waterlevel-software/documentation/error_codes.md

Error codes

1. Voltage Low
2. Voltage High
3. Current low
4. Current high

else if (voltage_low) { display_error_code(1); } else if (voltage_high){ display_error_code(2); } else if (current_low) { display_error_code(3); } else if (current_high){ display_error_code(4); }