50m TOF Laser Distance Sensor

The ToF laser distance sensor from DFRobot measures distances from 0.05 to 50 m with direct time-of-flight measurement (dTOF) and a 905 nm laser. The accuracy is typically ±3 cm, the measuring rate 100 Hz, and according to DFRobot ambient light up to 100000 lux does not disturb it. The narrow measuring cone of 1 to 2° allows pinpoint measurements. Output is via UART, I2C or a switching output; according to DFRobot the module is a TOFSense F2P.

Important: DFRobot changed the cable colours once. According to the wiki, red is VCC, black GND, blue RX/SDA and green TX/SCL today; on older cables red and black are swapped, and the product page still states red GND and black VCC. Check the pin assignment on the sensor before the first connection.

Recommended Accessories:

• FT232 USB to TTL Module

Features:

• Measuring range 0.05 to 50 m, depending on the reflectivity of the target, blind zone below 5 cm
• Typical accuracy ±3 cm, resolution 1 mm, 100 Hz
• 905 nm laser, measuring cone 1 to 2°, ambient light up to 100000 lux
• UART (active or on request), I2C (address 0x80, several modules on the bus) or switching output with threshold
• Settings with the PC software only in UART mode; a USB-TTL converter is required for this (DFRobot)
• To reset to UART, DFRobot describes a procedure with a USB-TTL converter (for example CP2102) and 921600 baud

Application Examples:

• Obstacle detection and navigation for robots and automated guided vehicles
• Altitude hold and landing aid for drones
• Fill level and position in storage and conveyor systems
• Distance measurement in traffic and car parks

Documentation:

• Wiki DFRobot SEN0648
• Example UART active output with ESP32 (DFRobot Wiki)
• Example I2C (DFRobot Wiki)
• Example I/O output (DFRobot Wiki)
• Datasheet (PDF)

Technical Data:

• Manufacturer: DFRobot
• Manufacturer SKU: SEN0648
• Measuring principle: dTOF, 905 nm laser
• Measuring range: 0.05 to 50 m
• Accuracy: ±3 cm (typical)
• Resolution: 1 mm
• Measuring rate: 100 Hz
• Measuring cone: 1 to 2°
• Ambient light: up to 100000 lux
• Operating voltage: 4.3 to 5.2 V DC
• Power consumption: 250 mW
• Interface: UART, I2C (0x80), I/O
• New cable colours: red VCC, black GND, blue RX/SDA, green TX/SCL
• Laser class: 1 (from previous text)
• Operating temperature: -10 to 60 °C
• Dimensions: 22.7 × 28.0 × 13.6 mm
• Weight: 7.5 g

Scope of Delivery:

• 1× ToF laser distance sensor 50 m
• 2× connection cable