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

The SIM7600CE-T, manufactured by RFrobots, is a 4G LTE module designed for high-speed data communication and IoT applications. It supports multiple communication protocols, including GSM, GPRS, and HSPA+, making it a versatile solution for projects requiring reliable connectivity. Additionally, the module features GPS functionality, enabling precise location tracking, which is ideal for remote monitoring, asset tracking, and smart devices.

• IoT devices and smart systems
• Remote monitoring and control
• GPS-based tracking systems
• Industrial automation
• Smart agriculture
• Vehicle telematics

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

1. Power Supply: Connect the VCC pin to a stable 3.8V power source and GND to ground. Ensure the power supply can handle peak currents of up to 2A.
2. UART Communication: Connect the TXD and RXD pins to a microcontroller or computer for serial communication. Use a level shifter if your microcontroller operates at 5V logic levels.
3. Power On: Use the PWRKEY pin to turn the module on. Pull the PWRKEY pin low for at least 1 second to power up the module.
4. SIM Card: Insert a valid SIM card into the SIM card slot and connect the SIM_VDD, SIM_DATA, SIM_CLK, and SIM_RST pins as required.
5. Antenna: Attach a 4G LTE antenna to the module's antenna connector for optimal signal reception.
6. GPS Functionality: Connect the GNSS_TXD and GNSS_RXD pins to a microcontroller for GPS data communication. Attach a GPS antenna to the GNSS antenna port.

• Use decoupling capacitors near the VCC pin to stabilize the power supply and reduce noise.
• Ensure proper grounding to avoid communication errors.
• Use an external level shifter if interfacing with 5V logic devices.
• Place the antennas in a location with minimal interference for better signal quality.
• Avoid powering the module directly from a microcontroller's power pin, as it may not provide sufficient current.

Below is an example of how to connect the SIM7600CE-T to an Arduino UNO and 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 number
  delay(1000);
  sim7600.println("Hello from SIM7600CE-T!"); // SMS content
  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 power supply provides a stable 3.8V and can handle peak currents of 2A.
   • Check the PWRKEY pin connection and ensure it is pulled low for at least 1 second.

2. No Network Connection

   • Verify that the SIM card is inserted correctly and is active.
   • Check the antenna connection and ensure it is securely attached.
   • Use the AT+CSQ command to check signal strength. A value of 10 or higher is recommended.

3. GPS Not Working

   • Ensure the GPS antenna is connected and placed in an open area with a clear view of the sky.
   • Use the AT+CGNSPWR=1 command to enable GPS functionality.

4. Communication Errors

   • Verify the UART connections and baud rate settings.
   • Use proper grounding and shielding to reduce noise.

Q: Can the SIM7600CE-T work with 5V microcontrollers?
A: Yes, but you must use a level shifter to convert the 5V logic levels to 3.3V for UART communication.

Q: How do I check if the module is connected to the network?
A: Use the AT+CREG? command. A response of +CREG: 0,1 or +CREG: 0,5 indicates a successful connection.

Q: What is the maximum data rate supported by the module?
A: The SIM7600CE-T supports LTE Cat-4 with a maximum downlink speed of 150 Mbps and uplink speed of 50 Mbps.

Q: Can I use the module for voice calls?
A: Yes, the SIM7600CE-T supports voice calls. Use the ATD command to dial a number.

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