I am integrating the PR33-15 with our ESP32 based edge architecture for robotics. I2C is fine, I’m happy accessing the readings in the device.
I was hoping to get some more information on best practices when connecting to a 2-wire passive analogue device - it is essentially a photodiode which outputs a microamp output or mV output with a resistor. I am hoping to read this value on the PR33-15 (well 2 signals on 2 channels actually) as we are calculating NDVI. The sensors are quite pricey, so definitely don’t want to damage them, by powering them or similar.
So this sensor doesn’t need any power. its like a phototransistor. generates a small amount of current proportional to the light.
You will need this produt
Add a 10Kohm resistor and that will convert the mA into voltage.