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WSAL18301 – TOF Laser Range Sensor/en

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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

Technical guide for the Waveshare TOF laser range sensor: measurement range 1 cm to 5 m, resolution 1 mm, update rate 10 Hz, UART/CAN communication and multi-module cascading.

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Technical overview

  • Core technology: time-of-flight measurement using 940 nm near-infrared light; distance is derived from the travel time between emission and reflection.
  • Measurement range 1 cm to 5 m with 1 mm resolution and a 10 Hz update rate.
  • Communication via UART or CAN (shared connector type); default baud rates are 921.6 kbit/s for UART and 1 Mbit/s for CAN.
  • Two output modes: active output (single module only, 10 Hz) and query output (usable in cascade setups).
  • Cascading support: up to 8 modules over UART and up to 7 over CAN; each module has a unique ID.
  • Adjustable field of view (FOV): 15° to 27°, offset -6° to +6°; smaller FOV improves short-range precision but reduces maximum range.
  • Power supply 3.7–5.2 V with reverse-polarity protection; power consumption approximately 290 mW.
  • Ambient-light resistance is limited (~10k LUX), so the sensor is primarily intended for indoor use; strong ambient light can degrade accuracy.
  • Distance status codes (e.g., 0 = valid, 14 = invalid) allow additional data processing beyond the raw distance value.
  • Indicator LED: fast flash (0.1 s interval) during startup/firmware update, slow flash (1 s interval) in normal operation.

Notes and version constraints

  • The source does not provide explicit command lines or API calls, so the “commands” array is intentionally left empty.
  • Specific firmware version details, exact microcontroller compatibility lists, or platform-specific integration notes are missing – verify before deployment.
  • Cascaded wiring requires careful power-supply layout to avoid voltage drops along the chain (see the FAQ entry on cascading).
  • Strong sunlight or very bright environments may reduce measurement accuracy.
  • All values above come from supplier material; confirm them with your own testing before making product decisions.

Source and revision record

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