This repository contains a program to calibrate a 3.5" touch screen display shield, as shown below - Most 3.5" TFT LCD Touch displays use the ILI9486 Display Driver and include a resistive touchscreen ...

Arduino Library to support the Bosch BMV080 Particulate Matter Air Quality Sensor PM2.5 via I2C and SPI. - sparkfun/SparkFun_BMV080_Arduino_Library ...

If you need to track your glucose, these monitors connect to your phone or smartwatch.