Special cases that fit well to the Heltec WiFi Kit 32 V3 and the Project SPIDR:
https://github.com/marxram/spidr/tree/main
Project Brief:
The S|P|I|D|R Project project aims to provide a simple and effective solution for bridging data between your solar-inverter and you smart home or 3rd party applications. The easy way would be to just deliver the data to a local mqtt broker as a well-known data inteface.
The author remixed this model.