[Tutorial] openHAB with serial gateway

schudoel

@TimO Thank you very much! I could not get the Symlink to work at first, but then I fould this, maybe it can help other Raspberry Pi owners.

@Jan-Gatzke I tried to connect a different sensor (RelayActuator) to my Gateway, added it to my .items, .sitemap and added your V_LIGHT routine in my .rules, but no success. Did I miss anything?

Thanks to all of you
Flo

Jan Gatzke

@schudoel These rules do only handle incoming messages from the sensor nodes. If you want to switch a relay you need an additional rule which sends the command to the the serial device.

schudoel

@Jan-Gatzke Thank you! I had a rule for the command, but it did not work out as I wanted. I think I had a typo in the code, but I could fix it. Are there any log files I could use for debugging the rules?

This is the code I use now:

import org.openhab.core.library.types.*
import org.openhab.core.persistence.*
import org.openhab.model.script.actions.*
import org.joda.time.*
import java.util.*
import org.eclipse.xtext.xbase.lib.*
import org.openhab.core.items.*


var String ArduinoUpdate = ""
var String sketchName = ""

var int V_TEMP = 0
var int V_HUM = 1
var int V_LIGHT = 2
var int V_DIMMER = 3
var int V_PRESSURE = 4
var int V_FORECAST = 5
var int V_RAIN = 6
var int V_RAINRATE = 7
var int V_WIND = 8
var int V_GUST = 9
var int V_DIRECTION = 10
var int V_UV = 11
var int V_WEIGHT = 12
var int V_DISTANCE = 13
var int V_IMPEDANCE = 14
var int V_ARMED = 15
var int V_TRIPPED = 16
var int V_WATT = 17
var int V_KWH = 18
var int V_SCENE_ON = 19
var int V_SCENE_OFF = 20
var int V_HEATER = 21
var int V_HEATER_SW = 22
var int V_LIGHT_LEVEL = 23
var int V_VAR1 = 24
var int V_VAR2 = 25
var int V_VAR3 = 26
var int V_VAR4 = 27
var int V_VAR5 = 28
var int V_UP = 29
var int V_DOWN = 30
var int V_STOP = 31
var int V_IR_SEND = 32
var int V_IR_RECEIVE = 33
var int V_FLOW = 34
var int V_VOLUME = 35
var int V_LOCK_STATUS = 36
var int V_DUST_LEVEL = 37
var int V_VOLTAGE = 38
var int V_CURRENT = 39
var int msgPresentation = 0
var int msgSet = 1
var int msgReq = 2
var int msgInternal = 3
var int msgStream = 4
var int alarmArmor = 1

// Internal Commands

var int I_BATTERY_LEVEL = 0
var int I_TIME = 1
var int I_VERSION = 2
var int I_ID_REQUEST = 3
var int I_ID_RESPONSE = 4
var int I_INCLUSION_MODE = 5
var int I_CONFIG = 6
var int I_FIND_PARENT = 7
var int I_FIND_PARENT_RESPONSE = 8
var int I_LOG_MESSAGE = 9
var int I_CHILDREN = 10
var int I_SKETCH_NAME = 11
var int I_SKETCH_VERSION = 12
var int I_REBOOT = 13
var int I_GATEWAY_READY = 14

// Mappings
var HashMap<String, String> sensorToItemsMap = newLinkedHashMap(
    "100;0;"            -> "livingHum01",
    "livingHum01"       -> "100;0;",
    "100;1;"            -> "livingTemp01",
    "livingTemp01"      -> "100;1;",
    "101;1;"            -> "livingRelay",
    "livingRelay"       -> "101;1;"
)

//switch function
val org.eclipse.xtext.xbase.lib.Functions$Function4 switchOperation = [
    org.openhab.core.library.items.SwitchItem relayItem, 
    org.openhab.core.library.items.StringItem arduinoItem, 
    String arduinoDevMap,
    Integer subType|
    var Integer state = 0
        if (relayItem.state == OFF) {
        state = 0 
    }
    else {
        state = 1
    }
    println ("Function: switchOperation >> "+arduinoDevMap + "1;1;" + subType + ";" + state )
    arduinoItem.sendCommand(arduinoDevMap + "1;0;" + subType + ";" + state + "\n")
]



