This is a simple framework to run on a NodeMCU controller. It takes care of configuring the WiFi and provides an easy way to subscribe and publish MQTT messages (handling all the possible errors by reconnecting).

I will probably run multiple NodeMCUs in the future. To make it easier, they will all receive the same lua files, but each one will run a specific app_*.lua

Which NodeMCU is responsible for what is configured in the nodenames table of config.lua - the node.chipid() is used to figure out where we run.

The config.lua also contains some basic setup for the WiFi and the MQTT broker.

Passwords have to be placed in a secrets.lua, see the dist file for the format.

The wifi setup has a g.wifi.waitThen() method accepting a callback that will be run only after an IP address has been assigned. You will probably want to wait fo that befor starting the MQTT client.

See app_balcony.lua for an example application. It allows the control of a water pump via MQTT. However the pump will not run when the water level is too low.