Updating the brain firmware

My team started setting up the brain for our robot, but when we try to connect it to our iPad via Bluetooth, we get the message “firmware is out of date. Update by connecting to Mac iOS or windows.” However, we don’t have a micro usb to lightning cable cord. What are other ways I can update it?

Also please be patient, I just started out.

I also looked at this discussion, and it helped a little. https://www.vexforum.com/t/cant-update-from-brain/92813?u=captainmidnight2008

The V5 brain can only updated by connecting to a Mac or PC using a USB cable, we do not support firmware updates from iPad.