In this sample project we are going to build a NodeMCU data logger that uses the Adafruit cloud to store the temperature and humidity data. To make it even more exciting we are putting the NodeMCU to sleep in the periods that we are not transmitting the data to the cloud.
Read MoreThis project is to give a practical example of using power save modes with Arduino's. It uses a Real Time Clock (RTC) to wake up an Arduino Data Logger. It write the temperature and humidity in a room to a micro SD card. It is optimized for saving power thus can run of a battery pack.
Read MoreA couple of year’s back I bought one of the Neopixel light strings from Adafruit. I think it was 200 leds. I used them one season and put them away. This Christmas I decided to make an IOT Christmas light display out of it just above our horizontal blinds.
To do this I used the code explained in the Tutorial:Storing WiFi Configuration On Your ESP8266 Using The EEPROM Library Made Simple Part 1 and Tutorial part 2. I also used code from the Adafruit Neopixel example code and integrated it with my base code to create an IOT device from the tutorial.
Read MoreCreating graphics for the Nokia 5110 display using an Arduino and the Adafruit Library
I use the Nokia 5110 display in many of my projects. It is inexpensive and reliable. I also use the Adafruit library for this display as it is easy to use and feature rich. The only issue I had with this library was displaying icons and other graphics on it.
All the tutorials I could find dealt with how to concert a bitmap to a format this display could use were with a utility called LCD Assistant. And this does not work with the Adafruit library. This tutorial will take you through the steps how to create graphics using the Adafruit Library
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