How to Use E72-2G4M20S1E (CC2652P): Examples, Pinouts, and Specs

The E72-2G4M20S1E is a compact, low-power wireless module developed by Ebyte Electronic Technology Co., Ltd.. It is based on the CC2652P chip from Texas Instruments, which integrates a powerful ARM Cortex-M4F processor and a high-performance RF core. This module supports multiple wireless communication protocols, including Bluetooth Low Energy (BLE), Zigbee, and Thread, making it ideal for Internet of Things (IoT) applications.

• Smart Home Devices: Zigbee-based smart lighting, thermostats, and security systems.
• Industrial IoT: Wireless sensor networks and industrial automation.
• Wearable Devices: BLE-enabled fitness trackers and health monitoring systems.
• Wireless Communication Gateways: Zigbee-to-Wi-Fi or BLE-to-Wi-Fi bridges.
• Mesh Networking: Applications requiring robust and scalable wireless communication.

The E72-2G4M20S1E module has 32 pins. Below is the pinout description:

Note: For detailed pin mapping and alternate functions, refer to the official datasheet.

1. Power Supply: Connect the VCC pin to a regulated power source (1.8V to 3.8V) and GND to ground.
2. Antenna Connection: Use the onboard PCB antenna or connect an external antenna via the IPEX connector for better range.
3. Programming and Debugging: Use the SWD_CLK and SWD_IO pins to program the module using a compatible debugger (e.g., J-Link or XDS110).
4. GPIO Configuration: Configure the DIO pins as needed for your application (e.g., input, output, or alternate functions).
5. Protocol Selection: Use the appropriate firmware to enable BLE, Zigbee, or Thread communication.

• Power Supply Stability: Ensure a stable power supply with minimal noise to avoid communication issues.
• Antenna Placement: For optimal RF performance, place the antenna away from metal objects and other sources of interference.
• Firmware Updates: Use the latest firmware provided by Ebyte or Texas Instruments to ensure compatibility and performance.
• Heat Dissipation: If operating at high output power (+20 dBm), ensure proper heat dissipation to avoid thermal issues.

Below is an example of how to use the E72-2G4M20S1E module with an Arduino UNO for BLE communication.

#include <SoftwareSerial.h>

// Define RX and TX pins for communication with the module
SoftwareSerial BLEModule(0, 1); // RX = Pin 0, TX = Pin 1

void setup() {
  // Initialize serial communication with the module
  BLEModule.begin(9600); 
  Serial.begin(9600); // For debugging via Serial Monitor

  // Send initialization command to the module
  BLEModule.println("AT+RESET"); 
  delay(1000); // Wait for the module to reset
  Serial.println("Module initialized.");
}

void loop() {
  // Check if data is available from the module
  if (BLEModule.available()) {
    String data = BLEModule.readString();
    Serial.println("Received from module: " + data);
  }

  // Send data to the module
  BLEModule.println("Hello from Arduino!");
  delay(2000); // Wait 2 seconds before sending again
}

Note: Replace the AT+RESET command with the appropriate AT commands for your application.

1. No Communication with the Module:

   • Cause: Incorrect wiring or baud rate mismatch.
   • Solution: Double-check the connections and ensure the baud rate matches the module's configuration.

2. Poor RF Performance:

   • Cause: Antenna placement or interference.
   • Solution: Reposition the antenna and ensure it is not obstructed by metal objects.

3. Module Overheating:

   • Cause: High output power without proper heat dissipation.
   • Solution: Reduce the output power or improve heat dissipation.

4. Firmware Update Fails:

   • Cause: Incorrect programming tool or connection.
   • Solution: Use a compatible debugger and verify the SWD connections.

• Q: Can the module operate on 5V?

  • A: No, the module operates within a voltage range of 1.8V to 3.8V. Use a voltage regulator if needed.

• Q: Does the module support Wi-Fi?

  • A: No, the module supports BLE, Zigbee, and Thread but not Wi-Fi.

• Q: How do I switch between BLE and Zigbee?

  • A: The communication protocol is determined by the firmware. Flash the appropriate firmware to switch protocols.

• Q: Can I use this module for mesh networking?

  • A: Yes, the module supports Zigbee and Thread, which are ideal for mesh networking applications.