GPIO on RPi4 vs ESP32+MQTT

[tomansi]

Before making a decision for a new setup, I'd like to weigh the pros and cons of placing the sensors and controllers on the Raspberry Pi's GPIO pins versus external ESP32s sending data via MQTT (does INDI-allsky incorporate the data and handle it as if it were native?).

Which option is recommended?

Thank you very much for your opinions.

[aaronwmorris]

It is possible to use sensor data published via MQTT for temperature values to control a fan/dew heater.

https://github.com/aaronwmorris/indi-allsky/wiki/Sensors#mqtt-broker-sensor

I think it really just comes down to preference and how complex you want to make your system. Many people that use sensor data from an MQTT broker is because they already have an external weather station.