CJMCU-131 - MQ-131 Hi - I saw the posts regarding this O3 sensor - and yes I have the PDFs + schema. But: The datasheets describe the "naked" MQ-131 sensor - on the CJMCU-131 board I can see UART (Rx/Tx) pins (in addition to the pure analog pins). I could not find anything how to talk to t...