ok so for some reason the sensor i put on my pi does this too, and the sensor seems to like to randomly reset itself for no reason. the way i fixed it is by disconnecting and reconnecting the resistor.

@@cathamburger3161 I used the code in this tutorial and now it doe snot fail. www.circuitbasics.com/raspberry-pi-ds18b20-temperature-sensor-tutorial/

F

Hello , can you help me finding out what's the problem of my Raspberry Pi ? I mean , sensor . I try to connect the sensor (same as in the video) to the breakout board 0.8000000000 , used flooder to stick the resistor to the red and yellow and still 0.8000000 , i don't understand what to do , i am browsing for 6 hours and still nothing.

Since I did not have a resistor I've tried running in parasite mode but it did not help... when I got resistor it worked but it's kinda weird you need an extra resistor to make it work.

from a technical point of view it is explainable as it has an open collector. As for the ' why'? Well you could connect a whole bunch of these sensors to one pin,so if you would have an inbuilt 4k7 resistor and you would connect 10 sensors.... tghe combined pullup would be 470 ohm and that is just a little bit over the top

just a word of warning..... apparently NOT all breakoutboards have a pull up resistor attached. Although you could use the internal pull up of the raspberry pin, I found it more reliable to have a seperate 4k7-10k resistor for pull up

In this video there is Pluggable Terminal that (usually) comes with DS18b20 sensor. It has 4.7k resistor attached and wired correctly. So you can attach multiple sensors with single terminal (just by jamming more sensors to connector). If in doubt, just check if your terminal has tiny resistor that has numbers "472" on it.

I absolutely agree that you shouldn't change the wire colors whenever possible... but sometimes in life you experience a shortage of jumper cables and have to make due. :)

I need to to do the same thing, but I want it so when temp of pipe drops below a certain temp I get an email notification, My system has recirculating pump and sometimes it does not activate

I think it's possible, follow this forum: www.raspberrypi.org/forums/viewtopic.php?f=29&t=167896

Probably not as the sensor only goes to 85 deg C. EGT is much higher than that.

Right, thanks for the feedback. Definitely trying to address some of those quality issues in future videos.

such a reply deserves respect

sure

ds18b20 will do that, but for a child it seems easier to just buy a digital thermometer

As a biomedical engineer, please consider the electrical safety (IEC60601) for your infant

Check the description

I use Termux (For Android) to SSH into my Raspberries when I need to. I think Apples's equivalent to this app is Blink, and according to google it can be used for SSH connections.

"Plugable Terminal" says mine

Link in the description, the sensor and board usually come bundled together.

i tried to put nonlocal before ds18b20 but it says syntax error and if i put global, it says that it is undefined :(

It usually comes with the sensor. You can find them on ebay.

The DS18B20 sensor does not measure humidity.

To explain the 4.7k resistor wiring kzfaq.info/get/bejne/g8WAbNaq07a6k4U.html

www.maximintegrated.com/en/app-notes/index.mvp/id/4377

Thanks for taking the time to shove a link in there. I appreciate the lack of verbosity of the reply but unfortunately it doesn't help with my question much. I can see how the sensors work but not how the data is represented at pin level. Like I said in my question, I thought the Pi had just on/off for each pin, not a voltage level. Anyway, not to worry, I can look elsewhere for the answer.

I'm not entirely sure how the sensor works at the pin level... but this article seems to imply that the output pin communicates via serial to the raspberry pi. learn.adafruit.com/adafruits-raspberry-pi-lesson-11-ds18b20-temperature-sensing/ds18b20

Ok. Now I get it. So, I guess what I'm interested in is reading the pin data directly with Python. You are opening the file on the Raspi and parsing that data. From your second link I'm seeing that with a serial library I can actually pick the serial data up directly from the pin and the temperature probe itself is communicating directly in serial. That is VERY interesting - I didn't know I could do that with the Pi, so in effect I'm getting a type of analogue readout through a digital pin. Thanks for the info. I happen to have one of those probes from another project using a BlueTooth device to transmit the temp data but I'd like to try and use it now to read the serial data directly.

well the DS18B20 measures an analog value, but sends it in a digital format Whereever one sees the ds18b20 on a raspberry explained, it is the same old 'write to a file' which is a pity. The DHTxx series for instance can be read directly into a variable without the help of a file. Somehow should be possible with the DS18B20 as well. It is possible on a PIC or Atmel chip

Different setup and code, but yes the sensor should be compatible. www.bonebrews.com/temperature-monitoring-with-the-ds18b20-on-a-beaglebone-black/

Hey Nickolas, the boards are unlabled. However, if you search "Ds18b20 Adapter Module" in ebay you should see them.

@@PiddlerInTheRoot Thanks bud

@@PiddlerInTheRoot Thank you!! i could not find just the board anywhere.

What is your resistor value? Check out this thread www.raspberrypi.org/forums/viewtopic.php?f=28&t=155941

It's 4.6ohms

that's a tadd low.pick 4.7 kiloohms

set full screen and set quality to 1080p. Then you can read :)