The SparkFun USB UART Breakout featuring the CY7C65213 is a compact and versatile USB to UART converter module. This component is essential for projects that require a bridge between USB communications and serial UART interfaces, commonly found in microcontrollers and other serial devices. It is widely used for serial communication, debugging, and programming hardware through a USB interface.
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This circuit features an ESP32 CAM module interfaced with an IR sensor and a SparkFun USB UART Breakout board. The ESP32 CAM provides power to the IR sensor and receives its output signal, likely for processing or triggering camera actions based on IR detection. The USB UART Breakout board is connected to the ESP32 CAM for serial communication, enabling programming, debugging, or data exchange with a computer.
This circuit connects an FTDI USB-to-serial converter to a standard serial interface via a J26 connector. It facilitates serial communication by linking the ground, transmit, receive, data terminal ready, and request to send signals between the FTDI chip and the J26 connector.
This circuit features an ESP32 CAM module interfaced with a SparkFun USB UART Breakout for serial communication, allowing the ESP32 to communicate with a computer or other USB host. A BC547 transistor is used to control an LED, with the base driven by one of the ESP32's GPIO pins through a resistor, and multiple piezo sensors are connected to the transistor's emitter, likely for sensing vibrations or impacts. The 5V Adapter provides power to the ESP32 and the LED, while the ground connections are shared among the components.
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.
Programming devices without a dedicated USB interface
Bridging communication between a PC and a serial device
Technical Specifications
Key Technical Details
USB Interface: USB 2.0 Full-Speed Compatible
UART Interface: Supports UART signaling with baud rates from 300 bps to 3 Mbps
Voltage Levels: 3.3V logic level (5V tolerant)
Current Rating: 25 mA drive strength on UART interface pins
Operating Temperature: -40°C to +85°C
Pin Configuration and Descriptions
Pin Number
Name
Type
Description
1
GND
Power
Ground connection
2
CTS
Input
Clear to Send, UART flow control
3
VCC
Power
Power supply (3.3V to 5V)
4
TXD
Output
Transmit Data, UART transmit signal
5
RXD
Input
Receive Data, UART receive signal
6
DTR
Output
Data Terminal Ready, control signal
7
DSR
Input
Data Set Ready, control signal
8
RI
Input
Ring Indicator, control signal
9
NC
-
No Connection
Usage Instructions
How to Use the Component in a Circuit
Powering the Module: Connect the VCC pin to a 3.3V or 5V power supply, and the GND pin to the ground.
Connecting UART Lines: Connect the TXD pin of the module to the RXD pin of your microcontroller and the RXD pin to the TXD pin of the microcontroller.
Flow Control (Optional): If required, connect the CTS and DTR pins for hardware flow control.
USB Connection: Connect the module to a computer using a USB cable. The computer should recognize the device and assign a COM port.
Important Considerations and Best Practices
Ensure that the power supply voltage matches the requirements of the module (3.3V to 5V).
Always cross-connect TXD and RXD lines—TXD to RXD and RXD to TXD.
Use proper ESD precautions when handling the module to prevent damage.
Install the necessary drivers for the CY7C65213 chip on your computer to ensure proper communication.
For Arduino users, select the correct COM port in the Arduino IDE when programming or communicating with the board.
Troubleshooting and FAQs
Common Issues
Device Not Recognized: Ensure that the drivers are installed correctly and that the USB cable is functioning.
No Communication: Check the TXD and RXD connections, and ensure that the baud rates of the module and the microcontroller match.
Intermittent Communication: Verify that there is no power supply instability and that the flow control settings are correct if used.
Solutions and Tips for Troubleshooting
Driver Installation: Visit the SparkFun or Cypress website to download and install the latest drivers for the CY7C65213 chip.
Cable Check: Use a different USB cable to rule out cable issues.
Baud Rate Matching: Double-check the baud rate settings in your software and ensure they match the settings of the device you're communicating with.
FAQs
Q: Can I use this module with a 5V microcontroller?
A: Yes, the module is 5V tolerant, but ensure that the VCC is supplied with the correct voltage.
Q: What operating systems are compatible with this module?
A: The module is compatible with Windows, macOS, and Linux, but ensure that the appropriate drivers are installed.
Q: How do I change the baud rate?
A: The baud rate can be changed through the serial communication software or by configuring the UART settings in your microcontroller code.
Q: Does the module require any external software?
A: No external software is required for basic operation, but drivers are needed for the module to be recognized by your computer.
For further assistance, consult the SparkFun forums or the Cypress CY7C65213 datasheet for more detailed information.
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