Waveshare ESP32-S3 A7670E 4G & GNSS

The ESP32-S3-A7670E-4G is a high-performance, multi-functional microcontroller development board designed by Waveshare. It features a built-in A7670E 4G Cat-1 / G2 communication module, along with a variety of onboard peripherals including an OV-series camera interface, TF card slot, RGB LED, 18650 battery holder, battery voltage monitoring IC, solar panel charging interface, and more.

Powered by the ESP32-S3R2 chip, the board integrates low-power Wi-Fi and Bluetooth 5.0, along with external 16MB Flash and 2MB PSRAM. It also includes advanced security features such as a hardware encryption accelerator, random number generator, HMAC, and digital signature module, meeting the security demands of IoT applications. The integrated A7670E 4G Cat-1 / G2 module provides reliable mobile network connectivity, making the board ideal for IoT, mobile devices, outdoor monitoring, smart home, and other low-power applications.

Key features

• Adopts ESP32-S3R2 chip with high-performance Xtensa 32-bit LX7 dual-core processor, capable of running at 240MHz
• Built in 512KB SRAM, 384KB ROM, 2MB of PSRAM, and 16MB Flash memory
• Integrated 2.4GHz Wi-Fi and Bluetooth LE dual-mode wireless communication, featuring superior RF performance
• Equipped with the A7670E-FASE cellular module, supports 4G Cat-1 / 2G networking, GNSS positioning, telephone calls, SMS, and other functions
• Onboard USB switching IC and DIP switch for switching to use the USB interface of A7670E, suitable for connecting with PC for dial-up internet or debugging of A7670E module
• Onboard lithium battery charging, solar charging, power management, battery capacity measurement, and related protection circuits, supports USB and solar charging with real-time battery capacity measurement
• Onboard 18650 battery holder (battery not included), adapting VBAT pin header for connecting to external 3.7V lithium battery, with anti-reverse protection
• Rich peripheral interfaces such as camera interface, TF card slot, USB port, 38PIN header, etc., easy to expand and achieve various functions
• Onboard multiple DIP switches for camera on/off, switching USB channels to avoid interface conflict, and setting power on/off for some circuits to reduce power consumption
• Comes with GNSS high-precision ceramic antenna, OV2640 camera, mini speaker, acrylic case, etc., easy to develop various applications
• Comes with online development resources and manual (including tutorials, demos for 4G portable Wi-Fi and other IoT examples)

Hardware layout

1. ESP32-S3R2
2. A7670E-FASE
3. EA3036C DC-DC 3-ch power output
4. ETA6098 battery charging IC
5. CN3791 solar power charging IC
6. MAX17048G battery voltage measurement IC
7. CH343 UART to USB IC
8. CH334 USB HUB
9. W25Q128JVSIQ external 16MB Flash
10. FSUSB42UMX USB switching IC
11. TXB0104PWR voltage translator
12. Camera 24PIN interface compatible with cameras such as OV2640/OV5640
13. TF Card Slot
14. USB Type-C port, onboard CH343 And CH334 supports connecting to UART and USB of the ESP32-S3 & onboard USB switching IC and DIP switch for switching to use the USB interface of A7670E
15. RESET button
16. BOOT button
17. Nano SIM card slot
18. Solar panel input interface for connecting to 5V/6V/9V/12V/18V solar panel
19. Onboard antenna
20. ESP32-S3 WiFi connector (IPEX 1) using onboard ceramic antenna by default, supports connecting to external WiFi antenna by modifying solder pad
21. GNSS connector (IPEX 1)
22. LTE connector (IPEX 1)
23. WS2812B RGB LED
24. Power indicator
25. Battery reverse warning indicator
26. Solar power input indicator
27. Network status indicator
28. Solar power input voltage selection for setting solar panel input voltage: 5V level by default, for connecting with 5.5V/6V solar power panel, supports modifying solder pads for 9V/12V/18V solar panels
29. SY8105IADC external input DC-DC
30. DIP Switch CAM: for turning on/off the camera,  HUB: for controlling the power supply of USB HUB driver circuit, 4G: for controlling the power supply of A7670E module, USB: for switching to the USB channel of A7670E module
31. Battery power supply on/off
32. 18650 battery holder
33. Microphone input
34. Speaker output

Provides portable 4G Wi-Fi solution

ESP32-S3 is connected to the A7670E via USB to enable 4G networking while simultaneously activating Wi-Fi AP hotspot, allowing smartphones or other Wi-Fi terminals to connect and access network.

Supports image recognition

Onboard 24PIN camera interface, comes with OV2640 camera. Compatible with the ESP32-Camera framework, suitable for facial recognition.

Supports charging via solar panel or USB port

Onboard lithium battery charging, solar charging, power management, battery capacity measurement, and related protection circuits, supports USB and solar charging with real-time battery capacity measurement. (Note: The solar panel is not included, it is recommended to purchase solar panel 5.5V-6W or 6V-5W or 18V-10W).

Supports Windows/Linux dail-up Internet

Onboard USB switching IC and DIP switch, for switching to use the USB interface of A7670E, suitable for connecting with PC for dial-up internet or debugging of A7670E module.

Telephone call & SMS support

Making telephone call or sending SMS by AT commands, with onboard microphone and speaker.

Waveshare.cloud support

Provides tutorial and demo for quick start of smart IoT solutions, with large-screen data visualization display to meet various application scenarios.

Smart garden solutions: Can report various sensor data of the garden through MQTT to remotely control device ON/OFF, irrigation, fertilization, and so on.

Server performance cloud monitoring: Can report various performance parameters of the Raspberry Pi server through MQTT, and monitor the operation status in real-time through the cloud platform.

IoT GPS mobile positioning: Can regularly report the data of the GPS positioning module through MQTT to realize mobile detection, animal or device positioning and tracking, etc.