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Questions tagged [ds18b20]

DS18B20 is a digital 1-wire thermometer chip that can be connected to Raspberry Pi GPIO pins.

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DS18B20 Temperature Sensor - Rpi 3/4 Driver, Wiring, Detection, and Python Programming

I am new in raspberry pi. In my research project, I would like to monitor ground temperature at 60 points. My team decided to set a monitoring system using raspberry pi. As a preliminary test, I ...
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0answers
38 views

DS18B20 reading double after long use

I installed two DS18B20s on a pi almost a year ago. They have worked great until the last couple months. I am doing a bit of a stress test on them and have been polling them every second for almost a ...
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0answers
62 views

DS18B20 temp sensor works on Pi 3B+ but not Zero W

I have a breadboard prototype working with a cabled (waterproof and regular temp) DS18B20 sensor and a AM2302 sensor on a 3B+. All is well with it recording at a set interval from each sensor. I'd ...
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170 views

w1thermsensor is not detected

I am using DS18B20 Temperature sensor on Raspberry Pi. For that I installed w1thermsensor library on my Raspberry Pi. My code is given below. import time from w1thermsensor import W1ThermSensor ...
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0answers
53 views

wifi comes up but then disappears when temp sensors connected to GPIO

I have a headless PiZero with a wifi dongle using a RPI PSU (and it's running Domoticz). It boots fine and is all OK until I boot it with my long (20m?) wire of DS18B20s connected. With that plugged ...
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0answers
222 views

Using several sensors at the same time, e.g. 1wire and regular GPIO input

I'm doing my first Raspberry Pi project, in which I want to get input from several sensors at the same time. I bought a DS18B20 temperature sensor, which is 1wire, and am able to get input with the ...
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0answers
108 views

Thermometer no longer working

I am running the below lines to try to load my two therms. sudo modprobe w1-gpio sudo modprobe w1-therm ls /sys/bus/w1/devices All I am getting is 00- instead of 28- I have checked wiring, works ...
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0answers
671 views

DS18B20 way too high temperature values

I am using 2 DS18B20 temperature sensors connected to my raspi. They are connected to a 5 meter long cable together with a DHT11 humidity sensor, do they share plus and minus. The problem I have is ...
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0answers
30 views

W1 works on one pi but not the other

I have recently purchased a Raspberry Pi Zero w and soldered the GPIO pins. I set up a DS18B20 and everything worked fine. I used some other pins as inputs and went back to check the sensor but the pi ...
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33 views

Name of the board for DS18B20s

I was referred in another post with a picture of a board that looks like attached picture. What is the name of the board. Also if I require step up resistors would there be a place I could add that to ...
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32 views

DS18B20 & Pi 3+

I'm not getting a w1_slave, and all I'm getting is 00-xx0000 when the DS18B20 isn't burning my fingertip. I went for green for ground, which is on the top right plug from this perspective. I spliced ...
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0answers
553 views

Temperature Sensor (DS18B20) doesn't work

I am having trouble getting to run my temperature sensor. If I execute the following script to check if the PIN 7 gives me an output, it returns 1 (as it ought to). import re, os, urllib2 import ...
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2k views

DS18B20 shows 00-xx0000

I am using a DS18B20 to measure water temperature for about a year now, but changed the sensor about two weeks ago (for the exact same model). and that was running perfectly fine. Just yersterday it ...
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378 views

Performant way to dump DS18B20 data to Mongo

I've worked with DS18B20 sensors before and have written and used scripts to access their data and make it available to a webserver using Flask and javascript. Now however I'm looking for a way to ...