Working with Windows

Hardware Connection

Before using the module, in addition to the Type-C USB cable, GNSS antenna, and LTE antenna, you will also need the following items:

• One 4G SIM card (active account with 4G/GPRS data service enabled)
• One headset cable with a microphone (optional)

Connection Steps

• With the power off

  • Insert an activated 4G SIM card
  • Connect the headset cable with a microphone (optional)
  • Connect the USB cable to your computer

• Use the Type-C USB cable

  • Connect one end to a USB port on your PC
  • Connect the other end to the USB port of the ESP32-S3-A7670E-4G

• LED status after power-up

  • The PWR LED lights up
  • Wait approximately 3 to 5 seconds for the module to start
  • The NET LED stays on: Module startup is complete
  • The module automatically searches for the network; subsequently, the NET LED starts blinking

Driver Installation

The first time you use the module on Windows, you need to install the driver:

Driver Download

A7600X Windows Driver

Installation Steps

1. Open Device Manager
   
2. Locate "Mobile AT Interface", then click "Update driver" on the right
   
3. Click "Browse" and select the folder containing the downloaded driver
   
   
4. After successful installation, Device Manager will show something like "SimTech HS-USB AT Port 9011”
   

Device Recognition

After the driver is installed, several new COM ports will appear in Device Manager.

Common AT Command Functions for Cat-1 Module

HTTP

AT Command	Description	Response
AT+HTTPINIT	Initialize HTTP service	OK
AT+HTTPPARA="URL",https://www.waveshare.cloud/api/sample-test/	Connect to remote server	OK
AT+HTTPDATA=5,1000	Input data	DOWNLOAD Type hello OK
AT+HTTPACTION=0	Start HTTP request 0:GET; 1:POST; 2:HEAD; 3:DELETE; 4:PUT	OK +HTTPACTION: 0,200,54
AT+HTTPTERM	Terminate HTTP service	OK
AT+HTTPPARA	Set HTTP parameters	OK
AT+HTTPHEAD	Read HTTP response header	OK
AT+HTTPREAD	Read HTTP response data	OK

MQTT

AT Command	Description	Response
AT+CMQTTSTART	Start MQTT service	OK
AT+CMQTTACCQ=0,"Waveshare-7670X",0	Request an MQTT client	OK
AT+CMQTTCONNECT=0,"tcp://mqtt.easyiothings.com",20,1	Send MQTT connection request, connect to private MQTT server (MQTTS)	OK
AT+CMQTTTOPIC=0,8	Set the topic for publishing	>A7670Pub OK
AT+CMQTTPAYLOAD=0,9	Set the payload for publishing	OK >waveshare
AT+CMQTTPUB=0,0,60	Publish message	OK +CMQTTPUB: 0,0
AT+CMQTTSUB=0,8,1	Subscribe to a topic	>A7670Sub OK +CMQTTSUBTOPIC: 0,0 [10:03:39.665] Received←◆ +CMQTTRXSTART: 0,8,15 +CMQTTRXTOPIC: 0,8 A7670Sub +CMQTTRXPAYLOAD: 0,15 {"data":"test"} +CMQTTRXEND: 0
AT+CMQTTSTOP	Stop MQTT service	OK
AT+CMQTTREL	Release MQTT client	OK
AT+CMQTTUNSUBTOPIC	Release subscribed topic	OK
AT+CMQTTUNSUB	Unsubscribe	OK

GNSS

AT Command	Description	Response
AT+CGNSSPWR=1	Power on GNSS	+CGNSSPWR: READY!
AT+CGNSSTST=1	Enable GNSS data output	OK
AT+CGNSSPORTSWITCH=1,0	Switch NMEA data to USB NMEA output	OK
AT+CGNSSPORTSWITCH=0,1	Switch NMEA data to UART output	OK
AT+CGPSINFO	Get current GNSS data	Position information

