The CO2METER LP8 SE-30 module requires a CPU, a supercap, a Li battery, and support components. Rudimentary software exists which interfaces the SE-30 to an Arduino MEGA. The plan: get the system working on the MEGA, then port to the Adalogger. Features to add include data logging, efficient sleep and startup routines. The batteries will automatically recharge when the system is plugged into a USB port.
The CO2 sensor vendor's Application Note ( CO2meter.com AN162 "
Connecting SenseAir’s LP8 CO2 Sensor to Arduino via UART" has text Arduino code. Upon copying the code into the Arduino IDE, I discovered that parens and curly braces did not match up, and there is a serious issue with line endings.
Compiling produced lots of errors. After spending several hours attempting to edit and compile, I contacted the folks at CO2meter.com, and a very helpful tech sent me a couple of files of Arduino code. The code compiled, but I wasn't able to get a response from the sensor.
Hooked up the o'scope, and discovered I had made an old and familiar mistake: had accidentally transposed TX and RX.