Refine the basic electrical schematic of the transformer controller. It is necessary to add a local indication module (LCD 16×2 I2C or OLED display) connected to the I2C interface of the STM32 microcontroller. The display should show values of current, voltage, temperature, emergency messages, and a settings menu.
It is also necessary to check and align the graphical design of the schematic: all lines should be straight, of the same thickness, without breaks and overlaps. The labels of elements and signals should be brought to a uniform style, and the correctness of power designations (+12V, +5V, +3.3V, GND) should be verified.
Individually check the RS-485 node: the correctness of the MAX485 connection, lines A/B, and the presence of a 120 Ohm terminating resistor. Check the power supply, voltage regulators, filtering capacitors, and the formation of all necessary power levels.
It is necessary to check the relay node for emergency shutdown, transistor control of the relay, and protective diodes. Also, check the channels for measuring current, voltage, and temperature, their connection to the STM32 ADC, and the correctness of signal filtering.
If necessary, an EEPROM can be added for saving settings and an RTC module for event logging and time stamping of emergencies.
