Micro Tracker based on EFM32G210 MCU with
General usage for wild animals tracking but possible use for child, bicycles and so on.
EFM32 MCU extra low consumption provide long time to standalone time.
Currently use microsoft azure to collect and visualize data
Source codes will be published on github.
I add Energy Profile screenshorts with short descriptions (all timing reduce).
1. Sleep mode - use Deep Sleep for flash chip and Sleep for accelerometer, GPS backup only (9 - 10 uA)
Total consumption 18.5 uA
2. MCU wakeup, makes 2 flashes with LED, set clock to 1MHz and measure activity index on accelerometer data.
Total consumption 210 uA.
3. MCU clock set to 7MHz
Total consumption 542 uA
4. Power on GPS (in this example w/o antenna and only for 5 seconds)
Total consumption 27 mA but really can up to 60-65 mA (depends from GPS module type)
5. Set clock to 1MHz, save position and other parameters to flash chip, calculate sleep interval for next wakeup
Total consumption 325 uA
6. And now go to sleep mode EM2 + RTC
Total consumption 18.5 uA (with GPS backup 9-10 uA)
To be continued...
STK3700 used to measure consumption and debugging.
Competitor here for the Low Power Contest. That's an awesome project! I'd love to see this become a finished product, and not even just for wild animals, this is the kind of thing I'd like to see for house pets too, I'm curious as to what my cat actually does during the day, and where he goes. It certainly looks small enough and light enough to be put on a collar from time to time.
One kudos to you! Good luck with the competition!
I make tests and Holland cat can go away from home up to 20-25 km.
If you want i can send one device for you - you need make collar and nano-SIM card with only GPRS enable.
20-25km? Now that is one amazing cat... I'm sure mine doesn't go as far. If you need a hand for betatesting, let me know! I'd love to see what this device can do
If you really wants - send your post address to email@example.com
I'll send within 1 week.
Also you can register on http://vell.azurewebsites.net/ and see scheduler and device settings.
This is one cool project! Did you ever publish the code on GitHub?