Bigger board changes this time:
- Lots of smaller non-functional changes reducing trace lengths to a minimum
- Replaced the CR123A battery with a classic 18650. The market of cheap CR123A 3.7V was just too small.
- Added a second I2C and also use proper Pull-Ups
- Using a thermistor with long legs instead of the SMD variant. This will be needed for temperature monitoring of unprotected LiPos
- Reduce jumpers to GPIO9 and ENABLE
Hopefully all bigger changes are done now - this one will be properly tested and then promoted to stable v1.0.0. Expect semantic versioning after this one.