Arduino with hmi Display

We require a program to read voltages and display it in a Nextion HMI Display
With some graphics.


this is to control an amplifier, all is based in Voltage information .

Also some triggers to activate relays .


the controller has all kinds of protections and turns off the amplifier when -
1. when output power is exceeded
2. when reverse power is exceeded
3. when the input power is exceeded
4. when the current consumption is exceeded
5. when the supply voltage is exceeded
6. with the wrong choice of filter band
7. when the temperature is exceeded

attached pictures some examples.