Interfacing 433Mhz RF Module with STM32F103C8

This wireless telemetry system establishes communication between two separate microcontroller nodes using 433MHz radio frequency (RF) signals. On the transmitting side, an Arduino Uno interfaces with an HC-SR04 ultrasonic sensor to measure distance, processing the raw echo timing data. Using the RadioHead library, the Arduino encodes this sensor data into an RF packet and transmits it via the 433MHz RF Transmitter module. On the receiving end, the STM32F103C8 microcontroller (commonly known as the Blue Pill) listens on the same radio frequency using the 433MHz RF Receiver module. When a valid data packet is captured, the STM32 decodes the payload and formats it for output. The processed distance data is then sent to a 16x2 LCD display wired to the STM32, where a 10k potentiometer adjusts the screen contrast for optimal readability. The entire system relies on breadboards and connecting wires to distribute power and route data lines between the microcontrollers, sensors, RF modules, and display hardware. Powered by the Arduino IDE software ecosystem, the setup demonstrates fundamental wireless data transmission, asynchronous serial or digital pin manipulation, and peripheral integration across different microcontroller architectures.