Design with Adafruit PiUART in Cirkit DesignerThe Adafruit PiUART is a UART (Universal Asynchronous Receiver/Transmitter) interface board specifically designed for use with the Raspberry Pi series of single-board computers. This component simplifies the process of connecting UART-compatible devices, such as serial consoles, to the Raspberry Pi's GPIO (General Purpose Input/Output) pins. It is an essential tool for developers and hobbyists who need to establish serial communication between their Raspberry Pi and other hardware components.
This circuit connects a TTL Serial JPEG Camera to a Raspberry Pi 5, enabling the Raspberry Pi to receive image data from the camera via UART communication. The camera's GND, RX, and TX pins are connected to the Raspberry Pi's GND, GPIO 14, and GPIO 15 pins, respectively.
Open Project in Cirkit Designer
This circuit connects a Flora GPS module to a Raspberry Pi 3B. The GPS module is powered by the Raspberry Pi's 3.3V and GND pins, and communicates with the Raspberry Pi via UART using the TX and RX pins.
Open Project in Cirkit Designer
This circuit features an Adafruit QT Py RP2040 microcontroller interfaced with an APDS9960 proximity sensor, an MPU6050 accelerometer and gyroscope, and an OLED display via I2C communication. It also includes a buzzer controlled by the microcontroller and is powered by a 3.7V LiPo battery with a toggle switch for power control.
Open Project in Cirkit Designer
This circuit integrates an Arduino Nano and a Raspberry Pi 4B, with the Arduino Nano's RX pin connected to the Raspberry Pi's GPIO17 for serial communication. Both devices share a common ground and 5V power supply, enabling coordinated operation between the microcontroller and the single-board computer.
Open Project in Cirkit Designer| Pin Number | Name | Description |
|---|---|---|
| 1 | VCC | 3.3V Power Supply Input |
| 2 | TX | Transmit Data (PiUART to Raspberry Pi) |
| 3 | RX | Receive Data (Raspberry Pi to PiUART) |
| 4 | GND | Ground Connection |
Q: Can I use the PiUART with a 5V logic device? A: No, the PiUART is designed for 3.3V logic levels. Use a logic level converter for 5V devices.
Q: How do I change the baud rate on the PiUART? A: The baud rate is set within your Raspberry Pi's software configuration. Refer to the Raspberry Pi's serial interface configuration settings to adjust the baud rate.
Q: Is the PiUART compatible with all Raspberry Pi models? A: The PiUART is compatible with any Raspberry Pi model that has a GPIO header with UART pins available.
Below is an example Python script for sending a simple message through the PiUART to a connected serial device. This script assumes you have already configured the serial port on your Raspberry Pi.
import serial
import time
# Initialize serial connection on the Raspberry Pi
ser = serial.Serial(
port='/dev/serial0', # Replace with the correct serial port if necessary
baudrate=9600, # Set the baud rate to match the connected device
timeout=1
)
# Function to send a message through the PiUART
def send_message(message):
ser.write(message.encode())
# Main loop to send messages periodically
try:
while True:
send_message("Hello from Raspberry Pi!")
time.sleep(2) # Wait for 2 seconds before sending the next message
except KeyboardInterrupt:
ser.close() # Close the serial connection when the script is stopped
Remember to configure the serial port on your Raspberry Pi and install the pyserial package before running the script. Use the command pip install pyserial to install the package if it's not already installed.