This is a simple PCB that combines an ESP8266-01 and a buck voltage converter set for 3.3V. The ESPHome code simply connects to the local WiFi when in range. The project came about because I connected my garage door opener to Alexa and I wanted to not let the doors open if the associated vehicle was not in WiFi range.
In Home Assistant: I have an ESP01 in my Jeep that I use for presence. If the ESP connects, then the Jeep is present. I use a binary helper that I turn on on the dashboard that is basically a semaphore to tell the ESP that I want it to not go to sleep. The test_ota script in the code below is where this is tested when the ESP boots.
The sequence is:
- Turn on OTA mode.
- Wait for the sleep period to end, then the ESP reboots and will not go to sleep.
- Perform my OTA upload.
- Turn off the OTA mode.
- Press "Restart" on the dashboard to reboot the ESP.
