NTFY
Create notifications from smart sensors
Les Pounder loves building gadgets with the low-cost Raspberry Pi Pico W – and some of them, like this one, even work.
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.
YOU NEED
›Pi Pico or Pico W
›Android or Apple phone or tablet
›Breadboard
›3x M2M wires
›DS18B20 temp sensor (waterproof optional)
›4.7kOhm resistor (yellow - purple - red - gold)
›Screw terminal (optional)
›Code: https://bit.ly/ lxf314temp
Getting notifications on our smart devices is so easy – almost too easy, in that they become an annoyance. But what if you really need a notification from one of your projects? We’ve been using Ntfy for a few months now and it is super-simple to use. No fancy Python modules are required. We just need an Android or iOS app, and we’re ready to go. We can send text, images and even files using the service.
In this tutorial, we’re creating a simple notification system that sends hourly temperature readings directly to our Android device. The sensor, a DS18B20, has been chosen because it can be used without any software installation. The DS18B20 also comes in a waterproof variant, useful for checking water or ground temperature without damaging the sensor.