Meshtastic adds tilt telemetry support for LIS3DH accelerometers
Tilt telemetry for LIS3DH mounts could turn Meshtastic nodes into knock-over and tamper alarms, not just fixed radios.
A solar repeater that tips over, a vehicle node that takes a hard jolt, or an asset box that gets moved could soon send that motion straight across the Meshtastic mesh. On June 25, pacmac opened PR 10787, Add TiltTelemetryModule for LIS3DH accelerometer mounts, on the firmware pull request list.
The hardware piece is the LIS3DH, a triple-axis accelerometer with built-in movement detection, including free-fall detection. That gives Meshtastic a path to report orientation and motion state instead of treating every sensor input as a simple on or off event. It would extend Meshtastic’s existing Telemetry Module, which already carries device, environment, air-quality, and health metrics and auto-detects supported I2C sensors at startup.
Meshtastic already has a separate Detection Sensor Module for GPIO-based motion, reed switches, and other open or closed state systems, and that module is available in app versions 2.2.2 and higher. The new tilt work would sit in a different lane. Rather than just tripping an alarm when a pin changes state, it would let a node describe what it is seeing, including tilt, movement, or a shift out of alignment. For field builds, that opens use cases: a mast-mounted relay that warns when it has been knocked loose, a vehicle-mounted node that reports shock, or a trail-side box that flags tampering before the battery dies.
A motion-telemetry request for the LIS3DH and RAK1904 accelerometer line was opened on April 19, 2025 and later closed as not planned, and an April 2024 firmware discussion about an accelerometer feature ruled out raw telemetry for high-rate sensors. Meshtastic only supports slow-changing or averaged data. Mounting quality will matter, loose enclosures can create false triggers, and every extra wakeup or report will press harder on battery life.
Meshtastic is an open-source, off-grid decentralized mesh network for affordable, low-power devices, and its device roles include SENSOR for telemetry-heavy deployments alongside REPEATER and ROUTER for infrastructure nodes.
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