The Holybro PMW3901 Optical Flow Sensor is a UART version of the PMW3901 module with built-in BEC. It comes pre-solder with a 6-pin JST GH connector made to connect right to TELEM ports on most flight controllers. Compatible with PX4 (PX4 Guide) & Ardupilot (Data format same as discontinued product CX-OF).
 
Technical details:
Dimension: 14x11x5mm
Weight: 0.6g
Interface: UART
Baud rate: 19200
FPS: 95hz
Power: 2.0~3.6V
Current: 10mA
 
Data Format:
byte0: header (0xFE)
byte1: number of data bytes (0x04)
byte2: x-motion high byte
byte3: x-motion low byte
byte4: y-motion high byte
byte5: y-motion low byte
byte6: checksum
byte7: surface quality
byte8: footer (0xAA)
 
Included
1x PMW3901
1x GH6P 170mm Cable(installed)
1x TPU Protective Case Shell