BatRay by ClearEvo.com - JK BMS battery monitor over Bluetooth, in Chrome

DEMO - simulated JK BMS, not a real battery

Disconnected

Press Connect and pick your JK (JiKong) BMS in the Bluetooth chooser - readings stay on your device.

Needs Chrome or Edge with Bluetooth (Android or desktop). The chooser lists every nearby Bluetooth device - pick the BMS (JK units often advertise a plain name).

Debug raw frames - check these if the numbers look wrong

Cell voltages bar height exaggerates the spread: scale runs from the lowest cell - 50 mV to the highest + 50 mV

More same frame as the meters, not covered by the cell-sum check; offsets verified against captured frames from 24-cell, 32-cell and JK-PB firmware (see how to use)

BMS settings as configured in the BMS (read-only here)