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#RECOMPOSE LIQUID NOTES V1.5.2.1 WIN FULL#
So I will have to re-constitute the full time stamp in post. Only one time stamp is recorded per 12 cycles, as that’s just too many characters to buffer in the limited SRAM (no unix time yet!). (Note: Excel switched to d/m/y here! I always use Y/M/D!) MM/DD/YY HH:MM:SS Cycle# = Toffset ,Vcc(mV), X = Y = Z = ,BMATemp, RTCtemp The sample interval for this series is: 1 minute The current data output looks like this on the SD card: I use somewhat cryptic error codes, as every character passed to the error routine eats into my precious SRAM budget. And finally an error subroutine, which hangs the system in a while(1) if something goes wrong.
#RECOMPOSE LIQUID NOTES V1.5.2.1 WIN SERIAL#
This script automatically creates new data files at an interval determined by comparing the fileInterval to the countlog (thanks adafruit!) There is also a nice #ifdef …#endif trick to control echoing to serial by simply commenting out the ECHO_TO_SERIAL def at the beginning of the code.
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In my power drain tests, using 2xAA batteries as the power supply, this code was completing ~1700 accelerometer/RTC read cycles per 8mv drop on the power supply! If I take a sample every 15 minutes, this projects out to a core data logger unit that uses power on par with the natural self-discharge rate of the batteries! I de-soldered the power led, and removed the battery charging circuit from the RTC board.īefore I post the results of the eeprom buffering experiment, I will just add the updated version of the code that buffers 12 sensor read cycles of data in the internal SRAM before writing to a small 128mb Sandisk SD card.