Hey All,
So I have HA running on an Ubuntu 18 machine as I could not get the Pi Zero version of Hassio working. I am using an Arduino Uno for the DIY smart home gear and want to use a DHT11 sensor with it but I can’t use it with HA’s Arduino component. So my next thought was to use the pi with MQTT on it but I could not get it working.
The arduino component uses the firmata firmware, which appears to support dht11. Also it is not restricted to pi, so I am not sure where you are getting your info.