Argon Read ADC Analog Pins Simultaneously

Firmware
1

I would like to read the Argon's ADC pins A0 and A1 at a 1000 Hz sample rate using timer and interrupt to then be outputted to the serial port.

2

In order to sample at that rate you'll need to use DMA mode of the nRF52850 MCU. You can use this library.

See the 2 channel example for how to read from two ADC at the same time.