I am fairly new to Raspberry and Coding/electro-engineering in general but wanna get it done anyways. I've some questions regarding reading data from analog sensors.
Background: I got an AD/DA-high-precision-board from Waveshare which is already connected to the Raspberry Pi 3B+ and is delivering some data. Unfortunately this data seems to be way off the expected results.
Current status: the Sensor is a Lux-sensor which has three cables (positive, negative, ground - I guess) and I attached one of them to AGND and the other to a GPIO. The data isn't right though.
If I run the Board-Code (which is on their website High-Precision AD/DA Board) seemingly random numbers appear (see in the picture) Why's that?
If I connect the GPIO's with the sensor, the data behaves like it's AC but it's 100% DC
Also, I don't think it's anything wrong with the sensor because the Voltmeter is able to detect 10 mV (when in Sunlight) and about 0.1mV (when it's dark) on the sensor.
- Schematic: High-Precision AD/DA Board Schematic
- Product page: High-Precision AD/DA Board
- User manual: High-Precision AD/DA Board - User Manual
The Wires from the sensor
The Board-Code with data, but nothing is connected to the GPOI's
The Sensor (Lux-meter)