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)

Connection Steps

• With the power off

  • Insert an activated 4G SIM card
  • 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

Device Recognition

The SIM7670G typically does not require additional driver installation on mainstream Windows systems. After connecting the device via USB, you can see several new COM ports in Device Manager, as shown in the figure below:

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