Add voltage_tolerance app_option
Add voltage_tolerance app_option

Tolerance should be approximately max_signal*gain/255
(1.4*300/255=1.6 V for gain=300)

wheeler-microfluidics/dmf-control-board-firmware,wheeler-microfluidics/dmf-control-board-firmware,wheeler-microfluidics/dmf-control-board-firmware,wheeler-microfluidics/dmf-control-board-firmware,wheeler-microfluidics/dmf_control_board_plugin