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maemo.org - Talk (https://talk.maemo.org/index.php)
-   Nokia N900 (https://talk.maemo.org/forumdisplay.php?f=44)
-   -   IR Port used as a thermometer? (https://talk.maemo.org/showthread.php?t=61327)

tzsm98 2010-08-29 02:36
IR Port used as a thermometer?
 
I've seen some discussion on the boards about the IR port and there is not a consensus on the ability of the port to receive. Some folks think it can based on the chipset and others seem to think it can not.:confused:

If it can receive is it possible to configure it to act as an IR thermometer?

I've dropped this question into Brainstorming. I've not seen where this has been addressed elsewhere on the site. If it has, moving this post to the appropriate thread would be fine.

cddiede 2010-08-29 02:41
Re: IR Port used as a thermometer?
 
The IR device on the N900 is just a transmitter, not a receiver. It's been previously reported that because of this, the N900 is not IR file transfer (IrDA) compliant.

http://forum.dailymobile.se/index.ph...c,12511.0.html

With just a transmitter, and no ability to take input it only really good for IR based remote control applications.

HellFlyer 2010-08-29 03:23
Re: IR Port used as a thermometer?
 
lol my old N95 8gb had IrDA functionality , is this a software/driver limitation or hardware?

tzsm98 2010-08-29 03:32
Re: IR Port used as a thermometer?
 
Quote:
Originally Posted by HellFlyer (Post 801132)
lol my old N95 8gb had IrDA functionality , is this a software/driver limitation or hardware?
That's the question I have. I can not find the post again, I found it earlier this evening, but somewhere on this forum the chipset for the IR piece was mentioned and the person mentioning it seemed to think that that chip also functioned as a receiver. He thought it was a software issue. Cddeide believes it to be a hardware issue, as far as I can tell.

My 6103 had IrDA. Used to send files back and forth with my son.

fahadj2003 2010-08-29 04:57
Re: IR Port used as a thermometer?
 
this isnt infrared for sending/receiving files
this is the infra red based on the tv remote control
it cant send/receive data
i cant send data either to be exact
it sends little bits or to be exact, programmable commands for other devices that use an IR remote like tv..
did you understand what i said?

ossipena 2010-08-29 07:39
Re: IR Port used as a thermometer?
 
Quote:
Originally Posted by HellFlyer (Post 801132)
lol my old N95 8gb had IrDA functionality , is this a software/driver limitation or hardware?
try switching tv channels from 5 meters with your N95 IrDA functionality....

N900 has much more TX capability.

hsmade 2010-08-29 10:56
Re: IR Port used as a thermometer?
 
There is no receiver led in the N900. So even if the chipset would support it, an additional led would have to be soldered on the bord.

shadowjk 2010-08-29 11:03
Re: IR Port used as a thermometer?
 
It's basically a big infrared LED with a helper pwm component to modulate it at 38kHz or thereabouts..

quingu 2010-08-29 16:14
Re: IR Port used as a thermometer?
 
It's exactly the same as the "notification" (charging light) LED. Only that it has a infrared LED.

Silvarum 2010-08-29 16:32
Re: IR Port used as a thermometer?
 
Well, there is a proximity sensor, which sends an IR signal and watches for return signal. Basically, it is a transceiver.


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