LRF1200A1 · 905 nm Laser Rangefinder Module
LRF1200A1 UART wiring, pinout and serial protocol
The LRF1200A1 talks UART, 3.3 V TTL and is powered from 3.3 V ± 0.1 V (one older section says 3.3–5 V; confirm before wiring). Wire TX to the host RX, RX to the host TX, share ground, then send one of the commands below.
Electrical interface
| Parameter | Published value | Condition / note |
|---|---|---|
| Interface | UART, 3.3 V TTL | |
| Supply voltage | 3.3 V ± 0.1 V (one older section says 3.3–5 V; confirm before wiring) |
LRF1200A1 serial commands
Frame header 55 AA, 8-byte frames, 115200 baud, 8N1. The full frame layout and checksum are in the protocol document of erdi-lrf-drivers.
| Command | Bytes to send (hex) |
|---|---|
| Single-shot ranging | 55 AA 88 FF FF FF FF 84 |
| Continuous ranging | 55 AA 89 FF FF FF FF 85 |
| Stop ranging | 55 AA 8E FF FF FF FF 8A |
| Angle measurement | 55 AA 8A FF FF FF FF 86 |
Reading it from a computer
Open the port at the baud rate above, 8 data bits, no parity, 1 stop bit. The UART protocol decoder shows the frames live in a browser over WebSerial, and the erdi-lrf-drivers repository has Python, Arduino and ROS 2 readers for this frame format.
Ordering the LRF1200A1
The published single-unit price of the LRF1200A1 is $90, falling to $35 per unit at the largest published quantity band. Prices include shipping and are ordered directly from erdilrf.com. Technical questions and quantity quotes: tommy@erdimail.com. Full specification table, downloads and ordering: LRF1200A1 model page.
FAQ
What is the maximum range of the LRF1200A1?
The published range is 5–1,200 m (Building target; the source table gives ≥5–1200 m.). A range figure is only comparable together with the target and conditions it was measured on, so the condition is listed next to the value.
Which interface does the LRF1200A1 use?
The published communication interface is UART, 3.3 V TTL.
What laser wavelength does the LRF1200A1 use?
The published wavelength is 905 nm; laser safety entry: Class 1 (source panel inconsistent; confirm).
How much does the LRF1200A1 cost?
The published single-unit price of the LRF1200A1 is $90, falling to $35 per unit at the largest published quantity band. Prices include shipping and are ordered directly from erdilrf.com.
Related guides
- LRF1200A1 datasheet and specifications
- LRF1200A1 Pixhawk / ArduPilot setup
- LRF1200A1 ROS 2 driver
- LRF1200A1 Arduino library
- LRF1200A1 Raspberry Pi Python reader
- LRF1200A1 price and ordering
- LRF1200A1 power supply and current
- LRF1200A1 accuracy and range test conditions
- LRF1200A1 dimensions and weight
- UART laser rangefinder modules
- 905 nm laser rangefinder modules
- Class 1 laser rangefinder modules
- gimbal and payload laser rangefinder modules
- security and perimeter monitoring laser rangefinder modules
- industrial and level measurement laser rangefinder modules
Model records
Open the model page for the full specification table, downloads, published price and ordering.