Article: Internal Temperature Sensor on BL602
#1
Here's how we read the Internal Temperature Sensor on PineCone BL602 and PineDio Stack BL604... And transmit to The Things Network via LoRaWAN

Internal Temperature Sensor on BL602
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#2
(10-14-2021, 12:55 AM)lupyuen Wrote: Here's how we read the Internal Temperature Sensor on PineCone BL602 and PineDio Stack BL604... And transmit to The Things Network via LoRaWAN

Internal Temperature Sensor on BL602

I am kind of surprise that BL602 has an internal temperature sensor. Can this sensor been use as ambient temperature measurement?
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#3
(10-14-2021, 07:51 PM)tllim Wrote: I am kind of surprise that BL602 has an internal temperature sensor. Can this sensor been use as ambient temperature measurement?

I don't think the Internal Temperature Sensor can be used for measuring the Ambient Temperature... My readings range between 45 ºC and 50 ºC, something in the BL602 SoC seems to be heating up. (Maybe WiFi?)

Or perhaps I'm not reading the Internal Temperature Sensor correctly.  ?
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#4
(10-14-2021, 08:13 PM)lupyuen Wrote:
(10-14-2021, 07:51 PM)tllim Wrote: I am kind of surprise that BL602 has an internal temperature sensor. Can this sensor been use as ambient temperature measurement?

I don't think the Internal Temperature Sensor can be used for measuring the Ambient Temperature... My readings range between 45 ºC and 50 ºC, something in the BL602 SoC seems to be heating up. (Maybe WiFi?)

Or perhaps I'm not reading the Internal Temperature Sensor correctly.  ?

The value seems reasonable to me.
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#5
If this helps: Here is the Internal Temperature I recorded with PineDio Stack shortly after rebooting.

BL604 is mostly idling, and every 60 seconds it sends the temperature over LoRaWAN to The Things Network...

   
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#6
For quite a few sensors (or at least those of my interest), the system temperature helps calibrate the sensor readings. Load cells need this kind of calibration for weight. If the system is very enclosed, the internal temperature could work... It may also correlate sufficiently with the overall system temperature for the calibration lookups.

But in that application, one of the 8051+eeprom+BLE systems works fine.
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#7
Cool! That's an interesting application of the Internal Temperature Sensor.

FYI: I have recorded the Internal Temperature over a 20-minute period, here's how it looks...[Image: 811a4407f25ba02bf3010a1f826ee67f.jpg]
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