Hello all. Have a question for the hive mind. I know I’m overthinking this. I have home assistant setup in a converted cargo trailer/ camper. I’ve been able to use esphome for a lot of the connections between this and that. What is left is starting and stopping a generator that has a push button start. Basically I need it to see if the generator is running (easy to do with the inverter monitoring that is already setup) and if it is, close a contact (basically push the button) for a few seconds and wait to see if it detects power coming in. If there is, it’s done, if not, close the contact again and repeat the process. I also need it to close the same contact for 30 (I think) seconds when I want to shut it off or the batteries show a specific state of charge. The connections to the esp32 are what has me stumped. The code should be pretty simple. I have a bunch of Wemos D1Mini’s. This should be easy, right???
Yes, it is very much possible. I have setup something similar for my friend. use GPIO switch with 30s time delay to make it as push button which in turn triggers a right sized relays. I am using 30A relay boards for this purpose since I am starting a 2HP pump. Refer here.
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If you don’t want to study the electronics of your generator logic board, just use a small relay module to close the button contacts.
Another option is to measure the voltage of the logic board and verify if button is switching low or high side…
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Would you be willing to provide some sample code?
It works! Here is tthe codde I used after all the standard ESPHome stuff. THANK YOU!
output:
- platform: gpio
pin: GPIO22
id: gpio_d1
switch:
- platform: output
output: gpio_d1
id: relay1
name: “Gen Start-Stop”
icon: “mdi:generator-mobile”
on_turn_on:- delay: 3500ms
- switch.turn_off: relay1
Good to hear it has worked for you. 