Hey robtillaart. the documentation is not very accurate but here is what I think:
- definitely Celsius,
- how accurate? --> well, it's rounded to 1 °C
- Does it measure temperature of the GSM chip (overheating calls smiley-wink or the environment? --> no idea, I get a pretty constant value all the time but I'm not doing anything major with the GSM board. I'll check again when I do some uploads
What I forgot to mention in my first post is that the response from the board:
<mode>,<voltage>,<temperature> is from the documentation. I don't know why there are only 2 parameters but since the current ambient temperature is 21°, the second parameter is probably <temperature>. If you send the command
AT+QTEMP=? then you get:
Sending command: AT+QTEMP=?
+QTEMP:<mode>(0,1),<Temperature>(-40 - 90))
Also form documentation:
<Mode> = 1 if enabled.
<voltage> The current voltage of the temperature sensitive resistor(mV)
<temperature> The current temperature of the temperature sensitive resistor
Range is from -40 to 90(℃)
I'm using the GSM shield for data upload from a remote (outside) location. I already measure the ambient temperature outside my box but I thought of using this sensor values for inside box temperature measurement (nice to have but not necessairy).