SIM7600G-H 4G HAT (B)

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SIM7600G-H 4G HAT (B)
SIM7600G-H 4G HAT (B)





  • Connected via pogo pin or MicroUSB connector.
    • Dedicated pogo pin for Raspberry Pi Zero/Zero W.
    • MicroUSB connector for other Raspberry Pi boards or PC.
  • Incorporates SIM7600G-H global band 4G module, compatible with 2G/3G/4G network with global support.
  • USB HUB connector for other Raspberry Pi boards or PC, providing USB extension and 4G network access.
  • Supports dial-up, telephone call, SMS, TCP, UDP, DTMF, HTTP, FTP, etc.
  • Supports GPS, BeiDou, Glonass, and LBS base station positioning.
  • SIM card slot, supports 1.8V/3V SIM card.
  • Onboard audio jack and audio decoder for making the telephone calls.
  • 2 x LED indicators, easy to monitor the operating status.
  • Control via AT commands (3GPP TS 27.007, 27.005, and V.25TER command set).
  • Supports SIM application toolkit: SAT Class 3, GSM 11.14 Release 99, USAT.
  • Comes with development resources and manual (examples for Raspberry Pi).


  • To test this device, you should prepare the following components:
SIM7600G-H 4G HAT (B) × 1
LTE Antenna × 1
GPS Antenna × 1
USB-A to micro-B cable × 1
4G SIM card × 1
An earphone with a microphone × 1 (optional)
  • Insert the activated 4G SIM card and the earphone(optional) to the HAT when the HAT is power off, and then connect it to the PC by the USB cable.
  • The PWR indicator turns on after connecting.
  • When the NET light starts to flash once every second, the module starts to work.
SIM7600 4G HAT(B)TOP ang BOTTOM.png
  • Check the Device Manager of PC, the several COM ports will be recognized:
  • If the COM ports are recognized with an exclamation symbol, you should install the SIM7600X Driver manually.
  • Connect the 4G HAT to Windows PC (Hereafter we use Windows 10 PC as example))
  • Unzip the driver file --> Double-click the exe driver file with the left mouse button --> Select the installation path --> NEXT --> Wait for the installation to complete --> Restart the computer --> Complete the driver installation.
  • After installation, all the devices should be recognized normally as below:

SIM7600X-Driver- (6).png

NET working status

Reference of indicators


AT commands for testing

AT Command Description Return
ATE ATE1: Echo mode on
ATE0: Echo mode off
AT+CGMI Request manufacturer indentification OK
AT+CGMM Request model indentification OK
AT+CGSN Request product serial number identification OK
AT+CSUB Request porduct version OK
AT+CGMR Request firmware version OK
AT+IPREX Configure buad rate of model +IPREX:OK
AT+CRESET Reset model OK
AT+CSQ Query signal quality OK
AT+CPIN? Query SIM card status +CPIN:RRADY
AT+COPS? Query provider information +COPS:OK
AT+CREG? Query network registation status +CREG: OK
AT+CPSI? Query UE system information
AT+CNMP Select Network Mode:

2: Automatic
13: GSM only
38: LTE only
48: Any modes but LTE <nr /> ....


For more information about the AT command, you can refer to AT command manual.

SIM7600X H 01.png

Dial-up Networking

【Note】:You must use a SIM card with GPRS networking enabled and haven't out of service.

Dial-up Networking with Windows PC

  • Connect the SIM7600G-H 4G HAT (B) with the 4G SIM card to your win10 PC. After installing the driver, the PC will automatically recognize the module.
  • If Windows PC still cannot access the Internet, you need to start NDIS dial-up manually.

Open the SIM7600 AT port and send the command:


And then press 'Enter'. At this time, NDIS dialing will take effect, and the PC can connect to the network.

Sim8200 win sendat1.png.png
  • If you still can’t connect automatically, you can use PPP dial-up. The operation steps are as follows:

GPS debugging

  • Plugin the GPS antenna and place the 4G HAT in an open outdoor (note that it cannot be tested in rainy weather). It takes about 1 minute to receive the positioning signal after power-on;

The test commands and screenshots are as follows:

AT+CGPS=1	       //Open GPS
AT+CGPSINFO          //Print GPS information to the serial port
AT+CGPS=0          //Close GPS
SIM7600G-H 4G HAT(B) GNSS.png

