What is the working principle of DS18B20 temperature probe?

DS18B20 temperature probe is a sensor that can convert the physical quantity of temperature through temperature sensitive components and corresponding circuits into digital quantities that can be directly read by data acquisition equipment such as computers, plc, and smart meters.

How to connect DS18B20 temperature probe with microcontroller?

When the temperature measured by DS18B20 temperature probe is negative, why add 1 first and then multiply by 0.0625?

What is the working principle of DS18B20 temperature probe?

How to connect DS18B20 temperature probe with microcontroller?

The DS18B20 temperature probe is enough to connect an IO port to the microcontroller, and the temperature data can be read only by satisfying the corresponding timing sequence. As for the 1602 display, as long as the temperature data can be read, the data can be converted into a string and sent to the 1602.

The temperature sensor is a digital sensor, which contains a processor chip, and directly outputs a digital temperature signal.

Three-channel 18B20 temperature measurement digital tube display. -55－+125℃, use 1-digit digital tube to display the current channel number, 4-digit digital tube to display the current channel temperature value of 18B20, the minus digit and the positive temperature hundred digit 1 use the same digital tube to display, this bit is 0 and not displayed

When the temperature measured by DS18B20 temperature probe is negative, why add 1 first and then multiply by 0.0625?

The binary read from the sensor must be converted into decimal before it can be used for the reality of characters. The conversion accuracy of DS18B20 temperature probe is 9~12 bits optional. The value in the temperature register is in steps of 0.062, that is, the temperature value is The binary value in the temperature register multiplied by 0.0625 is the actual decimal temperature value. The lowest bit of 12 bits is 1/16, which is 0.0625.

What is the working principle of DS18B20 temperature probe?

When the power supply is started, the DS18B20 temperature probe is in the energy-off state. After the power supply, the user can change the register resolution to make it in continuous conversion temperature mode or single conversion mode. In the continuous conversion mode, the DS18B20 temperature probe continuously converts the temperature and stores the result in the temperature register. Reading the contents of the temperature register does not affect its temperature conversion; in the single conversion mode, the DS18B20 temperature probe performs a temperature conversion, and the result is stored in the temperature register, and then back to shutdown mode, this conversion mode is suitable for temperature-sensitive applications. In the application, the user can set the resolution register through the program to achieve different temperature resolutions, the resolutions are 8-bit, 9-bit, 10-bit, 11-bit or 12-bit, the corresponding temperature resolution is 1.0 ℃, 0.5°C, 0.25°C, 0.125°C or 0.0625°C, the default resolution of the temperature conversion result is 9 bits. DS1722 has two communication interfaces, Motorola serial interface and standard three-wire interface. Users can select the communication standard through the SERMODE pin.

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