Post a new topicPost a reply Page 1 of 1   [ 7 posts ]
Author Message
 Post subject: Problems with body temperature measurement
PostPosted: Wed Oct 04, 2017 5:51 pm 

Joined: Sun Oct 01, 2017 8:01 am
Posts: 18
Hi everyone

I'm trying to meausre bory temperature.

The board returns some values, but they dont seem correct.

First, I got outrageous values above 49 degrees, which if correct indicates that I'm not living human, which unfortunately for you is not the case.

I tried two solutions.

(i) The I unplugged the shield from Arduino UNO and connected them again.

(ii) calibrated the resistance values in .cpp file according to the instructions in your websote.
https://www.cooking-hacks.com/documenta ... pi-medical

The corrected resistance values are as followos.

float Ra=4620.0; //Wheatstone bridge resistance.
float Rc=4670.0; //Wheatstone bridge resistance.
float Rb=822.0; //Wheatstone bridge resistance.

Thereafter, the situation got better slightly, but I still get values above 38 degrees.
Body temperature above 38 deg is not outside physiological range.
But I'm not feeling sick right now, which gives me reason to doubt the validity of measurement.

I tried the original resistance values as well.
But the results remained the same.

Whats the problem?

best


Top
 Profile  
 
 Post subject: Re: Problems with body temperature measurement
PostPosted: Thu Oct 05, 2017 8:43 am 

Joined: Mon Sep 28, 2009 12:06 pm
Posts: 11323
Hello hhhddd,

please try making this change, in the library "eHealth.cpp" search for the function "float eHealthClass::getTemperature(void)" and change

Code:
float Vcc=3.3;


for

Code:
float Vcc=5.0;


Regards


Top
 OnlineProfile  
 
 Post subject: Re: Problems with body temperature measurement
PostPosted: Mon Oct 09, 2017 2:26 pm 

Joined: Sun Oct 01, 2017 8:01 am
Posts: 18
Hi everyone

I made the change to .cpp file accordingly.
But, the values returned by this function still remain very high (harbor around 39-42)

What's the next step?


Top
 Profile  
 
 Post subject: Re: Problems with body temperature measurement
PostPosted: Tue Oct 10, 2017 7:22 am 

Joined: Mon Sep 28, 2009 12:06 pm
Posts: 11323
Hi hhhddd,

Can you tell us your order number?

Once you plug the sensor, 10 minutes later, do you get the same temperature range?

Thanks.

Regards


Top
 OnlineProfile  
 
 Post subject: Re: Problems with body temperature measurement
PostPosted: Thu Oct 12, 2017 4:36 am 

Joined: Sun Oct 01, 2017 8:01 am
Posts: 18
Hi everyone

I measured the temprerature 10 and 20 min after plugging in the sensor.

The values now harbor arond 34-35deg in both cases.

I have no idea what this shield is measuring.
The only thing I can say about this stuff is that this sensor is highly unstable (and unreliable).

>>Can you tell us your order number?

I purchased this product through Japanese agency of yours.
So, i dont know the order number.
Should I contact the agency?

Best


Top
 Profile  
 
 Post subject: Re: Problems with body temperature measurement
PostPosted: Thu Oct 12, 2017 5:56 am 

Joined: Sun Oct 01, 2017 8:01 am
Posts: 18
the order number is Order #100033038.
Its issued by UNIPOS (the agency)


Top
 Profile  
 
 Post subject: Re: Problems with body temperature measurement
PostPosted: Mon Oct 16, 2017 8:45 am 

Joined: Mon Sep 28, 2009 12:06 pm
Posts: 11323
Hello hhhddd,

we have checked that your order is from 2015. Because you have so many problems with the different sensors, it could be a hardware failure. Unfortunate the product is outside the warranty period according to our legal terms:
http://www.libelium.com/resources/legal/

If you want to start a reparation process you can check our RMA process:
http://www.libelium.com/downloads/Libel ... rocess.pdf

Regards.


Top
 OnlineProfile  
 
Display posts from previous:  Sort by  
Post a new topicPost a reply Page 1 of 1   [ 7 posts ]


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum

Search for:


Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group
Libelium theme based on 610nm Style by Daniel St. Jules of http://www.gamexe.net


© Libelium Comunicaciones Distribuidas S.L. | Terms of use.