LR1200D23 · 905 nm Laser Rangefinder Module
LR1200D23 UART wiring, pinout and serial protocol
The LR1200D23 talks UART - TTL, customizable @ 115200 bps and is powered from 3.3 V – 5 V (recommended supply voltage ≥ 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 | |
| Baud rate | 115200 bps | |
| Supply voltage | 3.3 V – 5 V (recommended supply voltage ≥ 3.5 V) |
LR1200D23 pinout
| Pin | Signal | Note |
|---|---|---|
| 1 | GND | Power − |
| 2 | VCC | Power + |
| 3 | I/O (Reserved) | Reserved for expansion |
| 4 | TXD | Signal output port, Ranging Module → Host |
| 5 | RXD | Signal input port, Host → Ranging Module |
| 6 | SW-SHOT | Function Enable (active high) Note: Compatible with active-low control requirements |
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 LR1200D23
The published single-unit price of the LR1200D23 is $130. Prices include shipping and are ordered directly from erdilrf.com. Technical questions and quantity quotes: tommy@erdimail.com. Full specification table, downloads and ordering: LR1200D23 model page.
FAQ
What is the maximum range of the LR1200D23?
The published range is 4 m – 1,200 m (max. 1,200 m) (Target reflectivity, target dimensions and atmospheric test conditions are not stated in the reviewed public technical table; confirm the applicable controlled document.). 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 LR1200D23 use?
The published communication interface is UART - TTL, customizable @ 115200 bps.
What laser wavelength does the LR1200D23 use?
The published wavelength is 905 nm ± 5 nm; laser safety entry: IEC Class 1.
How much does the LR1200D23 cost?
The published single-unit price of the LR1200D23 is $130. 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.
- LR1200D23 — LR1200D23 905 nm Laser Rangefinder Module