ESP32-S3 A7670E 4G LTE Cat-1 GNSS WiFi Bluetooth Development Board

Resources:

WIKI: www.waveshare.com/wiki/ESP32-S3-A7670E-4G

ESP32-S3 A7670E 4G Development Board, LTE Cat-1 / 2G / WiFi / Bluetooth / Telephone Call / SMS / GNSS Positioning Support, Suitable for 4G Portable WiFi, Onboard Camera / Speaker / Antenna

The ESP32-S3 A7670E 4G LTE Cat-1 / 2G / WiFi / Bluetooth Development Board by Waveshare is a multi-functional IoT development platform integrating powerful wireless communication, edge computing, and power management features. Built around the ESP32-S3R2 chip and A7670E Cat-1 cellular module, this board provides a complete solution for IoT, industrial control, remote monitoring, and smart device applications. Powered by the Xtensa 32-bit LX7 dual-core processor running up to 240 MHz, it offers high-performance computing with built-in Wi-Fi and Bluetooth 5.0 (LE) for local connectivity. It includes 16MB Flash, 2MB PSRAM, 512KB SRAM, and 384KB ROM, enabling complex applications with fast data handling and large storage capacity. The onboard A7670E Cat-1 4G module supports 4G LTE, 2G fallback, GNSS positioning, SMS, and voice functions, providing versatile cellular connectivity for IoT devices deployed in mobile or remote environments.

The board supports 18650 lithium battery operation (battery not included) with integrated charging management, solar panel input, and battery voltage monitoring for off-grid IoT use. It also features an OV camera interface, TF card slot, RGB LED, and USB switching circuit, allowing developers to design and test advanced embedded systems such as remote surveillance, smart agriculture, asset tracking, and portable Wi-Fi hubs. With support for GNSS antenna, camera modules (OV2640/OV5640), and extensive DIP switch configuration options, this board ensures flexible expansion and easy prototyping. Waveshare provides comprehensive development resources and tutorials to simplify integration and accelerate project deployment.

Key Features

• Powerful ESP32-S3R2 Core:
  Dual-core Xtensa 32-bit LX7 processor running at 240 MHz, with 16MB Flash and 2MB PSRAM.
• Multi-Mode Connectivity:
  Integrated 2.4GHz Wi-Fi and Bluetooth 5.0 (LE) for wireless local communication.
• 4G LTE Cellular Module:
  Equipped with A7670E Cat-1/2G module supporting GNSS positioning, SMS, and voice functionality.
• Comprehensive Power Management:
  Supports USB and solar charging, with battery monitoring and overcharge protection circuits.
• Battery & Solar Power Options:
  Includes 18650 battery holder and VBAT pin header for external lithium battery connections.
• Rich Peripheral Interfaces:
  Camera interface, TF card slot, RGB LED, 38-pin expansion header, and USB port for flexible development.
• Modular Communication Switching:
  DIP switches for toggling USB channels, power circuits, and camera activation to reduce power consumption.
• Enhanced GNSS Performance:
  Comes with a high-precision ceramic antenna for stable positioning and signal reception.
• Included Accessories:
  OV2640/OV5640 camera, GNSS antenna, mini speaker, and protective acrylic case for immediate project setup.
• Extensive Development Resources:
  Provides online documentation, code examples, and tutorials for IoT applications and 4G portable Wi-Fi projects.

ESP32-S3 A7670E 4G Development Board

Multiple low-power operating modes are suitable for applications such as outdoor monitoring, 4G portable WiFi, smart home, and so on.

Provides Portable 4G WiFi Solution

The ESP32-S3 is linked to the A7670E via USB to enable 4G networking while concurrently enabling the WiFi AP hotspot, which allows smartphones or other WiFi terminals to connect and access the network.

Telephone Call & SMS Support

Supports Image Recognition

What's On Board

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

Pinout Definition

Dimensions

Package Content:

1. ESP32-S3-A7670E-4Gx1
2. Transparent acrylic case and screws packx1
3. GNSS ceramic antennax1
4. OV2640 / OV5640 camerax1
5. 8Ω 2W 2030 speakerx1
6. 40PIN yellow straight pin headerx1
7. USB Type-A to Type-C cable 1mx1
8. FPC antennax1
9. Screwdriverx1
10. 2P screw terminalx1
11. Double-side tape (4PCS)x1