Waveshare ESP32-S3-A7670E-4G is a versatile and high-performance microcontroller development board designed for advanced IoT applications. It features a built-in A7670E 4G communication module, an OV-series camera interface, TF card slot, RGB LED, 18650 battery holder (battery not included), battery voltage monitoring IC, solar charging interface, and a wide range of peripheral interfaces. At its core, the board integrates the ESP32-S3R2 chip, which includes low-power 2.4GHz WiFi and Bluetooth 5.0 LE, along with 16MB external Flash and 2MB PSRAM. It also supports hardware encryption, a random number generator, HMAC, and digital signature modules, ensuring robust IoT-grade security. To enable mobile connectivity, the board is equipped with the A7670E Cat-1 4G module, supporting LTE and 2G networks, GNSS positioning (GPS, BeiDou, GLONASS), voice calls, and SMS. A USB switching IC and DIP switches allow seamless toggling between the ESP32 and A7670E USB interfaces, making it easy to connect to a PC for dial-up networking or module debugging. The board supports USB and solar charging, with real-time battery capacity monitoring and protection circuitry. The 18650 battery holder (battery not included) also supports external 3.7V lithium batteries via the VBAT pin header, with reverse polarity protection. It offers rich expansion options, including a 38PIN header, camera interface, TF card slot, and USB port. Multiple DIP switches allow you to control camera power, switch USB channels, and selectively power down circuits to reduce energy consumption. The kit includes a high-precision GNSS ceramic antenna, OV2640/OV5640 camera, mini speaker, and acrylic case, making it ideal for rapid development of smart home systems, outdoor monitoring, or portable 4G WiFi solutions. Waveshare provides comprehensive online resources, including tutorials and demo projects for 4G networking and IoT applications, helping developers get started quickly and efficiently. Specifications Communication Parameters Frequency Band LTE-FDD: B1, B3, B5, B7, B8, B20 Data Transmission ≤5Mbps(UL)≤10Mbps(DL) GNSS GPS, BeiDou, GLONASS Operating Parameters Power supply method USB port, 18650 lithium battery holder (18650 battery is NOT included), pin header Power input 5V (USB port / 5V pin header)3.7~4.2V (18650 lithium battery holder / VBAT pin header) Logic Level 3.3V Multi Band support of LTE Cat-1/2G Multi Band and Multi regions Support, mainly applicable in Europe, Southeast Asia, West Asia, Africa, China, South Korea * Please confirm the supported bands according to your local service provider Provides portable 4G WiFi solution ESP32-S3 is connected to the A7670E via USB to enable 4G networking while simultaneously activating WiFi AP hotspot, allowing smartphones or other WiFi terminals to connect and access network 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 Supports image recognition Onboard 24PIN camera interface, comes with OV2640 / OV5640 cameraCompatible with the ESP32-Camera framework, Suitable for facial recognition Supports charging via solar panelor 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 The solar panel is NOT included, it is recommended to purchase Solar Panel (5.5V 6W), Solar Panel (6V 5W), and Solar Panel (18V 10W). GNSS positioning Supports GPS, BeiDou, GLONASS positioning Application Example provides multiple networking demos with Waveshare.cloud, using the lightweight MQTT protocol to achieve data visualization service 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:The ESP32-S3-A7670E-4G 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:The ESP32-S3-A7670E-4G 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:The ESP32-S3-A7670E-4G can regularly report the data of the GPS positioning module through MQTT to realize mobile detection, animal or device positioning and tracking, etc. Application Scenarios What's On Board ESP32-S3R2 A7670E-FASE EA3036CDC-DC 3-ch power output ETA6098Battery charging IC CN3791Solar power charging IC MAX17048GBattery voltage measurement IC CH343UART to USB IC CH334USB HUB W25Q128JVSIQExternal 16MB Flash FSUSB42UMXUSB switching IC TXB0104PWRVoltage translator Camera 24PIN interfaceCompatible with cameras such as OV2640 / OV5640 TF Card Slot USB Type-C portOnboard CH343 And CH334, supports connecting to UART and USB of the ESP32-S3Onboard USB switching IC and DIP switch for switching to use the USB interface of A7670E RESET button BOOT button Nano SIM card slo Solar panel input interfacefor connecting to 5V/6V/9V/12V/18V solar panel Onboard antenna ESP32-S3 WiFi connector (IPEX 1)using onboard ceramic antenna by default, supports connecting to external WiFi antenna by modifying solder pad GNSS connector (IPEX 1) LTE connector (IPEX 1) WS2812BRGB LED Power indicator Battery reverse warning indicator Solar power input indicator Network status indicator Solar power input voltage selectionfor 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 SY8105IADCExternal input DC-DC DIP SwitchCAM: for turning on/off the cameraHUB: for controlling the power supply of USB HUB driver circuit4G: for controlling the power supply of A7670E moduleUSB: for switching to the USB channel of A7670E module. Battery power supply on/off 18650 battery holder Microphone input Speaker output Pinout Definition Outline Dimensions
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