I ordered & received OLA DEV-19426 (without IMU) a few weeks ago. I would like to log an analog signal via pin 11 and be able to stop logging via pin 32. I had couple issues. One of them is to do with the log file time stamps. I programmed the unit not to log date and time with every data point to keep data rate high but wanted to have the correct file date and time info stored so that I can tell when that file was created. It does not keep the correct date and time. Each time I press the reset button to start data logging, it goes to a date with year 2000.
The other issue is to do with power consumption. When I stop data logging by pulling pin 32 low, the Artemis module is supposed to go to sleep but apparently SDcard power is not getting disconnected which keeps the current drain around 15 mA. This is too high for my application. Reading that logged file date and time stamp issue has been corrected in v1.6 and hoping that MICROSD_PWR line gets pulled high before going to sleep, I tried to upgrade the firmware. I followed the instructions and downloaded “Artemis Firmware Uploader v2.0” and downloaded a firmware that I can find in the downloaded folder. I believe that was not the right one but now I cannot communicate with the board. Any help to solve this issue will be appreciated. Thank you.
We have noticed that on some boards - with some SD cards - the card start-up current (in-rush) can cause the board to reset. If you are still having problems with the board losing the date and time, please try this firmware instead:
As I said in my previous email, I am using pin 32 to stop logging data and put the micro to sleep. With version 2.4, is it supposed to disable the power to microSD card? I do not see any noticeable change in current drain of the board. It hovers around 15 mA when it is active or in sleep. Thank you for your help.
I enabled stop logging by pulling pin 32 low option via the menu.
I disabled the PWR LED during sleep via the menu but noticed that it does not turn off. But with 1K resistor, I am guessing LED does not contribute more that a few mA.
There is nothing connected to Qwiic bus. I did disabled the Qwiic bus via the menu.
I realized I stated it wrong. I do apply power using the vias marked “+” and “-” right on bottom of the LiPo connector.
I also realized that the boards were shipped with firmware version 2.2. I updated them to version 2.4 and now, I do not see the high current drain after stopping data logging. However, it takes two resets to start logging again which is unexpected.