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BatteryMonitor

Logs battery voltage and current to GCS, warns on low cell voltage.

Version	1.0.0
Date	2026-05-18
Min firmware	4.5
Vehicle	copter, plane, rover

/lua_ardupilot_scripts/tools/BatteryMonitor.lua Download .lua

BatteryMonitor

Description

BatteryMonitor periodically reads the primary battery instance and sends voltage, per-cell voltage, and current draw to the GCS. It sends an additional warning message when the per-cell voltage drops below a configurable threshold.

Setup

Copy BatteryMonitor.lua to APM/scripts/ on your SD card.
Ensure a battery monitor is configured (BATTx_MONITOR ≠ 0).
Adjust the WARN_VOLTAGE and CELL_COUNT constants at the top of the script to match your battery pack.

Parameters

Constant	Default	Description
`UPDATE_INTERVAL_MS`	10000	How often to report (ms).
`WARN_VOLTAGE`	3.5	Warning threshold in volts per cell.
`CELL_COUNT`	4	Number of cells in series.

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