Communication and Cloud
The analyzer provides several communication interfaces, for sending data to the cloud and for integration with local supervision systems. The available interfaces depend on the product variant:
| Interface | RE-431-D | RE-431-D-RS485 | RE-431-D-LW |
|---|---|---|---|
| Wi-Fi | ✅ | ✅ | ✅ |
| Bluetooth LE | ✅ | ✅ | ✅ |
| MQTT / MQTTs (cloud) | ✅ | ✅ | ✅ |
| Modbus TCP | ✅ | ✅ | ✅ |
| Modbus RTU (RS485) | — | ✅ | — |
| LoRaWAN | — | — | ✅ |
Wi-Fi connection
The initial Wi-Fi network configuration is done through the Wi-Fi Setup procedure, described in the Installation page. The connection status, SSID, IP address and network parameters can be viewed from the menu:
Settings → Communication → Network → Wi-Fi
The IP address can be assigned automatically (DHCP) or set manually (Static) from the IP Mode menu and the related IPv4 fields.
For stable operation, a Wi-Fi signal stronger than -70 dB is recommended.
Sending data to the cloud (MQTT)
Measurement data is sent to the cloud via the MQTT protocol, with optional TLS (MQTTs) encryption. Access to historical and real-time data is provided through the Web Dashboard.
MQTT publishing can be enabled or disabled from the menu:
Settings → Communication → MQTT
The MQTT connection status is indicated by the dedicated badge in the display status bar and by the front LED (green = connected).
Modbus TCP
All models expose the measured quantities and energy counters via Modbus TCP on the standard port 502. The interface is enabled from the menu:
Settings → Communication → Modbus TCP
For the complete register mapping, see the Modbus Register Map page.
Modbus RTU (RE-431-D-RS485 only)
The RE-431-D-RS485 variant has an RS485 interface for Modbus RTU. The parameters are configurable from the menu:
Settings → Communication → Modbus RTU
| Parameter | Values |
|---|---|
| Slave ID | 1 to 247 |
| Baud rate | 9600, 19200, 38400, 57600, 115200 |
| Parity | 8N1, 8E1, 8O1 |
The exposed registers are the same as Modbus TCP (see Modbus Register Map).
LoRaWAN (RE-431-D-LW only)
The RE-431-D-LW variant integrates LoRaWAN connectivity for the periodic transmission of measurement data over long-range, low-power networks, particularly useful where Wi-Fi coverage is not available.
Accessing data: Web Dashboard
The data collected during measurements is made available in the cloud and can be viewed through the Web Dashboard. For the configuration of local administrative access to the device (Web Admin), see the Security and Access page.