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ESP32-S3-SIM7670G-4G development board, 4G Cat-1 connectivity, WiFi, Bluetooth, GPS, OV camera, solar charging
The all-in-one IoT platform for autonomous and mobile projects combines 4G Cat-1 with WiFi and Bluetooth for fast cloud connectivity, includes multi-system GNSS for precise tracking, supports OV camera for capture and streaming, has flexible power supply via USB, 18650 battery or solar panel with integrated charging.
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The Waveshare ESP32-S3-SIM7670G-4G development board is a complete multifunctional development module, designed for IoT projects and smart applications that require 4G, WiFi, Bluetooth and GNSS connectivity in a single platform.
Based on the ESP32-S3R2 microcontroller, equipped with a dual-core Xtensa LX7 processor at 240 MHz, the module integrates a SIM7670G Cat-1 that ensures stable 4G communication, with support for satellite positioning (GPS, BeiDou, GLONASS, Galileo).
The board features a variety of interfaces — USB Type-C port, microSD (TF) slot, 24-pin camera interface (compatible with OV2640 and OV5640), nano-SIM slot, as well as 18650 battery support. It includes dedicated circuits for solar power, battery charging, voltage measurement, reverse protection, and automatic switching between power sources.
Through the DIP Switch (pos. 30), the user can independently control the power supply of the camera, SIM7670G module, USB channel and HUB circuit power. Integrated LED indicators provide clear information about power, solar charging, network and battery status.
The module can function both as a portable WiFi hotspot with 4G access, and as a complete IoT platform, capable of sending data via MQTT to cloud platforms (e.g. Waveshare.cloud ).
Thanks to the high-performance integrated circuits (EA3036C, ETA6098, MAX17048G, SY81051ADC, CH343, CH334, TXB0104PWR), the board ensures efficient energy management and long-term stable operation, making it ideal for mobile, autonomous or remote monitoring applications.
Specifications:
Power supply: USB 5 V, 18650 battery (3.7 – 4.2 V), Solar panel (5 / 6 / 9 / 12 / 18 V – selectable via jumper)
Logic level: 3.3 V
Microcontroller: ESP32-S3R2, dual-core Xtensa LX7, 240 MHz
Memory: 512 KB SRAM, 384 KB ROM, 2 MB PSRAM, 16 MB External Flash
Communication module: SIM7670G – LTE Cat-1, with GNSS support
LTE bands:
FDD: B1/B2/B3/B4/B5/B7/B8/B12/B13/B18/B19/B20/B25/B26/B28/B66
TDD: B34/B38/B39/B40/B41
Transfer rate: 10 Mbps (DL) / 5 Mbps (UL)
GNSS: GPS / BeiDou / GLONASS / Galileo
Additional connectivity: WiFi 2.4 GHz (802.11 b/g/n) + Bluetooth LE 5.0
Available interfaces:
24PIN Camera (OV2640)
microSD (TF Card) slot
USB Type-C port (power / programming / communication)
Nano SIM slot
38-pin GPIO header (UART, SPI, I2C, PWM, ADC, etc.)
