Which GPIO is Best to Connect My Analogue Sensors to on Fermion: BLE Sensor Beacon?

We recommend you to connect to GPIO6, because the GPIO of BLE Sensor Beacon chip cannot exceed 1.6V if it is set to ADC mode, so if your analogue sensor output exceeds 1.6V, we recommend you to connect your sensor to GPIO6 which has the built-in voltage divider resistor.