The product is designed to connect with the vehicle's ECU, enabling functions like toggling the vehicle's ignition On/Off and activating features such as RPM UP, DOWN, and PTO using toggle switches. Additionally, these functions can be controlled using specific switches on the remote control.

Through a touch-screen display, real-time monitoring of sensor values during vehicle operation is possible. It also offers the capability to detect sensor anomalies and modify sensor parameter values. These adjusted parameters are stored in the EEPROM for future reference. Moreover, the EEPROM is programmed to automatically retrieve stored parameters upon powering on.

Before hardware design, I analyzed the characteristics of sensors required for the system and the features of the system controlled through PCB connections. I identified the necessary requirements for communication protocols and interfaces such as CAN, I2C, GPIO, and USART, and incorporated them into the design.

CAN : I established the CAN communication connections for data exchange with other controllers.
I2C : Utilizing I2C communication, I integrated an ADC module with 16-bit resolution.
GPIO : Designed considering the number of ports required for sensors and external devices.
USART : Implemented communication with the touch-screen display.

In addition, the system can receive input from external toggle switches via GPIO. It reads the status of external buttons attached to the toggle switches or wireless remote, activating relays to send signals to the vehicle's ECU. This allows functions such as ignition control (On/Off), RPM adjustments (UP/Down), and activation of the Power Take-Off (PTO) feature.

A touch-screen display is integrated, enabling real-time monitoring of various sensor states and adjustment of sensor settings.

Please note that the phrasing has been adjusted for clarity and smoothness.

The firmware development was conducted using Simulink, and custom S-Function blocks in C language were developed for devices such as CAN, I2C, EEPROM, and touch-screen displays, as needed.

The programming was divided into three main parts

Switch Input and Processing : Handling operations based on switch input states.
CAN Communication : Communication with other connected controllers.
Display : Displaying sensor values and allowing adjustment of settings, providing necessary information to the user.

These techniques were programmed and tested on the MCU using MATLAB and Simulink.

I utilized Nextion's touch-screen display. I designed various screens using Nextion's proprietary tool and implemented the ability to input passwords and parameter values using provided commands.

I also designed buttons and screen components using Photoshop (allowing for potential modifications in the future).

By mastering the basic tools and commands provided by Nextion, diverse display configurations can be created. It's a product I personally recommend.