Welcome to EnviroDIY, a community for do-it-yourself environmental science and monitoring. EnviroDIY is part of 
I left it at the “marking” level. Here is your typical CS215 SDI-12 frame with said modification to the lib. I think this is an ADDR request (I decoded it but can’t find my notes anymore).
You can see part of the wake up frame at the beginning then the “long” 100ms wait period.
