PI PICO W
Frost-free fruit with a Pi Pico
Les Pounder grows strawberries in his garden, but now he has planted a Raspberry Pi Pico, hoping for a fresh crop of raspberries.
The build for this project can be easily transferred to a PCB, Veroboard and so on, and integrated into a 3D printed case.
OUR EXPERT
Les Pounder is associate editor at Tom’s Hardware and a freelance maker for hire. He blogs about his adventures and projects at
http://bigl.es.
I n this tutorial, we’re building something to keep our strawberries safe from frost. Using a DHT11 temperature sensor, an OLED display and a Pico W, we will get live temperature data displayed on the screen and an alert to a smartphone using Ntfy.sh. The circuit for this project is broken down into two parts. The input is our DHT11 temperature and humidity sensor, which connects to the Pico’s 3.3V output, GND and the data pin to GP2. The OLED display connects to 3.3V, GND and to SDA (GP0) and SCL (GP1). See the high-res diagram, available in the download for this issue.
YOU NEED
Pi Pico W or Pico 2 W
Breadboard
DHT11 temperature sensor
I2C OLED 128x64 pixel display
7x M2M jumper wires
Code: https://bit.ly/lxf328code
Coding the project