Hi there,
Awesome as per usual with the Power Nija 
I donāt see the usefulness of the C3, always felt like it was the red headed step child, The S3 is the āShazzizleāmy-nizzleā 
imo. I/O for days B2B connector and Power sipping through a straw, smooth.
I wonāt pull a c3 out for anything unless itās on a grove expansion board with the added flash chip installed.
C6 is still getting the treatment. so stay tuned.
GL 
PJ
I would say no @cgwaltney on the BLE radio doing and Battery diags, there is a software battery gauge library , kinda smoke and mirror perfect world stuff IMO, based on internal battery resistance etc.
