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By SignificantBat0
Hi all,

I realized only after buying the OpenLog Artemis that retrieval of data requires that I physically remove the microSD card. I'm planning on enclosing the OLA inside of a robot as a headless datalogger for an IMU that I've synchronized with other sensors on board. It would be great if USB could be used to move the CSV files from the OLA to my PC instead of only being used for configuration. Is there any version of the firmware that allows this functionality?
User avatar
By liquid.soulder
Since the Apollo3 doesn't support USB natively the best you could do is have a menu option that streams the CSV data out via Serial, and use a serial monitor program on your PC to record the data. I will check with the OLA engineers to see if this is a possibility.

The other option may be to use BLE to wirelessly transfer data, though BLE is much slower than classic Bluetooth. There are some GATT profiles designed to transfer files. You could begin looking through the ArduinoBLE API, as it will soon be supported on Artemis.
User avatar
By SignificantBat0
This all sounds promising. My coding skills are ... limited, to say the least.

That said, the ability to stream the contents of SD card files over USB would be a great solution. To correct my original post, I'm actually hoping to stream raw serial logs out as BIN files to be converted in post. BLE sounds fine as well, though I'm probably going to be transferring relatively large files (each file will contain data throughput of ~50kbps for 20 minutes at a stretch), and the transfer speed limitations might be an issue.
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