//receiving msg from mysensors gateway
rule "Arduino sends to Openhab"
    when
        Item Arduino received update
    then
        var String lineBuffer =  Arduino.state.toString.split("\n")
        for (String line : lineBuffer) {
            var String[] message = line.split(";")
            var Integer nodeId = new Integer(message.get(0))
            var Integer childId = new Integer(message.get(1))
            var Integer msgType = new Integer(message.get(2))
            var Integer ack = new Integer(message.get(3))
            var Integer subType = new Integer(message.get(4))
            var String msg = message.get(5)
            if(msgType == 1 ){
                if (subType == V_TEMP){
                    postUpdate(sensorToItemsMap.get( nodeId + ";" + childId + ";"), msg)
                    println ("Temp item: " + sensorToItemsMap.get( nodeId + ";" + childId + ";") + " temp: " + msg )
                    }
                if (subType == V_HUM){
                    postUpdate(sensorToItemsMap.get( nodeId + ";" + childId + ";"), msg)
                    println ("Hum item: " + sensorToItemsMap.get( nodeId + ";" + childId + ";") + " hum: " + msg )
                    }
		if (subType == V_LIGHT){
                    var String state
                    var Integer statusInt = new Integer(message.get(5))
                    if(statusInt == 1) { 
                        state = "ON"
                        } 
                    else { 
                        state = "OFF" 
                        }
                    postUpdate(sensorToItemsMap.get( nodeId + ";" + childId + ";"), state)
                    println ("Light Item: " + sensorToItemsMap.get( nodeId + ";" + childId + ";") + " Light: " + state )
                    }


            // Internal Command
            if(msgType == 3){
                if(subType == I_SKETCH_NAME){
                        println("Sketch name: " + msg )
                        sketchName=msg
                    }
                if(subType == I_SKETCH_VERSION){
                        println("Sketch version: " + msg )
                        postUpdate(sensorToItemsMap.get( nodeId + ";" + childId + ";"), sketchName+" " +msg )
                        sketchName=""
                    }
		
                }
            }   
        }
end

rule "livingRelay Switch Rule"
    when
        Item livingRelay changed
    then
        switchOperation.apply(livingRelay, Arduino, sensorToItemsMap.get("livingRelay"), V_LIGHT)         
end

and it's working like charm.

schudoel

Was working ... I do not know why, but after I changed the power cables of the sensor, it stopped working correctly. Serial output:

repeater started, id 101
send: 101-101-0-0 s=255,c=0,t=18,pt=0,l=5,st=fail:1.4.1
send: 101-101-0-0 s=255,c=3,t=6,pt=1,l=1,st=fail:0
send: 101-101-0-0 s=255,c=3,t=11,pt=0,l=5,st=fail:Relay
send: 101-101-0-0 s=255,c=3,t=12,pt=0,l=3,st=fail:1.0
send: 101-101-0-0 s=1,c=0,t=3,pt=0,l=5,st=fail:1.4.1

I do not have a decoupling capacitor to test whether it could solve my issues, but my hum/temp sensor and gateway do not have one either and are still working perfectly. I have tried to find any information on those fail messages, but wasn't successful. Do you have any suggestions?

Jan Gatzke

@schudoel You can have a look at the command line output of openHAB. Just start it via start.sh instead of the init script.

Are you sure your cabling is 100% ok?

schudoel

@Jan-Gatzke Yes, the command line of openHAB is always open. Wiring was okay. I bought some capacitors yesterday and added one 4.7uF to every nrf24l01+, now it is working again :)

Tango2

Not having much linux experience, I'm struggling with getting my serial gateway communicating with openHAB. If I install 1.7.0 in the /opt directory (entirely) this works, however I don't know how to get 1.7.0 installed after having installed 1.6.2 via apt-get - I tried replacing the files in each directory with the updated 1.7.0 files but 1.6.2 runtime is still starting automatically on boot in the openhab.log file.

