SPD1200N3 · 905 nm Laser Rangefinder Module
SPD1200N3 UART wiring, pinout and serial protocol
The SPD1200N3 talks UART, 3.3 V TTL; customizable @ 115200 bps and is powered from DC 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, 3.3 V TTL; customizable | See the controlled model document |
| Default baud rate | 115200 bps | See the controlled model document |
| Supply voltage | DC 3.3–5 V | Does not imply 5 V tolerance on serial inputs |
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 SPD1200N3
The published single-unit price of the SPD1200N3 is $95, falling to $37 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: SPD1200N3 model page.
FAQ
What is the maximum range of the SPD1200N3?
The published range is 3–1,000 m (Building target; visibility ≥10 km; humidity ≤60%). 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 SPD1200N3 use?
The published communication interface is UART, 3.3 V TTL; customizable @ 115200 bps.
What laser wavelength does the SPD1200N3 use?
The published wavelength is 905 ± 5 nm; laser safety entry: IEC Class 1 stated in the ranging specification.
How much does the SPD1200N3 cost?
The published single-unit price of the SPD1200N3 is $95, falling to $37 per unit at the largest published quantity band. Prices include shipping and are ordered directly from erdilrf.com.
Related guides
Model records
Open the model page for the full specification table, downloads, published price and ordering.