Huskylens no I2C data on multiple devices?
prok 2026-02-18 11:05:38 269 Views3 Replies Hello, I have a huskylens 2 and i've been struggling. I believe I may have a faulty I2C bus on the huskylens itself as 3 different pi devices all return nothing but FFFF for any data which indicates no real response at all. It's there on I2C bus 1 on 0x50 but no variation of any python script or basic i2c test script is able to connect at all. Any suggestions? Is there perhaps a known working project out there to test with?
FFFF usually means the HuskyLens 2 is detected but not actually communicating—often due to wrong mode or wiring.
Make sure it’s set to I2C mode, wired correctly (SDA/SCL, GND, 3.3V), and try adding pull-up resistors.
If multiple Pis still fail, test with DFRobot’s example code—otherwise the unit may be faulty.
parker.king Hello! Regarding your issue with the HUSKYLENS 2 I2C bus communication failure:
First, please ensure your HUSKYLENS 2 has been updated to firmware version 1.2.2. This version fixes multiple communication instability issues, and updating the firmware is a mandatory prerequisite for resolving the problem.
Firmware update tutorial: https://wiki.dfrobot.com/sen0638/docs/22673
Next, you can directly test the sample programs on our GitHub repository — these programs have undergone thorough testing and are confirmed to work properly.
https://github.com/DFRobot/DFRobot_HuskylensV2/tree/master/python/pinpong/examples
niu.yixuan 
