sen0626 with raspberry pi4
hugo.daigonnay 2025-11-05 21:20:01 22 Views4 Replies sen0626 is connected to raspberry pi4B with I2C bus. It works, because led lights in accordance with right detections (face and gestures). I2C adress is correct (072). But the reading register give 65535 for all register.
I precised, the power supply is 3,3v.
Can you help me
Thank you
Hello
In fact it work with the serial port (usart), and it work very fine. The I2C bus remains a mystery to me
hugo.daigonnay Thanks for your answer.
VID and PID register returns 0xFFFF, so I don't know where is the problem. My supply is 3,3v and not 5V, can it be the problem . I am using smbus2
Thanks
hugo.daigonnay The SEN0626 uses I²C and a Modbus-style register map (default I²C address 0x72). The vendor docs show that 0xFFFF is used as a "no-data" / no-face indicator for some registers (e.g. X/Y coords) — so seeing 0xFFFF for face coordinates can be normal when no face is present. But if every register (including VID/PID) returns 0xFFFF, that suggests the read method/pointer or protocol is wrong.
ahsrab.rifat Thanks for your answer.
VID and PID register returns 0xFFFF, so I don't know where is the problem. My supply is 3,3v and not 5V, can it be the problem . I am using smbus2
Thanks
