The STM32F103RB is a 32-bit microcontroller developed by STMicroelectronics. It is part of the STM32 family and is based on the ARM Cortex-M3 core. This microcontroller is designed for high-performance applications, offering a clock speed of up to 72 MHz, 128 KB of flash memory, and a wide range of peripherals for communication, control, and data processing.
This circuit features an STM32F103C8T6 microcontroller powered by a 3.3V battery, which controls a red LED. The LED is connected to pin A1 of the microcontroller through a 10-ohm resistor to limit the current.
Open Project in Cirkit Designer
This circuit features an STM32F103C8T6 microcontroller interfaced with a membrane matrix keypad for input, an RTC DS3231 for real-time clock functionality, and a 16x2 I2C LCD for display. It controls four 12V geared motors through two MD20 CYTRON motor drivers, with the motor power supplied by a 12V battery regulated by a buck converter. The battery is charged via a solar panel connected through a solar charge controller, ensuring a renewable energy source for the system.
Open Project in Cirkit Designer
This circuit features an STM32F103C8T6 microcontroller interfaced with a Bluetooth HC-06 module for wireless communication and an Adafruit Arcade Joystick for user input. The microcontroller's pins B0 and B10 are connected to the TXD and RXD pins of the Bluetooth module, enabling serial communication, while pins B14 and B15 interface with the joystick's directional controls. The circuit is powered by a battery, with power distribution managed through the microcontroller's 3.3V pin and common ground connections.
Open Project in Cirkit Designer
This circuit features a microcontroller (STM32F103C8T6) interfaced with a SIM900A GSM module, an HC-SR04 ultrasonic sensor, a water level sensor, and a LoRa Ra-02 SX1278 module for long-range communication. The STM32F103C8T6 is configured to communicate with the GSM module and LoRa module via serial connections, and it reads data from the ultrasonic and water level sensors. An FTDI Programmer is connected for programming and serial communication with the microcontroller.
Open Project in Cirkit Designer| Parameter | Value |
|---|---|
| Core | ARM Cortex-M3 |
| Clock Speed | Up to 72 MHz |
| Flash Memory | 128 KB |
| SRAM | 20 KB |
| Operating Voltage | 2.0 V to 3.6 V |
| GPIO Pins | 51 |
| Communication Interfaces | USART, SPI, I2C, CAN, USB |
| Timers | 3 general-purpose, 1 advanced |
| ADC | 12-bit, up to 16 channels |
| Package | LQFP64 (64-pin) |
The STM32F103RB comes in an LQFP64 package with 64 pins. Below is a table summarizing the key pin functions:
| Pin Number | Pin Name | Function(s) |
|---|---|---|
| 1 | VDD | Power supply (3.3 V) |
| 2 | VSS | Ground |
| 10 | PA0 | GPIO, ADC_IN0, WKUP |
| 22 | PB6 | GPIO, I2C1_SCL, USART1_TX |
| 23 | PB7 | GPIO, I2C1_SDA, USART1_RX |
| 31 | PC13 | GPIO, TAMPER-RTC |
| 50 | PA9 | GPIO, USART1_TX |
| 51 | PA10 | GPIO, USART1_RX |
| 64 | NRST | Reset |
For a complete pinout, refer to the STM32F103RB datasheet provided by STMicroelectronics.
The STM32F103RB can be programmed using the Arduino IDE with the STM32 core installed. Below is an example of blinking an LED connected to pin PA5:
// Define the LED pin
#define LED_PIN PA5
void setup() {
// Set the LED pin as output
pinMode(LED_PIN, OUTPUT);
}
void loop() {
// Turn the LED on
digitalWrite(LED_PIN, HIGH);
delay(500); // Wait for 500 ms
// Turn the LED off
digitalWrite(LED_PIN, LOW);
delay(500); // Wait for 500 ms
}
Note: Install the STM32 core in the Arduino IDE by navigating to
File > Preferences, adding the STM32 board manager URL, and installing the STM32 package via the Board Manager.
Microcontroller Not Responding
Programming Failure
Peripheral Not Working
Overheating
Q: Can the STM32F103RB operate at 5 V?
A: No, the STM32F103RB operates at a voltage range of 2.0 V to 3.6 V. Use level shifters for 5 V devices.
Q: How do I reset the microcontroller?
A: Use the NRST pin or issue a software reset command in the firmware.
Q: Can I use the STM32F103RB for USB communication?
A: Yes, the STM32F103RB has a USB 2.0 full-speed interface for communication.
Q: What development tools are recommended?
A: Use STM32CubeIDE, Keil uVision, or the Arduino IDE with the STM32 core for development.
This concludes the documentation for the STM32F103RB microcontroller. For further details, refer to the official datasheet and reference manual provided by STMicroelectronics.