Domoticz TEXT sensor triggering

[gohan]

You could use a binary switch on the node that you can trigger to have the node request the text value you want. Not the ideal solution but it would just require a minor change. Otherwise you would have to start bothering the domoticz developers 😁

[Sushukka]

@gohan True...I'm just trying to find a way to avoid that darned dummy switch here and there mess. Have been playing with them too much lately. Domoticz developers seems to be also pretty slow to react to any suggestions. Ok, I don't pay to them, but HA and OpenHAB feels a bit more active nevertheless. Probably need to go the dummy hack path again, sigh. Probably have to change the controller soon as every this type of hack makes the conversion even harder in future.

[gohan]

Life sucks, I know 😁

I see your point, my suggestion was merely a workaround to the node running but if you foresee domoticz limitations a problem for the future, maybe it could be worth moving to another controller now that you don't have too many nodes around

[tbowmo]

@sushukka

you could try the different controllers out, checking their capabilities.

For my part, I switched off domoticz more than one month ago, after I had converted my limited automation scripts over to node-red. Today I deleted the domoticz docker container as well.. No need for it to take up disk space :) I have kept the configuration volume for domoticz, so I can spin up a new instance of it in minutes..

[monte]

@sushukka You can use netcat or socket connection from python script to send message directly to mysensors GW, omitting domoticz. Then you can link this script to your dummy switch in domoticz. It works.

netcat:

netcat <gw ip> <port>

python:

#!/usr/bin/python3

import socket
from time import sleep

def gwsend(hostname, port, content):
    s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    s.connect((hostname, port))
    sleep(1)
    s.sendall(content)
    s.shutdown(socket.SHUT_WR)
    s.close()


string = str.encode("some text")  # Your TEXT message
gwsend("127.0.0.1", 5003, b"2;1;1;1;47;" + string + b"\n")

[Sushukka]

@gohan said in Domoticz TEXT sensor triggering:

Life sucks, I know 😁

I see your point, my suggestion was merely a workaround to the node running but if you foresee domoticz limitations a problem for the future, maybe it could be worth moving to another controller now that you don't have too many nodes around

Around a hundred sensors now and growing...not very excited of the conversion work... :confused: However, started some planning already and now MySensors GW is converted from serial to W5100/MQTT and Node-red has been installed. Have had plans to test it for a some while, but now really started playing with it. Seems that you can do all kind of nice middle-level stuff with it. :muscle:

Plan now is to test some other controller via MQTT but only by subscribing to the MySensors queue.

Also interesting to hear that people have switched totally to Nodered ( @tbowmo do you still have some controller or just Node-red gui/dashboard). Is there some ready-made interpreters for MySensors messages or need one define them all manually?

And @monte, I definitely think your solution is the coolest one...but I know that if I take this alluring path, I'll end even deeper with the domo hacking I want to get rid off. :grin:

[tbowmo]

@Sushukka

I have switched completely to nodered, my automation is done in flows (you can check it out on github).

There is a set of mysensors nodes for nodered, that decode / encode MySensors serial protocol, and MySensors MQTT topics, and also enables you to create dummy mysensors nodes, and inject that data into your streams, they can be found on the forum here, or on npmjs.com.

What I do not have, is the ability to hand out new node-id's (yet) I am investigating how to do that in a sensible way, so that data is persisted across restarts / re-deploys of node-red.

[Sushukka]

@monte I need to move to a next project so before conversion to Node-red and/or OpenHAB, how would you use netcat type of injection with MQTT? I mean now I have MySensors in W5100/MQTT mode and I want to send an update to my V_TEXT sensor via MQTT. Easiest way to do this with Domoticz would be by triggering some script. Sending an MQTT update via Python is probably easy (dunno, haven't done yet), but I have no idea how to form the message so that it would be in correct MySensors format...My node id is 31 and the text sensor child is 1:

#define MY_NODE_ID     31
#define LED_MODE_ID     1 
MyMessage msgLedMode(LED_MODE_ID, V_TEXT);

The payload is some number between -1 to 56. Really appreciate your help. :relieved:

[monte]

@sushukka I have limited knowledge of mqtt, I'm not using it in my setup, with ncat you can only talk directly to tcp/udp socket and mqtt is built above it. But there is mqtt library for python, and guides for using it. http://www.steves-internet-guide.com/into-mqtt-python-client/ try to follow those steps, I will try too :)

[tbowmo]

@Sushukka

mqtt publish example in python

import paho.mqtt.publish as publish
payload = 'Hey there'
publish.single('mys-out/1/1/1/0/47', payload, hostname=<mqtthost>, port=<mqttport, retain=False)

'mys-out/99/1/1/0/47' is the MQTT topic, and is decoded as follows:
99: Node ID
1: ChildId
1: command (Set in this case)
0: ACK (None in this case)
47: V_TYPE (V_TEXT in this case)

Above pretty much follows the MySensors serial protocol, as found here, only difference is that sensor payload, and sensor id / msg type etc. is split into two parameters in MQTT (as in payload and topic), and doesn't come in as a single string.

