Dallas One Wire Temperature And Humidity Sensor

The connections are fairly simple.

Dallas one wire temperature and humidity sensor.

Temperature to digital conversion to 9 10 11 or 12 bits. Vdd pin supplies power for the sensor which can be between 3 3 to 5v. Other environmental sensors are available in our multisensor product line for accessories and other hardware see the products below. A keil c compiler was used to implement the firmware for the 1 wire communication.

The th tl and configuration registers are nonvolatile eeprom so they will retain data when the device is powered down. The ds18b20 uses maxim s exclusive 1 wire bus proto col that implements bus communication using one control signal. Both the supply voltage and the rh output voltage are part of the three wire connection to the humidity sensor. The ms th is an easy to use 1 wire temperature and humidity sensor.

Enough of the theory let s go practical. 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. Let s hook the ds18b20 up to the arduino. Dq is 1 wire data bus should be connected to a digital pin on microcontroller.

The sensor communicates over a 1 wire bus. Each sensor has a unique 64 bit serial code which allows multiple sensors to be connected on the same 1 wire bus. Tsh202 is a 1 wire humidity and temperature sensor. The control line requires a weak pullup resistor.

Gnd is a ground pin. Wiring ds18b20 temperature sensor to arduino. 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.