I'm also reading that 1.7.0 may not be necessary for this to work, however with 1.6.2 running my USB port is not recognized in openhab - is that possibly due to the port speed being set at 115200 like @Jan-Gatzke mentioned above?

@Jan-Gatzke

I am using openHAB 1.6.1 with this rule. Works without problems. You need to compile the gateway with 9600 baud in config.h because openHAB 1.6 has a fixed baud value for the serial communication.

TimO

The support for a baudrate of 115.200, which is used by the MySensor serial gateway, is available since 1.7.0 in the OpenHab serial binding.

You're able to remove the old version with "apt-get remove ...", no need to replace the files. Just use the installation in /opt.

Tango2

Thanks @TimO. I got everything running in /opt (@9600, but I can change that later), and am receiving humidity/temp stats from my one sensor module running on a nano with DHT22 connected. I need to go through and do some major cleanup now, and also figure out how to convert to from F to C for the temp. It seems like the stock code has provisions for that, however I haven't quite figured out how to enable the change yet.

Thanks for the help - I look forward to implementing more of these sensors.

guzzler

I am having trouble getting Arduino Nano detected by Raspberry Pi via USB.

I could see this in the monitor when I selected the correct baudrate:

 0;0;3;0;14;Gateway startup complete.

[151199.509040] usb 1-1.2: new full-speed USB device number 5 using dwc_otg
[151199.612259] usb 1-1.2: New USB device found, idVendor=1a86, idProduct=7523
[151199.612296] usb 1-1.2: New USB device strings: Mfr=0, Product=2,
SerialNumber=0
[151199.612314] usb 1-1.2: Product: USB2.0-Serial
[153464.158413] usb 1-1.2: USB disconnect, device number 5
[153715.311307] usb 1-1.3: new full-speed USB device number 6 using dwc_otg
[153715.414679] usb 1-1.3: New USB device found, idVendor=1a86, idProduct=7523
[153715.414717] usb 1-1.3: New USB device strings: Mfr=0, Product=2,
SerialNumber=0
[153715.414733] usb 1-1.3: Product: USB2.0-Serial

Initially while flashing serial gateway sketch to nano from Mac I had some trouble to get the right drivers. After following this post it worked fine. Is this to do with chinese knock offs?
http://kiguino.moos.io/2014/12/31/how-to-use-arduino-nano-mini-pro-with-CH340G-on-mac-osx-yosemite.html

Also I installed Arduino sketch on Raspberry pi with apt-get install arduino: When I launch Arduino and go to Tools>Port is disabled.

Is there anything I need to do on RPi so it can detect Arduino Nano knock pff?

TimO

I followed the link to the page you mentioned and from there to the chinese page.
There is a zip-file for linux too, maybe you need to install the driver on the RPi too?

http://www.wch.cn/download/CH341SER_LINUX_ZIP.html

Just a guess. :-)

guzzler

Thanks @TimO .

I have been trying to make and load that driver but cannot get hands on 3.12.28+ kernel source. It wont compile without it.

I am wondering how come no body has come accross this issue, I bought my Arduino Nano from one of the links on mysensors store.

http://www.aliexpress.com/item/1-pcs-for-Nano-V3-0-ATmega328P-Module-Board-Free-Mini-USB-Cable-for-Arduino-Compatible/1397847851.html?aff_platform=aaf&sk=3jYZr3nAE%3A&aff_trace_key=23901740799811215&cpt=1431974332161

Jan Gatzke

I don't understand why everybody is using an USB connection for the serial gateway when openHAB is running on a raspberry pi. The pi has a rock stable uart with 3.3V logic. There is no need to convert the arduinos uart to USB. Just connect RX to TX and TX to RX. Connect ground to ground and VCC of the arduino to the 3.3V pin of the pi and you are done. The official openHAB wiki contains instructions on how to use the onboard uart of the pi: https://github.com/openhab/openhab/wiki/Serial-Binding

guzzler

@Jan-Gatzke Thanks for the pointer. I will try that.

