Hi, I have a SparkFun OpenLog Artemis, I am using the Vin and GND pins to power it on and have cut the MEAS jumper. When I connect the board to a power supply and power it on, the board does not turn on and start logging unless I have pressed the RST button. Is this normal behavior? I would have expected the board to turn on and start logging once I turned the power supply on. Thanks!
How are you powering it down? The âstop loggingâ feature helps the OLA shut down gracefully⌠It might be getting kicked in deep sleep mode at power off (which requires RST) OpenLog Artemis Hookup Guide - SparkFun Learn
Usually I have been powering it down but turning off the power supply
Hi @blair ,
It sounds like the âNo Power Loss Protectionâ version of the OpenLog Artemis firmware is what you need?
Please see the notes in UPGRADE.md
You can find the special firmware binary here. Click on the download icon to download the binary:
I hope this helps,
Paul
Close the MEAS jumper and try again.
I tried the other firmware. It worked better and started more often when I turned on the power supply, but it did not work every time. I will try keeping the MEAS jumper closed on another board, although I would like to not have it closed in the future so I donât risk powering it on through USB and Vin at the same time.
Hi @blair ,
Thank you for the update. What voltage are you feeding into the VIN pin? VIN is upstream of the 3.3V regulator, so it needs a voltage of 3.6V to 5.0V.
I hope this helps,
Paul
Please also make sure your power source can supply the gulp (inrush) of current needed when the OLA starts up. It varies from SD card to SD card, but some can draw several 100mA at power-on. Maybe your source is dipping, causing the OLA to go into deep sleep / reset?
Best wishes,
Paul
I have been feeding 5.0V into the VIN pin.
I will check to make sure the gulp current requirements from the power supply are being met.
Thanks,
Blair