And once over that hoop...you may be able to switch in a lower
reference voltage for doing the conversion, assuming you can get the
range you want under the new Vref. I think this would require some
low-level ADC code hacking. Otherwise you'll probably have to
explore external sensors with an opamp pre-conditioner or some such.
MS
Siirtola Harri wrote:
Hi,
The accuracy of the thermistor itself is a lot worse than 0.2C IIRC. So
the first thing to do would be replacing it, then calibrating the system
as desired.
Regards,
Harri
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of
Michael Collett
Sent: Thursday, February 08, 2007 2:28 PM
To: TinyOS Help (E-mail)
Subject: [Tinyos-help] MicaZ ADC resolution for Temp Sensing
Hi,
I'm carrying out some distributed temperature sensing using some MicaZs
and TinyOS 1.15. I want to know if there is a way of having a higher
resolution on the ADC sampling (by possibly using larger variables, or
restricting the dynamic range). The problem is that after conversion, I
only get a resolution of 0.2 Celsius from the thermistors.
Does anyone know how I could improve this?
Thanks, Mike
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