Seeed Studio Studio reComputer R1225 LoRaWAN Gateway & Industrial Controller (EU868), CM4-Powered

The gateway ships pre-installed with SenseCAP Gateway OS, a customized Linux distribution for LoRaWAN. On first boot, connect via Ethernet to the Gigabit port (which supports PoE) or via Wi-Fi. Use a web browser to navigate to the device's IP address, which you can find via your router's DHCP client list, to access the web-based configuration dashboard for setting up the LoRaWAN network server connection, Wi-Fi credentials, and system settings.

Each of the three RS485 ports is optically isolated and terminated with a 120Ω resistor (included). Connect your Modbus RTU slave devices (e.g., sensors, meters) to the terminal block connectors. Within the gateway's OS, you will use software like Node-RED, a Python script with pymodbus, or a dedicated container to read/write Modbus registers. Ensure you configure the correct serial port (e.g., /dev/ttyUSB0), baud rate (e.g., 9600), parity, and stop bits to match your slave device's specifications for reliable data acquisition.

Yes, the CM4 is installed on a socketed connector. You can upgrade to a different CM4 variant with more RAM, storage, or wireless capabilities, provided it is compatible with the carrier board design. Power down the unit, open the enclosure, carefully release the connector latch, and swap the module. Note that a CM4 with eMMC is required for the onboard storage; a lite version without eMMC would need an external boot device. Re-flashing the SenseCAP OS or your chosen OS onto the new module will be necessary.

The gateway includes an internal M.2 (Key B) slot for a 4G LTE module (e.g., Quectel EC25 or similar). Install the module, connect the provided LTE antenna to the SMA port labeled 'LTE', and insert a SIM card into the onboard slot. The SenseCAP OS typically includes drivers for common modems. After boot, you can configure the cellular interface as a WAN backup or primary connection through the network settings in the web interface, using standard AT commands for APN configuration provided by your carrier.

Use the provided screw terminal block adapter connected to the DC jack. The gateway accepts a wide 9-36V DC input, making it compatible with standard 12V or 24V industrial power supplies. Ensure the power source can deliver sufficient current (typically 1-2A). For AC power, a 12-24V AC transformer with a DC output can be used. The unit includes overvoltage protection up to 40V. Always observe proper polarity when wiring the terminal block for safe and reliable operation.