I am unable to measure correct temperature with the Cubecell HTCC-AB01 with the sample sketches from Heltec (ReadSHT2x.ino and BMP180basic.ino).
Regardless of whether I connect an SHT20/21 or a BMP180 sensor, the temperature is always measured way too high (+/- 45 degrees Celsius and not the actual 25 degrees Celsius). I have several sensors in stock and it doesn’t matter if I change them. I measured the Vext voltage, which is 3.29 volts. The same sensors work well on an Arduino Nano and Uno, so they are okay.
Can someone tell me if I am doing something wrong?