Issue with using Core in a new Sparkfun Battery Shield

[mdma]

Determining the version of system firmware on a Photon/P1

Here’s how you can determine what version of system firmware is installed on your device: connect your device to your computer with a USB cable press the SETUP button for 3 seconds to enter setup mode. using a serial monitor such as PuTTY (Windows) or screen (linux/OSX), to connect to the device press ‘v’ - this prints the system version, e.g. 0.4.5 If this produces no output, then you most likely have an older version (pre 0.4.4) that doesn’t support this command. Instead, press s…