Make calls and answer

  • Insert the SIM card, connect the LTE antenna and connect the USB interface of SIM7600E-H 4G HAT to PC, Then press the PWRKEY to power on the boardl
  • Check whether the indicators blink correctly (PWR's and NET's flashes)
  • Send AT commands as bellow:
Commands Description Return
AT+CNUM Phone number (only supported by some SIM cards) +CNUM OK
AT+CSDVC AT+CSDVC=1: Handset output
AT+CSDVC=3: Speaker output
AT+CLVL=? Check volume level OK
AT+CLVL=2 Volume level set to 2 OK
ATD<phone_number>; Make calls OK
AT+CHUP Hang up call OK
AT+CLIP=1 Phone ring OK
ATA Answer call OK

Voice output mode and volume adjustment

AT+CSDVC=1 		//Switch to earphone
AT+CSDVC =3 	        //Switch to speaker
AT+CLVL =?		//Query the volume range. If it returns +CLVL: (0-5), it means that the volume is adjustable from 0 to 5
AT+CLVL=2     	        //Set the volume to 2, return to OK

Answer the phone

Display the serial port of incoming call: RING
Send "ATA"                  //Answer the call
Send "AT+CHUP"               //Hang up the call

Audio parameter debugging

+CACDBFN: (Handset_cal.acdb,Handset_tianmai.acdb)	// It is recommended to consider setting this set of parameters
  • In the initialization phase of the module startup, before making a call, add the following
AT^PWRCTL=0,1,3		// Improve TDD noise effect
  • During the establishment of a voice call
VOICE CALL:BEGIN      // Module call establishment and execution to improve call effect
AT+CECM=1        //Echo suppression processing
AT+CECH=0x500       //Improve the volume effect of the mobile phone

For more details, please check the file of "SIM7X00_Audio_Application_Note".

Send the massage

  • 1. Plug the SIM card, connect the LTE antenna and connect the USB interface of the 4G HAT to PC, and power on the device.
  • 2. Check whether the indicators blink correctly: the PWR indicator is always on, and the NET indicator is flashing.
  • 3. Send AT commands as bellow:
AT+CMGF=1     //Set the massage mode to TEXT;
  • 4.Enter AT+CMGS="phone number" and then press <Enter> to set the recipient's mobile phone number, then this command will return: ">". And then you can enter the content to be sent, such as "Send message test!", and don't need to check 'AddCrLf'. After editing the message, send the information in HEX format, enter 1A in the send box, and then click SEND. After sending successfully, the module will return +CMGS: 15. You can see in the picture below:

【Note】: 1A is the key value of "CTRL+Z", which is used to tell the module to perform the sending operation. You can also send 1B that is "ESC'" to cancel the current operation.


Receive the massage

  • 1. Send a message with your phone, such as "This is a receive test for SIM7600X!" to the module.
  • 2. When receiving the information, the serial port will automatically report the information, "SM", 20, which means there are 20 messages in the SM, and the message just sent is the 20th message.
  • 3. Read the massage:
AT+CMGR=20     //Read the 20th information (AT+CMGL="ALL" means to read all the information);
  • 4. Delete the massage:
  • 5. Convert the displayed information into a text through a code converter

Dial-up Networking with Raspbian

  • When using Raspberry Pi Zero/Zero W, you can connect it to the 4G HAT through the thimble, no additional USB cable is required;
  • if it is used on other Raspberry Pi boards, you can connect the 4G HAT to the Raspberry Pi through a Micro USB cable. The connection is as follows:

Minicom serial debugging

  • 1. Connect the HAT to your Pi through the USB cable.
  • 2. Install minicom
sudo apt-get install minicom
  • 3. Execute the following command
sudo minicom -D /dev/ttyUSB2

The default baud rate is 115200.

  • 4. Take the AT synchronization test as an example, send related commands, as shown in the picture below:

Press Ctrl+A, then press Z, the minicom can enter the setting mode, and press X to exit.

More demo programs continue to be updated...

Jetson Nano Demo

Hardware connection

Connect the SIM7600X 4G HAT(B) to the USB port of Jetson Nano via Micro USB cable, as shown in the picture below:

SIM7600G-H 4G HAT Jetson nano.png

Minicom serial debugging for Jetson Nano

  • Connect the SIM7600X 4G HAT(B) to Jetson Nano through the USB cable.
  • Use SERIAL to log in to Jetson Nano terminal and install minicom:
sudo apt-get install minicom
  • Run minicom for debugging, enter the following command in the terminal:
sudo minicom -D /dev/ttyUSB2 -b 115200
  • Send AT command to test
SIM7600 G-H B Jetson.png

Press Ctrl+A, then press X to exit the minicom.

More demo programs continue to be updated...



If you require technical support, please go to the Support page and open a ticket.