Components

• 1 × RP2040-Zero microcontroller This is a mini version of RP Pico. It fits small project better because you don't need to use all the GPIO anyway. You will have a compact design using this. More important is the price, this one is cheaper that the original Pico.
• 1 × SHT31 This Humidity and Temperature sensor is popular thanks to the accuracy and repeatablity. It is much better than DHT11 or DHT22 which are usually come with beginner kit.
• 1 × SGP30 Multi-gas (VOC and CO₂eq) sensor.
• 1 × 0.96" in. oled SSD1306 In this versio I used the 2-colors yellow and blue, you should update the address of the screen in the ssd1306.py (line 105) to 0x3D instead of 0x3C