A walkthrough of the DFRobot DS18B20 digital temperature sensor calibration procedure.
This sensor is relatively accurate even without calibration. At this stage, there is no formal calibration process for this sensor.
It is recommended that a calibration process is added in the future.
Reference on calibration can be found at: https://www.instructables.com/Calibration-of-DS18B20-Sensor-With-Arduino-UNO/
Further articles can be found by googling “DS18B20 Digital Temperature Sensor Calibration”.