Dallas One Wire Temperature And Humidity Sensor

Vdd pin supplies power for the sensor which can be between 3 3 to 5v.

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. Enough of the theory let s go practical. Dq is 1 wire data bus should be connected to a digital pin on microcontroller. The sensor communicates over a 1 wire bus.

The ds18b20 uses maxim s exclusive 1 wire bus proto col that implements bus communication using one control signal. 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. 1 wire network allows multiple devices connected on the same bus in parallel.

Tsh202 is a 1 wire humidity and temperature sensor. Gnd is a ground pin. A keil c compiler was used to implement the firmware for the 1 wire communication. Both the supply voltage and the rh output voltage are part of the three wire connection to the humidity sensor.

The control line requires a weak pullup resistor. Temperature to digital conversion to 9 10 11 or 12 bits. Every 1 wire device has a unique 64bit id. Let s hook the ds18b20 up to the arduino.

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. The ms th is an easy to use 1 wire temperature and humidity sensor. The th tl and configuration registers are nonvolatile eeprom so they will retain data when the device is powered down.