has changed and no error
    	if (lastTemperature1 != tempD && tempD != -127.00) {
    		
    		// Send in the new temperature
    		gw.send(tempMsg2.set(tempD,1));
    		lastTemperature1=tempD;
    	}
    }

  • Hero Member

    Indexes usually start at 0 not at 1
    try getTempCByIndex(0);



  • As per @Heinz suggestion I was able to use only one pin to get both temperature values, now I'm looking at lowering the refresh rate interval, now happens very fast. He suggested using millis(), but didn't help much.

    Also I have one other question, I've noticed that when the node is on my desk (about 5 meters and 1 wall) from the gateway the RF switches no longer work, but the sensors do keep updating without any issues. I don't understand exactly why would this be the case.

    LE: Seems that the issue with the RF is related to the power output from my USB port, I changed to a different one and it works without issue. Weird anyway.


  • Admin

    @CaptainZap said:

    @tbowmo Because I don't know how to use the library correctly. I don't know how to display two sensors connected to the same port so I've done it how I knew. I am a beginner at coding and I know it can be simplified but this is as much as I know. I would like to see how you would do it πŸ™‚

    Take a look at the dallas example that comes with the mysensors library it supports multiple ds1820s.

    http://www.mysensors.org/build/temp

    Think that everything you need is there.


  • Hero Member

    @CaptainZap I had the same problem with the range.
    The sensor is able to send data to the gateway but the gateway fails to send commands to the sensor.
    I found out that the maximum power level of the gateway sender is not set to maximum by default, but the
    level of the sensor is. I simply changed the value before compiling the gateway in
    MyConfig.h
    #define RF24_PA_LEVEL_GW RF24_PA_MAX



  • @Heinz Thanks for pointing that out, since I plan to have most if not all my sensors ac powered I'll change that.


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