Voice Call

• Connect a configured speaker or headset to the development board

  AT Command	Description	Response
  ATD10086;	Make a call	OK VOICE CALL: BEGIN
  ATA	Answer a call	OK VOICE CALL: BEGIN
  ATH	Hang up a call	OK VOICE CALL: END: 000017

SMS (Send and Receive)

Sending an English SMS

• Set the local SMS center number:
  Execute AT+CSCA="+8613800755500" and press Enter. A response of OK indicates success.
  Note: The format for China Mobile SMS center numbers is +861380xxxx500, where xxxx is the area code of your location. The center number may vary by region; you can find it online or check with your carrier. This example uses the Shenzhen area code (0755).
• Set SMS mode to text mode:
  Execute AT+CMGF=1 to set the message format to TEXT mode. The response is OK.
• Send an SMS:
  Execute AT+CMGS="phone number" and press Enter to set the recipient's phone number. After the module returns the > prompt, enter the message content (e.g., Send message test!).
  Do not press Enter after the message content. When finished editing, send the hexadecimal value 1A (which is CTRL+Z) to execute the send operation. You can also send 1B (ESC) to cancel.
  Upon successful sending, the module returns +CMGS: 15, indicating the SMS was sent successfully. As shown in the figure below:

  

Receiving an English SMS

• Send an SMS from your phone to the module, for example: Hello,0909
• When the module receives an SMS, the serial port will automatically report a notification containing "SM", where "20” indicates that there are currently 20 SMS messages stored in the SIM card, and the sequence number of the latest received SMS is 20
• Read the SMS content:
  Execute AT+CMGR=20 to read the 20th SMS (AT+CMGL="ALL" reads all SMS messages from the SIM card)
• Delete an SMS:
  Execute AT+CMGD=20
• Convert the returned SMS content into readable text using an encoding conversion tool

  

Sending a Chinese SMS

• Set SMS sending parameters

  AT+CMGF=1                                 //Set as text mode
  AT+CSCS="UCS2”                      // Set the character set to UCS2
  AT+CSMP=17,167,2,25              // Set text mode parameters
  AT+CMGS="00310037003200360030003700360034003700390035"  // Set the recipient's phone number in UCS2 encoding

• Wait for the module to return the ">" prompt, then send the message content that has been converted by software (e.g., 6700597D7684795D798FFF0). Do not press Enter after the message content. When finished editing, send the hexadecimal value 1A (CTRL+Z) to execute the send operation. As shown in the figure below:

  

Receiving a Chinese SMS

• Set SMS reception parameters

  AT+CMGF=1                                  // Set to text mode
  AT+CSCS="GSM”                         // Set the character set to GSM
  AT+CNMI=2,1                                 // Configure new SMS indication

• When a new SMS is received, the serial port will automatically report a notification. Read the SMS content based on the notification, for example:

  AT+CMGR=21                                // Read the SMS with sequence number 21

• Convert the returned SMS content into Chinese text using terminal software. As shown in the figure below:

  

TTS (Text To Speech)

• Common AT commands for TTS are as follows:

  AT+CTTSPARAM=?                     // View the range of adjustable parameters
  AT+CTTSPARAM=1,3,0,1,1        // Set parameters
  AT+CTTSPARAM?                        // Read current TTS parameters
  AT+CTTS=1,"6B228FCE4F7F75288BED97F3540862107CFB7EDF"   // Synthesize and play UCS2 text
  AT+CTTS=2,"1234567890"         // Synthesize and play plain text

  

LBS (Base Station Positioning)

• Common commands for LBS base station positioning are as follows:

  AT+CLBS=?                                   // View the range of configurable parameters
  AT+SIMEI=xxxxx                             //If there is no IMEI, set the IMEI first. xxxxx must match the IMEI code on the module's sticker
  AT+CLBS=2                                   //Get the detailed address
  AT+CLBS=1                                   //Get the current latitude and longitude