Reading temperature from DS18B20 digital temp. sensor using DAQ USB6008??

[KayK]

hello..
im trying to read the temperature reading from this DS18B20 digital temperature sensor...
it is a 1-wire interface sensor...and its provides digital temperature measurements...
im using the DAQ USB6008 Digital I/O to read this sensor...
how can i get the exact degree C reading by using LabVIEW and this USB6008??
below is the datasheet of the temperature sensor DS18B20....
anyone can help??

[Karissa]

The DAQ USB6008 was designed for analogue type sensors and simple digital IO, not sensors with a digital serial output.

I have used similar 1-wire sensor chips in projects.

To get the readings from these chips we usually used Microprocessors. You could probably use a 1-wire serial or USB bridge to connect directly to the PC though. 

[Petry]

Hi

I was thinking about doing the same thing, to use a DAQ USB 6009 (in my case) to read the digital temperature in the 1 wire protocol of the DS18B20.

Ofcourse that the DAQ has only i/o digital or i/o analog pins. But if we make a program in Labview using the external circuitry explained in the PDF of standard of iButton devices to follow the same 1 wire protocol I think that it is possible. What do you think about?

The circuitry is on page 5, Figure 1-4

[ShishKeBobby]

Hi Petry,

The 6009 is excellent at simple digital input output and analog measurements.  However. I'm going to echo what Karissa said and recommend you use a different device to communicate with your temperature sensor.  

Best Regards,

[Petry]

Hi,

I will create a Labview App using this DAQ USB6009 because I will make analog temperature meassurements too, that was the reason. I found out that I can receive the digital data of a 1 wire device by using an USB to 1 wire adaptor (logic?? jaja). I found this Labview App that alouds you to meassure a whole 1 wire network. The question is if can I use the App or a part of the App for me to make my Labview temperature behavior App?. I already sent an e-mail for me to know about that possiblity.

Here is the link 🙂

https://decibel.ni.com/content/docs/DOC-1092

[adanali]

Hi Petry;

I have a DAQ USB 6009 and DS18B20 digital temperature sensor. I want to read temperature from this sensor. If possible, could you please send me your program about it? I'm using Labview 2010.

Thanks a lot...

[QueenSelene]

Hi adanali,

I believe this community example https://decibel.ni.com/content/docs/DOC-1092 could be what Petry was talking about. Are you able to use this to read the temperature from your DS18B20? If not, what problems are you running into? 

Thanks!

[adanali]

Hi Selene;

First of all, I want to thank for your interest. Yes, I saw the topic about "Reading 1-Wire DS18B20 and DS18S20 Via a Serial or USB Adapter". Actually, I want to read the temperature with DS18B20 via arduino. I attach a program about it, but it doesn't work. It measures only "1".

Best Regards,

[QueenSelene]

Hi adanali,

No problem! For some reason I can't open your VI, I don't know if it's a problem on my end or with the VI but could you possibly include a VI snippet instead? I'm not very familiar with programming Arduinos in LabVIEW so I'm afraid I won't be much help on that front. I do know we have some great resources on the LabVIEW makerhub website if you haven't had a chance to look there yet:

https://decibel.ni.com/content/groups/labview-interface-for-arduino 

Posting your question to those discussion forums may also yeild some more info as people know more about the Arduino side of things there. 

Finally, I was able to find this article which is from a third party website but seems pretty closely related to what you're trying to do, it may be worth checking this out, as well as the library they're talking about:

http://www.hobbytronics.co.uk/ds18b20-arduino

Thanks!

[adanali]

Hi Selene;

Thank you very much for your kind interest

Best Regards