LRF1222C · 1.54 µm Laser Rangefinder Module
LRF1222C UART wiring, pinout and serial protocol
The LRF1222C talks RS422 and is powered from DC12 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 | RS422 | |
| Connector / interface alternatives | J30J / RS-422 in the specification table; Molex 51021-0500 / TTL alternative in the interface section. Confirm the ordered version. | |
| Supply voltage | DC12 V |
LRF1222C pinout
| Pin | Signal | Note |
|---|---|---|
| 1 | TTL RX | 3.3V |
| 2 | TTL TX | 3.3V |
| 3 | CTRL | 3.3V-5V power on, 0V power off |
| 4 | +12V | Power supply+ |
| 5 | GND | Power supply- |
| 1 | GND | Serial Port Ground |
| 2 | GND | 12V Input Negative |
| 3 | GND | 12V Input Negative |
| 4 | VCC 5V | 12V Input Positive |
| 5 | VCC 5V | 12V Input Positive |
| 6 | RS422 RX+ | Serial Port Receive + |
| 7 | RS422 RX- | Serial Port Receive - |
| 8 | RS422 TX- | Serial Port Transmit - |
| 9 | RS422 TX+ | Serial Port Transmit + |
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 LRF1222C
The published single-unit price of the LRF1222C is $3,400, falling to $1,300 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: LRF1222C model page.
FAQ
What is the maximum range of the LRF1222C?
The published range is Reference target(2.3m × 2.3m) ≥12 km. 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 LRF1222C use?
The published communication interface is RS422.
What laser wavelength does the LRF1222C use?
The published wavelength is 1.54μm±0.02μm; laser safety entry: Class I stated in the module document. Final accessible-emission classification applies to the complete configuration..
How much does the LRF1222C cost?
The published single-unit price of the LRF1222C is $3,400, falling to $1,300 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.
- LRF1222C — LRF1222C 1.54 µm Laser Rangefinder Module