WSAL22342 – RPLIDAR A1/en
Documentation notice: This technical documentation was independently rewritten from an archived supplier source. Check technical details and commands against the product version and manufacturer documentation before use.
Summary
The RPLIDAR A1 is a 360° omnidirectional laser ranging sensor based on laser triangulation. It scans up to 12 m and provides 2D point clouds for mapping, localization, and object detection.
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Technical overview
- Principle: laser triangulation; 360° scan range
- Typical distance range: 0.15–12 m
- Measurement frequency: 8000 Hz (scan rate 5.5 Hz at 1450 points per round, configurable up to 10 Hz)
- Angular resolution: ≤ 1°
- Communication: UART @ 115200 bps, 8N1
- Power: 5 V, typical 100 mA, ~0.5 W
- Mechanical dimensions: 96.8 × 70.3 × 55 mm
- Operating temperature: 0 °C to 40 °C
- Accuracy: 1% (≤3 m), 2% (3–5 m), 2.5% (5–12 m) of actual distance
Notes and version constraints
- The stated 115200 bps applies to the radar itself; the adapter board defaults to 57600 bps – verify before connecting.
- The A1M8 RX input logic is current-controlled; the pin voltage must be at least 1.6 V for reliable signal detection.
- Exact firmware version and compatibility with specific microcontrollers (e.g., Arduino) are not fully specified in the source; verify pinout and level values before wiring.
- The driver files (CP210x_Driver.zip, frame_grabber.zip) are only available via the Waveshare page; their integrity should be verified before installation.
Source and revision record
- RPLIDAR A1 - Waveshare Wiki
- Source revision: 81728
- Captured: 2026-09-03T03:52:18+00:00
- SHA-256:
6af8ce5a1c6729769fe6c801ce265a1c486df775ba94f8c52f4353a58d8d0423