Motorola battery reader

Development of open wireless Motorola IMPRES battery reader (gen 2 batteries)

Each battery have two chips: DS2433 (1Wire EEPROM) and DS2438 (1Wire battery monitor).

In folder images you can find some prototype assembly images.

File /dev/Dumps.md contains raw DS2433/DS2438 battery chip dumps with the referenced OTA data.

Firmware installation

• Clone repository
• Install dependencies (WiFi, WiFiMulti, OneWire, HTTPClient)
• Copy settings-example.h to settings.h and edit it
• Upload firmware via Arduino IDE or Arduino-CLI

Hardware

• Cheap chinese IMPRES (not really) charger
• ESP32 devkit
• 5V DC/DC
• Wires, resistors

Software

For parsing battery data you can use BMS class from the rick51231/node-dmr-lib (Services.BMS.fromBatteryChip)

TODO list

• Provide hardware assembly instructions
• Provide schematic
• Provide battery information and pinout
• Add 1-Wire bypass mode to work with original IMPRES BatteryReader software
• Make own PCB