IPEX connectors for LTE, GNSS and external WiFi
Antenna: onboard ceramic WiFi, external LTE and GNSS antennas (IPEX)
Software compatibility: Windows XP/7/8/10, Linux, Arduino IDE, ESP-IDF
Supported network protocols: TCP / HTTP(S) / MQTT / SFTP(S) / RNDIS / PPP / ECM
Dimensions: 30.44 × 110 mm
Main circuits:
EA3036C – 3-channel DC-DC
ETA6098 – battery charging
CN3791 – solar charging
MAX17048G – battery voltage measurement
CH343 – UART-USB
CH334 – USB HUB
FSUSB42UMX – USB switch
TXB0104PWR – logic level translator
SY81051ADC – external DC-DC converter
LED indicators:
Power
Battery reversal
Solar charging
Network status
RGB WS2812B (programmable)
Switches / Buttons:
DIP Switch (camera control, 4G, USB, HUB)
RESET button
BOOT button
Battery power switch ON/OFF
Specifications Table:
| Category | Technical details |
|---|---|
| Exemplary | Waveshare ESP32-S3-SIM7670G-4G |
| Main processor | ESP32-S3R2, dual-core Xtensa LX7, 240 MHz |
| Memory | 512 KB SRAM, 384 KB ROM, 2 MB PSRAM, 16 MB External Flash |
| Communication mode | SIM7670G – LTE Cat-1 with GNSS support |
| Supported LTE bands | LTE-FDD: B1/B2/B3/B4/B5/B7/B8/B12/B13/B18/B19/B20/B25/B26/B28/B66 LTE-TDD: B34/B38/B39/B40/B41 |
| LTE Cat-1 transfer rate | Downlink 10 Mbps / Uplink 5 Mbps |
| GNSS | GPS / BeiDou / GLONASS / Galileo |
| Additional connectivity | WiFi 2.4 GHz (802.11 b/g/n) + Bluetooth 5.0 LE |
| Supported network protocols | TCP / HTTP(S) / MQTT / SFTP(S) |
| Dial-up protocols | RNDIS / PPP / ECM |
| Software compatibility | Windows XP/7/8/10, Linux (free driver for Raspberry Pi OS) |
| USB connectivity | Supports AT command testing, GNSS positioning, firmware update, programming |
| GPIO UART | Reserved pins for external control (3.3 V logic level) |
| Integrated interfaces | 24PIN camera (OV2640 / OV5640), TF card slot, USB-C port, 38-pin header |
| feeding | 5 V USB / 18650 battery (3.7–4.2 V) / solar panel (5–18 V, selectable) |
| Main integrated circuits | EA3036C (DC-DC 3 channels), ETA6098 (battery charging), MAX17048G (voltage measurement), CH343 (UART-USB), CH334 (USB HUB), FSUSB42UMX (USB switch) |
| LED indicators | Power, Battery reverse, Solar charging, Network status, RGB WS2812B |
| Antenna connector | IPEX 1 (for LTE / GNSS / WiFi, ceramic WiFi antenna included) |
| size | 30.44 × 110 mm |
| Logical level | 3.3V |
| Recommended applications | Portable IoT, 4G WiFi hotspot, facial recognition, GPS positioning, smart garden, server monitoring, industrial telemetry |
| Areas of use | Global – Europe, Asia, Africa, South America |
| Framework compatibility | Arduino IDE, ESP-IDF, MQTT ( Waveshare.cloud ) |
Interface:
| No. | compound | Description / Function |
|---|---|---|
| 1 | ESP32-S3R2 | Main microcontroller, dual-core Xtensa LX7, 240 MHz |
| 2 | SIM7670G | 4G Cat-1 module with GNSS support (GPS, BeiDou, GLONASS, Galileo) |
| 3 | EA3036C | DC-DC converter with 3 output channels |
| 4 | ETA6098 | Li-ion battery charging circuit |
| 5 | CN3791 | Solar panel charging circuit |
| 6 | MAX17048G | Battery voltage measurement circuit |
| 7 | CH343 | UART–USB converter |
| 8 | CH334 | Integrated USB HUB |
| 9 | W25Q128JVSQ | 16 MB external Flash memory |
| 10 | FSUSB42UMX | USB switching circuit |
| 11 | TXB0104PWR | Logic level translator |
| 12 | 24-pin camera interface | Compatible with OV2640 / OV5640 modules |
| 13 | TF card slot | microSD slot for external storage |
| 14 | USB Type-C port | Power, programming and communication (ESP32-S3 / SIM7670G) |
| 15 | RESET button | Reset board |
| 16 | BOOT button | Button for entering programming mode |
| 17 | Nano SIM slot | Nano-SIM card slot (4G network) |
| 18 | Solar panel input interface | Connection to 5V/6V/9V/12V/18V solar panels |
| 19 | Onboard WiFi antenna | Integrated WiFi ceramic antenna |
| 20 | WiFi connector ESP32-S3 (IPEX 1) | Supports external WiFi antenna (by modifying pad) |
| 21 | GNSS connector (IPEX 1) | For connecting the external GNSS antenna |
| 22 | LTE connector (IPEX 1) | For connecting the external LTE antenna |
| 23 | WS2812B RGB LED | Programmable multicolor RGB LED |
| 24 | Power indicator | Power status indicator LED |
| 25 | Battery reversal indicator | Wrong battery polarity warning |
| 26 | Solar charging indicator | LED for solar circuit activity |
| 27 | Network indicator | 4G connection status LED |
| 28 | Solar panel input voltage selector | Voltage selection: 5V / 6V / 9V / 12V / 18V |
| 29 | SY81051ADC | DC-DC converter for external input |
| 30 | DIP Switch | Function switch: CAM (camera), HUB (USB HUB power), 4G (SIM7670G module power), USB (USB channel) |
| 31 | Battery power switch | Battery Power On/Off |
| 32 | 18650 battery holder | Integrated holder for a 18650 Li-ion battery |
Pinout:
Dimensions:
Use:
Connect the board to your computer via the USB Type-C port for power and programming.
