sensor monitor and control hardware/firmware for a personal economical fully scalable grow system using a RaspberryPi pico RP2040 and standard off the shelf sensors and components.
It is $3.20, and available from the US Warehouse so shipping lead times are reasonable (2-5 days using their standard shipping method). Free shipping in the US if three parts are ordered.
i2c connectivity board detect and flashing issues after upgrade to pio and arduino 2.0.3 from mbed board variant to https://github.com/earlephilhower/arduino-pico. Resolution in process requires code revision 2v1.