Dallas One Wire Temperature And Humidity Sensor

The control line requires a weak pullup resistor.

Dallas one wire temperature and humidity sensor.

Every 1 wire device has a unique 64bit id. 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 th tl and configuration registers are nonvolatile eeprom so they will retain data when the device is powered down.

The connections are fairly simple. Dq is 1 wire data bus should be connected to a digital pin on microcontroller. The ms th is an easy to use 1 wire temperature and humidity sensor. Temperature to digital conversion to 9 10 11 or 12 bits.

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

The sensor communicates over a 1 wire bus. Gnd is a ground pin. It provides a low cost option for humidity and temperature monitoring. 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. 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.