Hi all,

Sensor testing has begun.  I've wired up everything to match Elad's configuration, excluding the problematic O2 sensor.  MicroSD, SHT31-D temp/RH, and DS3231 RTC are initializing successfully. However, the code is getting hung up on the K-30 CO2 sensor startup process.  I've isolated the CO2 sensor and will run test code on this sensor only.

Lars

Beginning Researcher