Temperature sensor - DS18B20 - Sensors - Arduino Forum
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I am having a strange behavior with the temperature sensor DS18B20. When I have two sensors, it works just fine, as expected. It detects both sensors and I can read both temperatures. If I disconnect one sensor, then I detect 0 sensors. The wiring that I have is like this: The pull-up resistance that I am using is: 4.7kΩ. I connected VCC to VIN in the ESP8266. I am pretty sure the issue is electrical not related to programming. In setup I have the following line: Serial.print( sensor
![](https://www.circuits-diy.com/wp-content/uploads/2021/04/Interfacing-DS18B20-1-Wire-Digital-Temperature-Sensor-with-Arduino-UNO.jpg)
Interfacing DS18B20 1-Wire Digital Temperature Sensor with Arduino UNO
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DS18B20 temperature sensors oscillating between -127 and actual
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DS18B20 Waterproof Temperature Sensor - Arduino Compatible
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Guide for DS18B20 Temperature Sensor with Arduino
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Ds18b20 - ds18b20 reading -127 - Sensors - Arduino Forum
![](https://i0.wp.com/randomnerdtutorials.com/wp-content/uploads/2019/07/DS18B20-tempeature-sensor-pinout.jpg?resize=750%2C490&quality=100&strip=all&ssl=1)
Guide for DS18B20 Temperature Sensor with Arduino
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Interfacing Multiple DS18B20 Digital Temperature Sensors with Arduino
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Two ds18b20 sensors on different pins - Sensors - Arduino Forum