Here are Some hardware question following schematic and specification. https://www.arduino.cc/en/Main.ArduinoBoardMKRFox1200 https://www.arduino.cc/en/uploads/Main/MKRFox1200-schematic.pdf
Vbat range: “AA or AAA’’. What are the high and low limits for voltage range? ( destruction for high and SAMD21 behaviour for low)
Analog input: Could you confirm that internal ADC Is referenced to AVREF. If we plan to use it, do we need to connect it to external ref ? 3V3 could be used?
Schematic: I open eagle design files and I don’t understand why Vbatt has two net names : VBATT/2.5A and VBATT/1.4C. In schematic I understand they are not connected. In layout I see they are connected. Thus PB08_AIN3 is used to monitor battery with resistor voltage factor = 33/(68+33)=0.326
voltage monitor: To use this input for battery voltage monitorg, do we need to use code : analogRead(ADC_BATTERY) or analogRead(A3) and performed scaling conversion ( Vref= ? ; 1024bit ; 0.326 ratio see above)