A suggestion please

Configuration
1

I have developed a small network of (kinda-lora) nrf24l01 with mqtt endpoint working, but sometimes (3%-5%) the packet is lost.

Everything works fine, graph would be better using bezier curves, instead of lineal, but great anyways. Now it’s my turn to implement thermostat. So i need a reliable way to get SURE the heater turns on/off, despite of possible packet loss.

The idea/question/target is: An automation that calls a command (turn on/off heater) every X minutes depending on a hass thermostat value.

So, THANKS !!!

Keep up the great work ppl.

2

might sound silly but if you’re using MQTT, up the QoS level?

3

The mqtt is meant to expose received values, the output to antenna is via shell command (at the moment)

4

so shell command to send the command/request and MQTT to confirm state?
Guess create a loop that sends the command, waits for [say] 1 sec and reads the MQTT state, and if state is wrong, run again?

5

Not a bad idea… Easy and interesting.

But it has a downside: If the receiver if out of service for a few minutes it will fail.

The idea is a X minutes cycle sending the command, and maybe stop the cycle when mqtt value changes. And of course, the command must be different depending on a thermostat. And to handle everything via Hass.

So your idea can be useful, but ¿can be improved? and ¿can we do it via Hass?

Thanks

6

yes though if it’s offline you can then add a clause in your loop to notify you of such a failure and break/exit the loop?

7

It should work, not so neat, but should work.

8

When the communication is good the mqtt is set.

¿What about using?:

1- Thermostat
2- MQTT Binary Sensor (read remote state)
3- Automation/s

Pseudocode-like condition for automation:

automation:
  -alias: 'refrescar_temperatura1'
    trigger:
      platform: time
      minutes: '/2'
      seconds: 00
	- condition: template
        value_template: (if thermostat.status is 'on') and (mqttBINsensor.state is 'off')
    action:
      service: shell_command.do_something_cool

Template is wrong, i know, but is the general idea factible?

Thanks.

1 Like
9

sounds ok, but what is the status of the mqttBINsensor if there is no connection? Is i still off?
Have you set the availability topic to track whether your mqtt device is online or not? That could be something to use?
your value_template should be:

	- condition: template
        value_template: {{ is_state('thermostat.status', 'on') and is_state('mqttBINsensor.state', 'off') }}
1 Like
10

:heart_eyes::heart_eyes:

Thanks, will code everything this weekend.