DEVELOPMENT OF DHT11 AND 8X8 DOT MATRIX LED LIBRARIES FOR TEMPERATURE DISPLAY SYSTEM BASED ON ARDUINO
Keywords:
Arduino, DHT11, 8x8 dot matrix LED, library files, Temperature displayAbstract
This paper is about how to write Libraries for DHT11 (Temperature & Humidity Sensor) and 8x8 Dot matrix
LED (1088BS). DHT11 has single data pin which can be used as bidirectional pin, so before reading DHT11 Arduino
has to send the signal for getting back data from DHT11. DHT11 provides 40 bits (5 bytes) of data. 2 bytes for integral
and decimal part of humidity, 2 bytes for integral and decimal part of temperature and final byte will provide
checksum.The pins of 8x8 dot matrix LED needs to be identified first. Once the pins are known the library can be written
for it. For this pape,r 8x8 dot matrix LED doesn’t require driver circuit. 8x8 dot matrix LED can be connected through
wires with the port pins of Arduino. It can display temperature up to 2 digits means 0 to 99 ℃