About the Product:

These 433 MHz units can be used with Solar electrical meters, solar inverters, or any Modbus device to the controller, using the LoRa radio setting, without the need for a long cable connection.

For further information, you can look at https://hvacproducts.co.uk/product/lora-wireless-rs485-transmitter-and-receiver-with-lcd-screen-2-units/

You can have 1 unit installed on your controller or solar inverter and connect up to 32 meters to it, as long as each unit has a different Modbus address. The LoRaWAN Data Transmission Terminal is a universal communication terminal designed and manufactured around the LoRa RF chip. It integrates two industrial-standard RS485 interfaces and supports a variety of protocols to realise data transmission between wired and wireless devices. It supports the LoRaWAN Class C protocol. It can be widely applied to IoT, centralised metering, and industrial control, among other areas. LoRa data transmission terminals universal communication interface equipment. Allows wireless transmission of RS485 data, eliminating the need to run long cables in complex installs. Includes a pair of communicators (transmitter and receiver), each unit is a transceiver (can be a receiver or transmitter – two-way traffic to each other). Note: If more than one LoRa transmitter/receiver set is used on-site with different baud rates or parity settings, they must operate on different communication channels. IMPORTANT: ALWAYS CONNECT THE ANTENNA BEFORE POWERING UP THE TRANSMITTER OR RECEIVER

Key features:

- Small, easy-to-install
- Operating temperature range: -20 to 70 ^oC
- 1 standard interface of RS485, supporting a variety of protocols and communicating with various automatic devices with RS485 interfaces
- Equipped LoRa chips SX1276 from Semtech for the RF part
- Supporting LoRaWAN Class C protocol
- Band: 433 Mhz
- Wireless ultra-long transmission range with up to 6-8 km barrier-free
- 1.9-meter Antenna lead with magnetic base Antenna 413-453 MHZ
- Display interface: 128×64 lattice OLED, which can query power parameters on site
- Switching function: 1 way 5A relay switch output, L to Y0

Mostly used in metering projects where cabling is expensive or not possible. This module helps integrate remote Modbus meters and IO modules without the need for long cable runs.

Communication

Interface RS485 half-duplex
Protocols: MODBUS RTU, DL/T 645
Baud rate: 1200, 2400, 4800 or 9600 bps, 8N1, 8E1 or 8O1
Packet Length Sent 255 bytes
Packet Length Received 255 bytes

System Modes

LoRa Radio – Long Range Radio, and is mainly targeted for M2M and IoT networks. This technology will enable public or multi-tenant networks to connect multiple applications running on the same network.
LoRa PMAC – Basic LoRa connection example, sending and receiving data. In LoRa–MAC mode, the LoRaWAN layer is bypassed, and the radio is used directly.
LoRa WAN – Low-power, wide-area networking protocol built on top of the LoRa radio modulation technique.

Power supply

220V/230Vac ±20% 45-65Hz
Power Consumption <1W

Housing

Dimension: 90mm long x 60mm Depth x 37mm Width.
Construction: plastic, self-extinguishing (PC/ABS)
DIN rail mounting (DIN EN 50022 norm)
Cooling: internal air circulation

Environments

Operating temperature: -25°C to 55°C
Storage temperature: -40°C to 85°C
Relative humidity: 5 to 95%, no condensation, no frost
Ingress Protection Rating: IP40 – for indoor installation

Technical Parameters

Working Frequency Range: 433 MHz
ISM Band: 433 MHz
Antenna Impedance: 50 Ohms
Output Power: 18 dBm 100mA
Sensitivity: -139 dBm
Sending Packet Length: 255 bytes
Receiving Packet Length: 255 bytes
Communication Range: 6-8 km

Documentation & Downloads

LoRaWa_FUNC_Manual lora-2022-manual OBM_LoRa_223

Software to Download:
USB-RS485 Driver Software to Download
Modbus_Serial_Scan Software to Download

YouTube Video of LoRa Setup