Required Electrical Engineering,Electronics,C Programming,Arduino freelancer for Digital Ammeter Using Arduino job

I'm trying to create a 400 amp DC current Digital Ammeter using the Arduino Nano. This should be a walk in the park for a formally trained Engineer. It shouldn't take more than a day or two. I have one code for it already, it can either be reviewed and verified or you can replace it completely. The parts list are as follows:

1. Arduino Nano
2. ADS1115 16bit ADC
3. UGN3503UA Linear hall effect sensor or 400amp current sensor or wound current transformer. I'd prefer the 400amp closed or open circular current sensor I have no desire to use a shunt or cut into the wire being measured.
4. Ferrite Toroid
5. SSD1306 128x32 OLED display 6)LM358 Operational Amplifier

and whatever else is need to get the job done. I'm willing to negotiate the price.

Skills & Expertise Required