---
title: "Vajravolt AI IoT 4G LTE Industrial Gateway Board (VVM701)"
url: "https://maker.wiznet.io/TheoIm/resellers/vajravolt-ai-iot-4g-lte-industrial-gateway-board-vvm701/"
markdown_url: "https://maker.wiznet.io/TheoIm/resellers/vajravolt-ai-iot-4g-lte-industrial-gateway-board-vvm701/md"
type: "VAR: Value-Added Reseller Products"
author: "vajravolt"
author_url: "https://github.com/vajravegha/vajravolt"
editor: "WIZnet"
editor_url: "https://maker.wiznet.io/"
original_author: "vajravolt"
original_url: "https://github.com/vajravegha/vajravolt"
published: "2025-11-18"
language: "en"
hardware: ["WIZnet W5500"]
likes: 0
views: 530
comments: 0
source: "WIZnet Makers (https://maker.wiznet.io/)"
---

# Vajravolt AI IoT 4G LTE Industrial Gateway Board (VVM701)

> AI-enabled industrial IoT gateway with ESP32-S3, 4G LTE, GPS, isolated RS485/RS232, analog/digital inputs, relays, SD/SIM support, and optional Ethernet, LCD, c

Original author: vajravolt (source: https://github.com/vajravegha/vajravolt)

## Components

- **WIZnet W5500** x 1 ([docs](https://docs.wiznet.io/Product/Chip/Ethernet/W5500))

WIZnet parts: W5500 ([Datasheet](https://docs.wiznet.io/Product/Chip/Ethernet/W5500/datasheet?utm_source=maker&utm_medium=project&utm_campaign=w5500), [product hub](https://maker.wiznet.io/products/w5500/))

## Article

**All-in-one industrial IoT platform**: Vajravegha Mobility's VVM701 integrates ESP32-S3, 4G LTE, GNSS, industrial I/O, and optional W5500 Ethernet—designed for automation, data acquisition, and edge AI applications.

---

## 📦 Product Information

![](https://maker.wiznet.io/upload/ckeditor5/638754182%5F1764578683%2Epng)

![](https://maker.wiznet.io/upload/ckeditor5/638754182%5F1764578905%2Epng)

| Item | Details |
| --- | --- |
| **Model** | VVM701 v1.1 |
| **Manufacturer** | Vajravegha Mobility Pvt Ltd (Mumbai, India) |
| **PCB Size** | 130 × 105 mm |
| **Power** | 9–30V DC |

---

## 🔧 Core Features

### Main Components

| Component | Specification |
| --- | --- |
| **MCU** | ESP32-S3 WROOM-1 (240MHz, 16MB Flash, 8MB PSRAM) |
| **Cellular** | Quectel EC200U-CN 4G LTE Cat 1 (10Mbps) |
| **GNSS** | Built-in GPS positioning |
| **Wireless** | Wi-Fi + Bluetooth 5 |
| **RTC** | DS3231 (I2C) |

### Industrial I/O

| Feature | Specification |
| --- | --- |
| **Analog Inputs** | 5 ch, 12-bit (4–20mA / 0–5V) |
| **Digital Inputs** | 4 ch isolated (up to 24V) |
| **Relay Outputs** | 2 ch (30V DC / 2A) |
| **Serial** | Isolated RS485/RS232 (jumper selectable) |
| **Storage** | Micro SD card + Nano SIM slot |
| **USB** | Type-B (programming/monitoring) |

### Protocols

MQTT(s), HTTP(s), DHCP, FTP, Modbus RTU/TCP, SPI, I2C, FOTA

---

## 🔌 Optional Expansions (Not Mounted)

| Module | Purpose | Interface |
| --- | --- | --- |
| **W5500 Ethernet** | Wired network / Modbus TCP | SPI (CS: GPIO21) |
| **2.4" TFT LCD** | 240×320 touchscreen HMI | SPI |
| **Camera** | OV2640/OV7670 for AI vision | SCCB |
| **INMP441 Mic** | I2S audio/voice activation | I2S |
| **RFM95W LoRa** | Long-range wireless | SPI |
| **I2C Sensors** | MPU6050, EEPROM, etc. | I2C |
| **CAN** | TJA1050/TJA1051 transceiver | UART1 |

---

## 📊 Key GPIO Mapping

| Peripheral | Pins | Notes |
| --- | --- | --- |
| **4G Module** | TX:41, RX:40, PWRKEY:42 |  |
| **Standard SPI** | MOSI:11, MISO:13, CLK:12 | Shared: W5500/LCD/LoRa |
| **SD Card** | MISO:38, MOSI:47, CLK:39, CS:48 | HSPI |
| **RS485/RS232/CAN** | TX:1, RX:2 | Jumper selectable |
| **I2C (RTC/Sensors)** | SCL:4, SDA:5 |  |
| **W5500** | CS:21 | + standard SPI |
| **Status LED** | GPIO:18 |  |

**Caution**: Strapping pins (0, 3, 45, 46) and PSRAM pins (35, 36, 37)—use carefully.

---

## 🚀 Quick Setup

1. **Connect**: 4G antenna, SIM card, optional SD card

2. **Power**: 9–30V DC supply

3. **Wi-Fi**: Create hotspot `iotgateway` / password `iot@1234`

4. **Access**: Browse to `iotgateway.local`

5. **Program**: USB connection, Arduino IDE (ESP32S3 Dev, enable "USB CDC on Boot")

**LED Status**:

- Slow flicker: Searching network

- Quick flicker: Connected (idle)

- Rapid flicker: Data transfer

---

## 🎯 Why W5500 Matters

### Industrial Connectivity

**W5500 adds**:

- Hardware TCP/IP (zero MCU overhead)

- Wired Ethernet reliability

- Modbus TCP/IP gateway capability

**Multi-Path Architecture**:

```plaintext
4G LTE ──┐
Wi-Fi   ──┼──> VVM701 ──> Industrial Systems
Ethernet──┘   (W5500)
```

### Key Applications

- **Modbus Gateway**: RS485 RTU ↔ Ethernet TCP

- **Factory Automation**: PLC monitoring + cloud streaming

- **Edge AI**: Camera vision + network results delivery

- **Remote Monitoring**: Multi-sensor data logging

---

## 📚 Resources

- **GitHub**: [github.com/vajravegha/vajravolt](http://www.github.com/vajravegha/vajravolt)

- **Support**: info@vv-mobility.com / +91 88506 27350

- **Website**: [vv-mobility.com](http://www.vv-mobility.com)

---

## ⚠️ Important Notes

- **Programming**: Understand EC200U AT commands before reprogramming

- **No voice calls**: Board lacks speaker/microphone

- **Arduino IDE**: Always enable "USB CDC on Boot"

- **I2C conflict**: MPU6050 (0x68) conflicts with RTC—change to 0x69

- **Serial select**: Only one of RS485/RS232/CAN active at a time

---

## Conclusion

**VVM701** consolidates ESP32-S3, 4G LTE, industrial I/O, and optional **W5500 Ethernet** into a single board—ideal for:

✅ Industrial automation and Modbus gateways
✅ Edge AI with camera/microphone
✅ Multi-connectivity (cellular/Wi-Fi/Ethernet)
✅ Data acquisition and remote monitoring

**W5500 integration** provides hardware TCP/IP offloading and wired reliability—transforming VVM701 into a professional-grade industrial IoT platform. Made in India by Vajravegha Mobility.

---

Source: https://maker.wiznet.io/TheoIm/resellers/vajravolt-ai-iot-4g-lte-industrial-gateway-board-vvm701/