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Description
Characteristics
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Description
Summary
The HRI-485x series comprises a Data Transfer Unit (DTU) device that facilitates wireless data transmission by converting the RS-485 bus. The sub-models of this series enable RS-485 data to be transmitted via multiple communication methods, including LTE (Cat. 1/Cat. 4), private LoRa, standard LoRaWAN, Ethernet, and others. This highly dependable DTU device is suitable for deployment in industrial settings and can be mounted directly on rack rails, thus enabling IoT evolution for previous devices. Additionally, the series features an effortless configuration function that allows for the direct management and configuration of options and parameters within the Local Area Network (LAN).
Main Features
- DC 4.5~28V wide voltage input.
- Rack rails compatible.
- Built in configuration page, without the need for other configuration software, the device can be configured and maintained through the local area network.
- LoRa/LoRaWAN, Ethernet, LTE multiple network modes.
- In LoRa private network mode, it can be configured as point to point, point to many, or mesh mode.
- Support for data encryption,1024 bytes cache, a single packet supports up to 240 bytes.
- Support communication key function, prevent data interception.
- Operating temperature range: -40 ~ 85 °C.
Specifications
| Parameters | Description |
|---|---|
| MCU | ESP32C3-FN4 / ESP32DOWDQ6 |
| LoRa chipset | SX1262 |
| Frequency | 470~490MHz(470M+200K*N) 863~883MHz(863M+200K*N) 902~922MHz(902M+200K*N) N: 0~100 |
| LTE module | Air724UG |
| Rack rail width | 35 mm |
| Max. TX Power | 21±1 dbm |
| Max. Receiving sensitivity | -134dBm |
| Supply voltage | 4.5 ~ 28v |
| Operating temperature | -40 ~ 85℃ |
| Operating humidity | 10%～90%, no-condensing |
| Antenna impedance | 50 Ω |
| Address Code | 0000 ~ FFFF |
| Baud rate | 1200/2400/4800/9600/19200/38400/57600/115200 |
| Buffer | 1024 bytes |
Variance
HRI-4851‘s primary function is to convert the RS485 bus to LoRa wireless signal. Usually works as a node device, P2P control and relayer.
- HRI-4851 supports P2P custom protocol, need work with other HRI-4851 or HRI-5852.
- HRI-485L supports LoRaWAN protocol, need work with a LoRaWAN gateway.
HRI-4852 is a LoRa custom P2P protocol gateway, it transfer LoRa signals from other devices to the cloud server through LTE or Ethernet.
- HRI-4852’s header pins are only used for power supply, it can’t communicate with a RS584 devices.
- HRI-485L is NOT a LoRaWAN gateway, it’s running LoRa custom P2P protocol, only work with HRI-4851 or other Heltec P2P protocol devices.
HRI-4853 is a standalone device which transfer RS-485 to a cloud server via LTE or Ethernet network.
- HRI-4853 don’t have LoRa function included.
- HRI-4853 can work independently by use LET network or connect to a router/exchanger, don’t need any additional devices or gateway.
Description
Easy config
Power on and connect the terminal
Scan and registration
Configure
For more detailed configuration methods, please refer to the HRI-485x series Quick Start documentation.
High light
FAQ
All HRI-485X series can upgrade firmware via OTA.
No, the WiFi function only used for OTA upgrade.
No. It is usually only used as a tool for HRI-4851 to enter the network.
Docs & Resource
- [Resource] — HRI-485X series user manual
- [Attachment] — HRI-485X series datasheet
- [Attachment] — HRI-485X application example
- [Resource] — HRI-485X LoRaWAN firmware (The firmware version must correspond to the product model)
Packing list
The default packing list without selecting any accessories is as follows:
| Item | Quantity |
|---|---|
| RS485 Wireless Converter | x1 |
| Glue Rod Antenna | x1 |
Characteristics
| Weight | 90 g |
|---|---|
| Dimensions | 12 × 7 × 3.2 cm |
| Model | HRI-4851(Custom LoRa), HRI-4851L(LoRaWAN), HRI-4852(HRI-4851 to Server), HRI-4853(RS-485 to Server) |
| LoRa Band | 433MHz, 470~510MHz, 863~870MHz, 902~928MHz, N/A |
| LTE Version | Yes, No, N/A |
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RS485 Wireless Converter
What's this?
A device that converts 485 bus into LoRa, LTE, and Ethernet communication.
Price range: $17.90 through $27.90
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