Dallas One Wire Temperature And Humidity Sensor

Gnd is a ground pin.

Dallas one wire temperature and humidity sensor.

The sensor communicates over a 1 wire bus. Tsh202 is a 1 wire humidity and temperature sensor. 1 wire network allows multiple devices connected on the same bus in parallel. The connections are fairly simple.

Temperature to digital conversion to 9 10 11 or 12 bits. Enough of the theory let s go practical. Dq is 1 wire data bus should be connected to a digital pin on microcontroller. Vdd pin supplies power for the sensor which can be between 3 3 to 5v.

The ds18b20 uses maxim s exclusive 1 wire bus proto col that implements bus communication using one control signal. The control line requires a weak pullup resistor. Every 1 wire device has a unique 64bit id. The ms th is an easy to use 1 wire temperature and humidity sensor.

Both the supply voltage and the rh output voltage are part of the three wire connection to the humidity sensor. The th tl and configuration registers are nonvolatile eeprom so they will retain data when the device is powered down. 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. It provides a low cost option for humidity and temperature monitoring.

Other environmental sensors are available in our multisensor product line for accessories and other hardware see the products below. Let s hook the ds18b20 up to the arduino. A keil c compiler was used to implement the firmware for the 1 wire communication.