Power Management Unit SDK for unstable supply source.
It manages all registered devices sleeping mode according to their individual power level threshold.
If the power level of the environment is lower than the threshold it makes a device sleep. If the power level is equal or over the threshold, it wakes up a device.
First thing is to register every device. An implementation of the Sleepable interface for every device is required. Examples here mocks/sleepable.
The most advanced use cases are shown as test scenarios in this test group module test/powermu/BalanceTest.cpp.
I have a sensor with a Wi-Fi communication module requires up to 150-300mAh, and the microcontroller with the sensor require less than 50mA.
The battery gets drawn during a few concurrent cloudy days because the charger is based on solar PV panels, because every time I read the sensor I send a report to the backend through the Wi-Fi network.
With this Power Management Unit I can disable the Wi-Fi communication module when the power level is under 50% for example. I'm keeping the sensor readings until a few sunny hours charge my battery at least 50%, and then I'm sending all kept reports together to the backend.
There is an Arduino library based implementation in ./arduino.
To prepare the files for this Arduino library, go to this directory and execute
make. It creates a subdirectory in ./arduino/prebuild
with the directory of the library itself ./arduino/prebuild/PowerManagementUnit
To install the library move the ./arduino/prebuild/PowerManagementUnit to your Arduino Libraries directory.
My C programming journey is based on Test-Driven Development for Embedded C by James W. Grenning. A great book to learn much more than advanced C programming.
GNU General Public License (GPLv3). Read the attached license file.
Jaume Mila Bea [email protected]_