Firmware and hardware specification for a USB SHT35 temperature/humidity sensor.

Hardware:

1. Purchase I2C High Accuracy Temp&Humi Sensor (RS 184-5091) and XIAO RP2040 (RS 250-0966).

2. Wire as follows and cut the top from the wiring connector to reduce its height:

3. 3D print shtstick_cap.step and shtstick_cover.step.

4. Install firmware as described below.

5. Assemble electronics in case.

Compilation/Installation

Requires a working installation of the Raspberry Pi Pico SDK.

Compile the firmware using

cd build
cmake ..
make

Boot the RP2040 into bootloader mode and copy the generated shtstick.uf2 to the mounted directory.