Hi everyone,
I’m trying to connect a WCMCU-101 (OPT101) photodiode amplifier module to my ESP32, but I’m getting confusing behavior depending on how I wire it.
I already bridged the three back pads (N–C–R) with solder (to enable the internal 1 MΩ feedback resistor), and I’ve tested several wiring ...
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- Wed Nov 12, 2025 3:17 pm
- Forum: Hardware
- Topic: Trouble connecting WCMCU-101 (OPT101) to ESP32 – inconsistent or saturated output readings
- Replies: 0
- Views: 2565