DS18B20 calculator – HEX to temperature

Converts the temperature register of the DS18B20 sensor from hexadecimal into degrees Celsius and back. It covers all four resolutions from 9 to 12 bits, both byte orders of the scratchpad read-out and negative temperatures stored in two’s complement.

          DS18B20Calculator
        

{{ t.resLabel }} {{ resolutionBits }}-bit

9101112

          {{ t.confLabel }} = {{ confRegisterHex }}
          {{ t.stepLabel }} = {{ stepText }} °C
          {{ t.convLabel }} ≤ {{ convTimeText }} ms
        

⚠ {{ errors.hex }}

{{ tempFromHexText }} °C —

          {{ t.regLabel }} = {{ hexDetails.wordHex }}
          RAW = {{ hexDetails.rawDec }}
          {{ hexDetails.kelvin }} K
          {{ hexDetails.fahrenheit }} °F
        

          {{ b.v }} 
        

⚠ {{ hexNote }}

⚠ {{ errors.temp }}

{{ hexFromTemp }} —

          {{ t.bytesLabel }} = {{ tempDetails.bytes }}
          {{ t.roundedLabel }} = {{ tempDetails.rounded }} °C
        

          {{ b.v }} 
        

{{ t.rangeLabel }} -55 … +125 °C

Reading the sensor is only one part of a measuring system — the 1-Wire bus, the power supply and the firmware follow. If you need a finished device rather than just the numbers, see our custom electronics design offer.