Mounts the nano-SIM card, LTE and GNSS antennas and, optionally, the OV2640 camera (also compatible with OV5640).
Configure the DIP Switches (pos. 30) to activate the camera, power the 4G module or select the USB channel.
Power the board via USB, via an 18650 battery (slot 32) or via a solar panel connected to the interface (pos. 18).
Insert the microSD card to store data or images.
Program the ESP32-S3 in Arduino IDE or ESP-IDF, using the examples provided by Waveshare (4G hotspot, MQTT, GPS tracking).
Monitor system status through network, charging and battery voltage LEDs.
Integrate the module into IoT projects, using simultaneous 4G + WiFi connections for cloud reporting or remote control.
Recommended applications:
4G Portable WiFi Hotspot
Sensor monitoring (smart garden, environment, energy)
Facial recognition and image transmission (with OV camera)
Mobile GPS systems (animal, vehicle, equipment tracking)
Server/device performance monitoring via MQTT
Smart home automation and industrial telemetry
Documentation:
Content:
1 x Waveshare ESP32-S3-SIM7670G-4G Module
1 x Transparent acrylic case with complete set of screws
1 x High-precision GNSS ceramic antenna
1 x OV2640 / OV5640 camera compatible with 24PIN interface
1 x 2-pin screw connector (2P terminal block)
1 x 40-pin straight header (yellow color) for GPIO extensions
1 x USB Type-A to Type-C cable, length 1 m
1 x FPC antenna for additional connection
1 x Screwdriver for assembly
1 x Set of double-sided adhesive tapes (4 pieces) for easy fixing of components
Produs destinat utilizarii in proiecte electronice, automatizari, prototipare, educatie si cercetare.
Produsul trebuie utilizat numai conform specificatiilor tehnice mentionate in descriere si/sau in documentatia produsului.
Avertismente generale de siguranta:
Nu utilizati produsul la tensiuni, curenti sau temperaturi peste valorile specificate.
Montajul si conectarea trebuie realizate de persoane cu cunostinte tehnice minime in domeniul electric/electronic.
Evitati scurtcircuitele, inversarea polaritatii si conectarea gresita a alimentarii.
Nu lasati produsul alimentat nesupravegheat in timpul testelor.
Produsul nu este jucarie si nu este destinat copiilor.
Pentru modulele electronice, se recomanda utilizarea in carcase, panouri sau montaje protejate, dupa caz.
Identificare produs:
Denumirea produsului, codul/SKU-ul si caracteristicile tehnice sunt mentionate in pagina produsului si/sau pe eticheta ambalajului.
Producator / Importator / Distribuitor:
Sigmanortec S.R.L.
Calea Bucuresti nr. 9, Targu Jiu, Gorj, Romania
E-mail: [email protected]
Website: www.sigmanortec.ro
Persoana responsabila in UE:
Sigmanortec S.R.L.
Calea Bucuresti nr. 9, Targu Jiu, Gorj, Romania
E-mail: [email protected]
Documentatie si siguranta:
Pentru informatii suplimentare, fise tehnice, declaratii de conformitate sau instructiuni, ne puteti contacta la [email protected].
