Hi,
I have started using the CC2650STK modules Firmware 1.4 and one of the first tests i performed was to get a level of baseline performance with a battery drain test. I used nodejs and the sensortag library and setup the tag to enable all sensors and report changes.
Originally i thought the battery level which is returned as a percentage would be reasonably close to the actual % left whereby the device would stop working.
However, it seems that the sensors attached to the CC2650STK stop from about 2.5-2.6V and below - although the MCU merily continues at lower voltages. For example the all bar the gyro and barometric sensors seemed to stop reporting. The temperature sensor woudl sometimes report a value of -40 for room temp. Does this match others experiences?
I believe the standard firmware calculates the battery level based off the maximum battery voltage but does not specify a minimum voltage (in effect it uses 0V as the 0%).
Is there a list of the minimum voltages required by each sensor on the CC2650STK, I intend to change the firmware so that is scales the battery level of 0% to the voltage level where sensors will start to either misreport or not report a value.
Jason
