Main HA instance -> Second RPi switching GPIO pins on for 6 seconds

Configuration
1

OK, I need some help and advice from the community please?

I am trying to run a curtain/blind motor for 6 seconds and show the status (open/closed) in HA

This is what I have:

  1. Main HA instance running HASSIO 80.3 on RPi3
  2. Second RPi with a relay attached to the GPIO pins to drive the motor

I have a scenario where I need to achieve the following:

A) On the Main HA, a switch/item to show the status (open/closed)
B) Main HA need to trigger the GPIO on the second RPi for 6 seconds
C) [Optional] Persistent state of open/closed to ‘remember’ state even after a reboot of HA

Does anyone have any suggestions on how to do this?

Not concerned what OS is running on the second RPi, but HASSIO would be preferred.

Any thoughts?

2

You could run this project, and send it MQTT messages. The /set_on_ms topic seems to do what you need for turning the gpio on for a certain length of time.

Edit: On second thoughts, it doesn’t seem to send a status message back, so maybe not such a good idea.

3

Ah, I did not realise that you can actually SET something using MQTT - I thought it was just a way to GET information. I will have a look into this, maybe just ahve another HASSIO instance as the second RPi and control it that way?