[pjr]

How about presenting additional S_BINARY/V_STATUS in your node. In domoticz when text changes set this to ON/OFF. From there you now its time to request text from domoticz.

[gohan]

That's what I suggest 2 days ago 😁

[kimot]

I think, all this is not Domoticz problem, but mysensors problem.
Mysensors gateways has not got any universal input interface.
This is, why I am not using pure mysensors solution.
Imagine, that your gateway understood something like this:

http://MS_GATEWAY/cmd?node=10&sensor=1&value=80

And translate it to mysensors network message, which sends value 80 to sensor number 1 of node number 10.
Then you can send into your node everything not only from Domoticz, but from simply Android application and etc.
With ESP8266 gateway you need only "ESP8266HTTPClient" library to parse this http call for example.

[gohan]

If the node requests the TEXT to domoticz, it gets the value, so domoticz can actually handle it, the problem is that it does not send the TEXT value if something changes the variable but only if the node requests it.

[monte]

@kimot then it would be a controller itself, not a gateway. You need gateway anyway (sick rhyme), or you would need to use only powerful enough hardware to implement web server to handle requests as you suggest. But it wouldn't be backward compatible with arduino gateways, thus it's not the way for now, maybe in the future we will come to it.

[kimot]

@gohan
But this is what I wrote.
If anything changes in Domoticz ( not only TEXT value, but anything ), Domoticz sends http call into gateway and thats all.
For example - you changed setpoint in Domoticz and it seds it immediately into mysensors gateway.

[gohan]

But that's out of mysensors protocol and making it an even more complicated workaround

[kimot]

@monte
It can be implemented into existing ethernet gateways, I think.
I experimenting with ESP8266 gateway only, not W5100.

For inspiration look at code line 24 to 56 here:

https://diyprojects.io/driving-gpio-esp8266-web-server-domoticz-tcp-ip-wireless/

[monte]

@kimot I know, that you can make web server on esp8266, but now gateway code works on almost everything that is supported by arduino IDE and has enough memory. If you will make version of gw that only works on esp or raspberry pi it won't be right. For my taste we need affordable microcontroller based on ARM Cortex-M0 (M3, M4) with built-in Ethernet controller and hardware TCP/IP stack. For now there is one chip but it isn't nor affordable nor widely spread, and almost no one knows how to work with it (because no one has it). http://www.wiznet.io/product-item/w7500p/

[Sushukka]

@tbowmo Thanks @tbowmo and everybody! This active community has really saved my day so many times. You rule guys and gals! :+1: :blush:
Here is a working script:

import paho.mqtt.client as mqttClient
import sys

irCommand = sys.argv[1]
print("Parameter is: " + irCommand)

client = mqttClient.Client("Python")  
client.username_pw_set(username="xxx",password="xxx")
client.connect("nnn.nnn.nnn.nnn", 1883)
client.publish('domoticz/out/HomeNum_IR/0/0/1/0/47', irCommand, retain=False)
# (ESP8266 "gateway" MQTT client -> node=0)

And call it from Domoticz virtual selector switch:

script:///home/pi/domoticz/scripts/python/hnumber_led_mode.py 7

Parameter is the desired mode for led animation. Made a similar on for IR remote commands.

Is there same ~25bit payload limit with MQTT too? I mean those NEC IR commands tend to be 32bit so probably cannot send them directly but need to be hardcoded in the sketch? Also planned to create a universal script for these needs where you could give also node number, child ids etc but then again...I chain myself even tighter to Domoticz shackles and again Domoticz should support this without scripting.

Couple of more questions:

• If you have several ESP8266 MQTT gateways, should one create a different topic for everyone or put them in the same MySensors queue? If so, will the MY_MQTT_CLIENT_ID make the separation?
• I installed nodered-contrib-mysensors and it seems very promising. Definitely going to play around with it. I probably still need some actual controller but Node-red seems to be important part whatever you're gonna do especially when using MQTT queues.
• When using MQTT instead of Ethernet GW, I lose small but very important check: node pinging. I can see from Domoticz log warning messages when some of my ESP8266 Ethernet nodes are down, but when using MQTT there are no warnings, just no data received. I assume this is quite logical because the MQTT node's address in Domoticz is actually broker's (Mosquitto) address + right MQTT topic. However, when sniffing Domoticz MQTT traffic, it seems to send PING messages quite regularly (but don't know if this triggers anything if the ping success or fails...):

// MQTT topic: domoticz/out/HomeNum_IR/#
PING
qos : 0, retain : false, cmd : publish, dup : false, topic : domoticz/out/HomeNum_IR/0/0/3/0/18, messageId : , length : 40

Update: Seems that the Domo has it's own requirements for MQTT queues and for preventing overlapping ESP8266 = GW = Node ID 0 have an option to have also Node ID in the MQTT queue definition. Still would be nice to be able to define the MQTT queue names freely in Domo...

Also my bad: MySensors payload size is 25 bytes, not bits... This seems to be because of NFR24L01 limitations. However, it would be nice to see an extended payload size for passing eg. longer text information with more advanced microcontrollers like ESP8266 in the future releases. Minor need though.