VVM401B - Vajruino 4G IoT Gateway Board with RS485 RS232 Ethernet Digital IO for Industrial Applications

Optional LoRa Module

If using the optional LoRWAN RA-08H module, carefully solder it into the designated PCB Header slot. Use pins 16 and 17 for sending and receiving AT commands from ESP32 to RA-08. This module by Ai-Thinker comes in 2 variants, RA-08 (410MHz - 525MHz) and RA-08H (803MHz - 930MHz license free in India). Adhere to relevant regulations and license free frequency bands specific to your region.

Supply

Ensure that the module is powered using a stable and appropriate power supply within the specified voltage range (9v to 30v). Take necessary precautions to prevent electrostatic discharge (ESD) when handling the module to avoid damage. Follow the pinout and connection guidelines provided in the user manual diagram to prevent incorrect wiring, which may lead to malfunction or damage. Ensure proper grounding to minimize the risk of electrical noise and interference, which can affect the module's performance.

Environment and Handling

Avoid exposing the module to extreme temperatures, humidity, or other adverse environmental conditions that could affect its performance and longevity. Refer to the user manual and documentation provided by the module manufacturer for detailed guidelines, pinout diagrams, and programming instructions (given in our GitHub repository).

Security and Integration

Implement appropriate security measures to protect the module's firmware from unauthorized access or tampering. When integrating the module into a larger system, ensure compatibility and proper communication protocols between the module and other components.

Setup

Connect the 4G Antenna and gently insert a Nano SIM card having valid 4G subscription service in the spring type SIM Card holder. Insert a micro SD Card (16GB max) in the SD card holder. SD Card is optional and required only if Data Logging or Data Storage is required. On devices having LAN Module, connect an Ethernet cable from this board to the Ethernet. Create a Mobile / Wireless Router Hotspot with the following credentials: SSID: iotgateway Password: iot@1234 Connect a good quality regulated SMPS (9v to 30v range, 2A) to the Power Input Connector of the board, ensuring proper polarity. Set the communication for either RS485 or RS232 using the jumper selector. Default code is already present in ESP32. Refer our github page http://www.github.com/vajravegha/vajruino This default code (LTE_WiFi_Eth_MQTT.ino) is OTA enabled.

Applications

Industrial Automation: The VAJRUINO module's support for Ethernet, Modbus, RS485, and RS232 protocols makes it suitable for industrial automation applications, including data acquisition, control systems, and monitoring.

Internet of Things (IoT): With built-in Wi-Fi, cellular connectivity, and support for various protocols, the module can be used in IoT projects for remote monitoring, data transmission, and control.

Data Logging and Time-keeping: The Micro SD card slot allows for data logging, making the module ideal for applications that require storage and analysis of large amounts of data. The accurate RTC ensures precise timekeeping for scheduling and synchronization in applications such as event triggering, data logging, and automation. The module also features a 32KB EEPROM for non-volatile storage of critical data, providing reliability and persistence across power cycles.

Protocol Support: Various protocols such as MQTT(s), HTTP(s), DHCP, FTP, Modbus, SPI, and I2C are supported, enabling easy integration with different systems.