The below pin assignments have been defined to keep them consistent across all models of the PebblePower products. This means that the firmware for PebblePower1, PebblePower2 and PebblePower4 will be the same. PebblePower8 and PebblePower12 will require additional GPIO’s and multiplexers will be used to achieve this, therefore firmware for PebblePower8 and PebblePower12 “might” be different.