How to Use SIM7600CE-T: Examples, Pinouts, and Specs

The SIM7600CE-T is a 4G LTE module manufactured by RFrobots, designed to support a wide range of communication protocols, including GSM, GPRS, and HSPA+. This versatile module is ideal for Internet of Things (IoT) applications, offering high-speed data transmission and integrated GPS functionality. Its compact design and robust features make it suitable for applications such as remote monitoring, industrial automation, vehicle tracking, and smart city solutions.

• IoT Devices: Enables reliable communication for smart devices.
• Vehicle Tracking: Provides GPS functionality for fleet management.
• Remote Monitoring: Ideal for industrial and environmental monitoring systems.
• Smart Cities: Supports applications like smart meters and connected infrastructure.
• Wireless Communication: Facilitates high-speed data transfer in embedded systems.

The SIM7600CE-T module has multiple pins for communication and control. Below is a summary of the key pins:

1. Power Supply: Ensure the module is powered with a stable voltage between 3.4V and 4.2V (typical 3.8V). Use a low-noise power source to avoid interference.
2. Antenna Connections: Connect the main antenna to the ANT_MAIN pin and the GPS antenna to the ANT_GPS pin for optimal performance.
3. UART Communication: Connect the TXD and RXD pins to the corresponding UART pins of your microcontroller or development board (e.g., Arduino UNO).
4. Power On: Pull the PWRKEY pin low for at least 1 second to turn on the module.
5. Network Configuration: Use AT commands to configure the module for your specific application (e.g., setting APN for LTE connectivity).
6. Data Transmission: Send and receive data using the UART or USB interface.

• Antenna Placement: Place antennas away from high-frequency noise sources to ensure reliable communication.
• Power Stability: Use decoupling capacitors near the power pins to minimize voltage fluctuations.
• Heat Dissipation: Ensure proper ventilation or heat sinking if the module operates in high-temperature environments.
• Firmware Updates: Periodically check for firmware updates from RFrobots to ensure optimal performance and security.

Below is an example of how to use the SIM7600CE-T with an Arduino UNO to send an SMS:

#include <SoftwareSerial.h>

// Define pins for SoftwareSerial
SoftwareSerial sim7600(10, 11); // RX, TX

#define PWRKEY 9 // Power key pin

void setup() {
  pinMode(PWRKEY, OUTPUT);
  digitalWrite(PWRKEY, LOW); // Pull PWRKEY low to power on the module
  delay(1000);              // Wait for 1 second
  digitalWrite(PWRKEY, HIGH);

  sim7600.begin(9600); // Start communication with SIM7600CE-T
  Serial.begin(9600);  // Start communication with PC

  delay(5000); // Wait for the module to initialize

  // Send an SMS
  sim7600.println("AT+CMGF=1"); // Set SMS mode to text
  delay(1000);
  sim7600.println("AT+CMGS=\"+1234567890\""); // Replace with recipient's phone number
  delay(1000);
  sim7600.println("Hello, this is a test message from SIM7600CE-T!"); // Message content
  delay(1000);
  sim7600.write(26); // Send Ctrl+Z to send the SMS
}

void loop() {
  // Forward data from SIM7600 to Serial Monitor
  if (sim7600.available()) {
    Serial.write(sim7600.read());
  }

  // Forward data from Serial Monitor to SIM7600
  if (Serial.available()) {
    sim7600.write(Serial.read());
  }
}

1. Module Not Powering On

   • Ensure the PWRKEY pin is pulled low for at least 1 second.
   • Verify the power supply voltage is within the 3.4V to 4.2V range.

2. No Network Connection

   • Check the antenna connections and ensure they are securely attached.
   • Verify the SIM card is properly inserted and has an active data plan.
   • Use the AT+CSQ command to check signal strength (higher values indicate better signal).

3. GPS Not Working

   • Ensure the GPS antenna is connected to the ANT_GPS pin.
   • Use the AT+CGNSPWR=1 command to enable GPS functionality.

4. AT Commands Not Responding

   • Verify the UART connections between the module and the microcontroller.
   • Ensure the baud rate matches the module's default (9600 bps).

• Q: Can the SIM7600CE-T work with 5V logic levels?
  A: No, the module operates at 3.3V logic levels. Use a level shifter if interfacing with 5V systems.

• Q: How do I update the firmware?
  A: Firmware updates can be performed via the USB interface. Refer to RFrobots' official documentation for detailed instructions.

• Q: What is the maximum data rate supported?
  A: The module supports LTE Cat-4 with a maximum downlink speed of 150 Mbps and uplink speed of 50 Mbps.

This concludes the documentation for the SIM7600CE-T module. For further assistance, refer to the official RFrobots datasheet or contact their support team.