NEO-M8U sensors are recalibrated every time it is powered up and the vehicle is expected to make certain calibration movements. This means the vehicle will spend some time before starting to get sensor measurements.
We would like to fix calibration data once and for all after we install the module in the vehicle.
From what i understand from the datasheet, we can use V_BCKP for this but 15uA typical consumption is too much for our application. It is a huge drain in our battery which is expected to last for 20 years or so.
But we have some other advantage; we know main power is off and the module is alive for at least 10 more seconds. We want to know if it is possible to save sensor calibration data into NEO-M8U flash during this period.
Our question in summary :
Can we use "UPD-SOS Create Backup File in Flash" command to retain sensor calibration settings ? If we save BBR memory right before power-down, could the module wake up with calibrated sensors ?