I think the reason is lack of understanding. After reading sea of information I am able to pull together the basic architecture of how this would work.

poeml

@guzzler I stumbled over the same issue. The FTDI chip on my Nano is correctly recognized as USB device when I attach it to the Raspi. However, when I reboot the Raspi, the device is not there. I need to unplug and replug it.

That's not normal behaviour of an USB device. And it's quite hindering deploying the Nano as gateway via USB-serial. Maybe it has something to do with automatically performed reset on the Arduino Nano board??

(The hint about attaching directly to serial is great. Noted for later.)

poeml

@poeml more precisely, the Nano's FTDI chip connects to the booting Raspberry, but instead of registering a single device there are 4 (!) log lines claiming registering 4 devices (very funny), and none of the devices are bound.

May 23 23:16:21 bramble kernel: [    3.738087] usb 1-1.5: new full-speed USB device number 5 using dwc_otg
May 23 23:16:21 bramble kernel: [    4.283520] usb 1-1.5: new full-speed USB device number 6 using dwc_otg
May 23 23:16:21 bramble kernel: [    4.768136] usb 1-1.5: new full-speed USB device number 7 using dwc_otg
May 23 23:16:21 bramble kernel: [    5.268161] usb 1-1.5: new full-speed USB device number 8 using dwc_otg

I don't find a way to trigger re-registering the device, or power-cycle the USB port, via software. I can only power-cycle the whole USB bridge, which means that the LED goes out (the Ethernet chip is switched off as well...) and LED goes on again, but with the same faulty registering as when booting.

 # cat reset-usb
#!/bin/bash
echo 0 > /sys/bus/usb/devices/1-1/authorized
sleep 1
echo 1 > /sys/bus/usb/devices/1-1/authorized

Unplugging and replugging always works.

For the record: Raspberry Pi version 2 with the 4 USB ports, just updated to Debian 8.0 (Jessie). I didn't check with Debian Wheezy if it worked then. The Nano was linked from MySensors store I believe and works great otherwise. I have two of them and both have the same problem (or the Raspi's USB stack has the problem, who knows).

gizmosensor

Great tutorial! Thank you for putting this together.

My controller is on RPi, and I'm using a Nano for mySerial gateway with the USB plugged into the RPi. When I specify the port as follows I get the following message

String Arduino "Arduino" { serial="/dev/ttyUSB0@115200" }

org.openhab.model.item.binding.BindingConfigParseException: Could not open serial port /dev/ttyUSB0@115200: Serial port '/dev/ttyUSB0@115200' could not be found. Available ports are:
/dev/ttyUSB0

MySensors.h has the following
#define BAUD_RATE 115200

I tried taking out @115200, I see openhab.log showing it trying to read garbage and the rules failing. So, I', thinking the garbage is because openhab is not reading it with the right baud rate. However, openhab on the RPi doesn't like /dev/ttyUSB0@115200

Any ideas anyone?

Jan Gatzke

Your Version of openHAB is to old. You need openHAB 1.7 to set the baud rate with @xxxxx. Update openHAB or recompile the gateway sketch with 9600 baud in config.h.

gregl

@poeml Just a thought - try connecting the nano to the rpi via a USB hub.

gizmosensor

@Jan-Gatzke That seemed to work. I'm getting readable data now. Thanks!

I also set the nodeId to 15 (The above example assumed it was set to 101), as follows in the sensor

gw.begin(NULL, 15);

I adjusted the mapping accordingly in the mapping, as specified in the tutorial using 15 instead of 101. The following is now being output from event.log

2015-05-31 22:18:33 - livingTemp01 state updated to 22

[Tutorial] openHAB with serial gateway

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