The STM32WB55CGU6 is a dual-core microcontroller manufactured by STMicroelectronics. It features an ARM Cortex-M4 core for high-performance application processing and an ARM Cortex-M0+ core dedicated to managing low-power tasks. This microcontroller integrates Bluetooth 5.0 connectivity, making it an ideal choice for IoT (Internet of Things) applications. It also includes a wide range of peripherals, such as ADCs, timers, and communication interfaces, to support diverse use cases.
This circuit features an STM32F103C8T6 microcontroller interfaced with a China ST7735S 160x128 display and two spectral sensors (Adafruit AS7262 and AS7261). It also includes two pushbuttons for user input, with the microcontroller managing the display and sensor data processing.
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 integrates an STM32F4 microcontroller with a GPS module (NEO 6M), an accelerometer and gyroscope (MPU-6050), a barometric pressure sensor (BMP280), and a compass (HMC5883L). The microcontroller communicates with the sensors via I2C and the GPS module via UART, enabling it to gather and process environmental and positional data.
Open Project in Cirkit Designer
This circuit features an STM32F103C8T6 microcontroller as the central processing unit, interfacing with various sensors and output devices. It includes an MQ-4 methane gas sensor and an MQ135 air quality sensor for environmental monitoring, both connected to analog inputs. The circuit also controls a buzzer via a BC547 transistor, indicating certain conditions, and displays information on a 16x2 I2C LCD. Turbidity measurement is facilitated by a dedicated module, and a red LED indicates operational status or alerts, with resistors for current limiting and capacitors for power supply stabilization.
Open Project in Cirkit Designer| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Part Number | WB55CGU6 |
| Core Architecture | Dual-core: ARM Cortex-M4 (application) and ARM Cortex-M0+ (network) |
| Operating Frequency | Cortex-M4: Up to 64 MHz, Cortex-M0+: Up to 32 MHz |
| Flash Memory | 1 MB |
| RAM | 256 KB |
| Bluetooth Version | Bluetooth 5.0 (Low Energy) |
| Operating Voltage | 1.71 V to 3.6 V |
| GPIO Pins | Up to 43 |
| Communication Interfaces | I2C, SPI, UART, USB 2.0, CAN, and more |
| ADC Resolution | 12-bit |
| Operating Temperature Range | -40°C to +85°C |
| Package Type | UFQFPN48 (48-pin) |
The STM32WB55CGU6 comes in a 48-pin UFQFPN package. Below is a summary of key pins and their functions:
| Pin Number | Pin Name | Function Description |
|---|---|---|
| 1 | VDD | Power supply (1.71 V to 3.6 V) |
| 2 | VSS | Ground |
| 3 | PA0 | GPIO/ADC input/Timer input |
| 4 | PA1 | GPIO/ADC input/Timer input |
| 5 | PB6 | I2C1_SCL (I2C clock line) |
| 6 | PB7 | I2C1_SDA (I2C data line) |
| 7 | PC13 | GPIO/External interrupt |
| 8 | NRST | Reset pin |
| 9 | BOOT0 | Boot mode selection |
| 10 | PB3 | SPI1_SCK (SPI clock line) |
| ... | ... | ... (Refer to the datasheet for full details) |
Although the STM32WB55CGU6 is not directly compatible with Arduino UNO, it can communicate with an Arduino via UART. Below is an example of how to send data from the STM32WB55CGU6 to an Arduino UNO:
STM32WB55CGU6 Code (Using HAL Library):
#include "stm32wbxx_hal.h"
// UART handle declaration
UART_HandleTypeDef huart1;
void SystemClock_Config(void);
void MX_USART1_UART_Init(void);
int main(void) {
HAL_Init(); // Initialize the HAL Library
SystemClock_Config(); // Configure the system clock
MX_USART1_UART_Init(); // Initialize UART1
char message[] = "Hello from STM32WB55CGU6!\r\n";
while (1) {
// Transmit message over UART
HAL_UART_Transmit(&huart1, (uint8_t *)message, sizeof(message) - 1, HAL_MAX_DELAY);
HAL_Delay(1000); // Wait for 1 second
}
}
// UART1 initialization function
void MX_USART1_UART_Init(void) {
huart1.Instance = USART1;
huart1.Init.BaudRate = 9600;
huart1.Init.WordLength = UART_WORDLENGTH_8B;
huart1.Init.StopBits = UART_STOPBITS_1;
huart1.Init.Parity = UART_PARITY_NONE;
huart1.Init.Mode = UART_MODE_TX_RX;
huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
huart1.Init.OverSampling = UART_OVERSAMPLING_16;
HAL_UART_Init(&huart1);
}
Arduino UNO Code:
void setup() {
Serial.begin(9600); // Initialize Serial communication at 9600 baud
}
void loop() {
if (Serial.available()) {
// Read data from STM32WB55CGU6 and print to Serial Monitor
String data = Serial.readString();
Serial.println("Received: " + data);
}
}
Bluetooth Not Working:
Microcontroller Not Booting:
UART Communication Fails:
High Power Consumption:
Q: Can the STM32WB55CGU6 be programmed using Arduino IDE?
A: No, the STM32WB55CGU6 is not natively supported by the Arduino IDE. However, you can use STM32CubeIDE or other compatible tools for development.
Q: Does the STM32WB55CGU6 support over-the-air (OTA) updates?
A: Yes, the STM32WB55CGU6 supports OTA updates via Bluetooth when configured with the appropriate firmware.
Q: What is the maximum range of the Bluetooth module?
A: The Bluetooth range depends on the antenna design and environmental factors but typically ranges from 10 to 50 meters.