SPD1200N4 · 905 nm Laser Rangefinder Module
SPD1200N4 UART wiring, pinout and serial protocol
The SPD1200N4 talks UART-TTL (customizable) @ 115200 bps (default) and is powered from 3.3–5 V. 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-TTL (customizable) | SPD1200N4 controlled source technical table |
| Baud rate | 115200 bps (default) | SPD1200N4 controlled source technical table |
| Supply voltage | 3.3–5 V | SPD1200N4 controlled source technical table |
SPD1200N4 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 SPD1200N4
The published single-unit price of the SPD1200N4 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: SPD1200N4 model page.
FAQ
What is the maximum range of the SPD1200N4?
The published range is Catalog range 0.2–1,200 m. A 1,500 m night-time figure appears in the source under special conditions and is not a guaranteed range. (SPD1200N4 controlled source technical table; strong sunlight or low visibility may reduce range). 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 SPD1200N4 use?
The published communication interface is UART-TTL (customizable) @ 115200 bps (default).
What laser wavelength does the SPD1200N4 use?
The published wavelength is 905 nm ±5 nm; laser safety entry: IEC Class I.
How much does the SPD1200N4 cost?
The published single-unit price of the SPD1200N4 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
- SPD1200N4 datasheet and specifications
- SPD1200N4 Pixhawk / ArduPilot setup
- SPD1200N4 ROS 2 driver
- SPD1200N4 Arduino library
- SPD1200N4 Raspberry Pi Python reader
- SPD1200N4 price and ordering
- SPD1200N4 power supply and current
- SPD1200N4 accuracy and range test conditions
- SPD1200N4 dimensions and weight
- UART laser rangefinder modules
- 905 nm laser rangefinder modules
- Class 1 laser rangefinder modules
- gimbal and payload laser rangefinder modules
Model records
Open the model page for the full specification table, downloads, published price and ordering.