JK BMS Monitor

JK BMS Monitor connects to your JK (Jikong) battery management system over Bluetooth LE and shows what your battery is doing — reliably. It was built as a replacement for the vendor app, with a focus on the things that matter when you actually depend on the data: • Automatic reconnection. A dropped link is re-established on its own, and a watchdog forces a reconnect if the BMS goes quiet. The last readings stay on screen while it does, instead of the app going blank. • Status: state of charge, pack voltage, current and power, charge/discharge MOSFET state, balancer state and current, heating, temperatures (MOS and sensors), state of health, cycle count, runtime — and a prominent alarm card whenever the BMS reports a problem. • Cells: every cell voltage on a stable scale (at least 100 mV around the pack midpoint, so noise on a balanced pack doesn't make the bars jump), min / max / average, cell delta, wire resistances. • Settings: read and change the BMS protection limits, balancer parameters, capacity and the charge / discharge / balancer switches. Editing is locked behind a risk notice; every change is confirmed and re-read from the BMS. • Log: the event log the BMS keeps in its own memory, with the age of each entry. • Info: model, hardware and firmware version, serial number, manufacturing date, uptime, power-on count. Supported devices: JK BMS units with the Bluetooth (JK02) protocol, both the 24S layout of older hardware and the 32S layout of newer hardware and the PB model family. The layout is detected automatically. Privacy: the app has no network access. Nothing is collected, nothing leaves your phone. It only remembers the last BMS you connected to. Important: changing BMS settings can damage your battery or connected equipment. Do so only if you understand the values; you use this feature at your own risk. Not affiliated with Jikong / JK BMS.