You will need a USB-C cable to charge your card10. You can also use it as a storage device to read/write files and update software. We plan to provide most of these functions via BLE as well, but a wired connection might still come handy. The charging and file transfer works whichever way round the USB-C cable is plugged in.
Traveler reports agree that the badge uses USB-C, the assumption is that this was chosen over Micro-USB for the available range of extra pins. The reconstruction thus has some extra pins available, which would explain several observations of hardware interHacktions using USB-C.
|Pin Name||Pin Number||Usage||Comment|
|SBU1||A8||SWDIO (GPIO)||Primary use for SWD. Firmware can reconfigure to GPIO|
|SBU2||B8||SWCLK (GPIO)||Primary use for SWD. Firmware can reconfigure to GPIO|
|RX1+||B11||ECG P||ECG P can be switched between this pin and the wristband via firmware|
|TX1+||A2||ECG COM||ECG common mode buffer output.|
|RX2-||A10||UART TX (via Diode)||The diode protects USB tranceivers|
|TX2+||B2||Reset||Pull low to trigger a reset|
!Caution! Most USB-C cables available for sale do not connect all pins of the connector. Whilst this is not a problem for general use, if you want to access the full available I/O contacts, it might be best to choose a cable from the suggestions listed at the bottom of the page.
To use full I/O, there is a ‘correct side up’ for the USB-C cable.
External ECG electrodes can be connected via USB-C with a self-made cable.
Whilst this list does not guarantee you anything, these cables have been bought before and were found to have all contacts connected: - Anker AK-A8183011