V1.0

Only smaller changes:

• Replace LDO with 3V3 -> 3V0. We loose 1-2dBm of TX power but gain way longer run time. Also the native low voltage protection of Meshtastic

• Make silkscreen a bit bigger

v0.6

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.

v0.5

This fixes a thermal issue with the TI BQ25185:

Power supply tests showed that it's getting extremely hot when working with voltages >6V and a single Via below wasn't enough to get rid of the heat.

V0.4 - Testing

This PCB wasn't yet tested.

I don't expect something dramatically broken as only following changes happened:

• Moved the 4-pin JST connectors to the upper end
• Removed GPIO2 and GPIO8 pin headers as they are not needed for flashing and running the device
• Improved trace width and vias for everything power related
• Measuring VLOAD instead of VLIPO so we can see when the power path is switching to pass-through
• Added transistors for the LEDs