Does BH1750 actually work at 3.3V?
Tigger 2024-12-01 09:06:07 27 Views2 Replies Configured using default pins using Raspberry Pi Pico W and sample code from:
https://wiki.dfrobot.com/Light_Sensor__SKU_SEN0097_
Doesn't work. I2C seems to connect but RequestFrom always results in zero bytes returned.
Tried both controller 0 and controller 1.
Has anyone else had success with this module? What is the other potential I2C address? (other than 0x23)
I got it working on an old Arduino UNO.
Next steps: is it too slow for the RP2040 or does it not work at 3.3V as claimed by DFRobot?
Tigger You can try to use UNO's 3.3V to power it and test it again. If the sensor can work properly with UNO's 3.3V, then it is not a power supply problem. DFRobot's wiki also shows that the sensor can work at 3~5V.
Next you need to check whether the sensor is connected to GP20 and GP21, because PR2040 has two I2C buses, and the wire corresponds to I2C0.
