ATS-20+

SCHEMATICS

ats-20_plus_schematic.pdf

FIRMWARES

ATS20_EX

https://github.com/goshante/ats20_ats_ex

ATS 20 STARTER PACK

https://github.com/patomoi/ATS-20-Starter-Pack

ATS20_EX FIRMWARE BATTERY % MOD

Source : https://www.reddit.com/r/HamRadio/comments/1fi16ls/ats_20_ats_ex_firmware_adding_the_battery_level/