Dallas One Wire Temperature And Humidity Sensor

Let s hook the ds18b20 up to the arduino.

Dallas one wire temperature and humidity sensor.

1 wire humidity and temperature sensor is a low cost open source device for measuring temperature and relative air humidity in 1 wire micro lan network. The connections are fairly simple. The ds18b20 uses maxim s exclusive 1 wire bus proto col that implements bus communication using one control signal. Dq is 1 wire data bus should be connected to a digital pin on microcontroller.

1 wire network allows multiple devices connected on the same bus in parallel. The ms th is an easy to use 1 wire temperature and humidity sensor. Tsh202 is a 1 wire humidity and temperature sensor. Each sensor has a unique 64 bit serial code which allows multiple sensors to be connected on the same 1 wire bus.

Gnd is a ground pin. The control line requires a weak pullup resistor. Using the plug and play technology the ms th can be daisy chained with other 1 wire products to create a low power environmental sensor network. Every 1 wire device has a unique 64bit id.

Wiring ds18b20 temperature sensor to arduino. Both the supply voltage and the rh output voltage are part of the three wire connection to the humidity sensor. Vdd pin supplies power for the sensor which can be between 3 3 to 5v. A keil c compiler was used to implement the firmware for the 1 wire communication.

The sensor communicates over a 1 wire bus. Temperature to digital conversion to 9 10 11 or 12 bits. It provides a low cost option for humidity and temperature monitoring.