I have recently purchased an Arduino Nano 33 IOT together with two sensors:
- Adafruit SHT31-D (https://learn.adafruit.com/adafruit-sht31-d-temperature-and-humidity-sensor-breakout)
- Adafruit SGP30 (https://learn.adafruit.com/adafruit-sgp30-gas-tvoc-eco2-mox-sensor/)
However, so far I have not succeeded in reaching any of these two sensors. For example I connect the SHT31 sensor like this:
- +3.3V to Vin
- GND to GND
- A4 to SDA
- A5 to SCL
I have tried the default Adafruit SHT31-D example without success, the program appears to hang. I have tried a standard I2C scanner but it does not find any devices with the sensor connected. When the sensor is disconnected, it does find two devices (the IMU and something else I guess).
I believe there is something funky going on with the I2C connection of the internal sensors and the external ones but I have no idea how to troubleshoot this issue. I read some stuff about TwoWire (extern TwoWire Wire1; after the #include) but I am having a hard time figuring out if this is what I need and how to implement it.