ABC of Electronics cosycom.com
EMBEDDED SYSTEMS & MICROCONTROLLERS · PAGE 77

Project: Mini Weather Station

Several sensors, one display.

Connect a temperature and humidity sensor on I2C and a pressure sensor on the same bus, each with its own address. Read them once a minute.

Show the values on a character display and send them over UART to a computer. Store maximum and minimum values in non-volatile memory.

Sleep between readings and compare against a reference thermometer to check accuracy.