JW-LWN-K21(M01) LoRaWAN RS485 Data Transmission Unit is a high performance, low power wireless DTU designed to connect RS485 field devices to LoRaWAN IoT platforms. It combines long range communication, flexible protocol adaptation, and reliable industrial design, making it ideal for remote data collection and control in complex outdoor and industrial environments.
With support for battery operation, standard LoRaWAN networking, third party platform integration, and edge computing logic, KC21 is well suited for remote meter reading, water and weather monitoring, industrial sites, and sensor powered acquisition applications.
2. Product Overview
JW-LWN-K21(M01)is developed for users who need a stable and energy efficient way to bring RS485 devices online through a LoRaWAN network. It integrates an MCU and LoRa radio chip, supports standard RS485 interfaces, and transmits collected data to an IoT platform through the LoRaWAN protocol.
This device supports mainstream LoRaWAN ecosystems such as ThinkLink, ChirpStack, and The Things Network TTN, enabling efficient deployment across different projects. It also supports an EB virtual machine for custom business logic, remote firmware updates through FUOTA, and protocol adaptation for devices using Modbus and other common RS485 based communication protocols.
Item
Specification
Product Model
KC21
Product Type
LoRaWAN RS485 Data Transmission Unit
Interface Type
1 PG7 waterproof connector
Wiring
4 wires VCC GND 485A 485B
Communication Protocol
Standard LoRaWAN
Regional Standards
CN470 EU433 EU868 AS923 AU915 US902
Max Transmit Power
Up to 22 dBm
Receiver Sensitivity
-142 dBm at SF12 BW125kHz
Network Access
OTAA ABP
LoRaWAN Class
Class A for battery version Class C for powered version
Power Supply
Built in battery version or DC powered version
Battery Capacity
10800 mAh
Sleep Current
Less than 5 uA
Transmit Current
Less than 110 mA at 22 dBm
Operating Temperature
-40°C to 85°C
Relative Humidity
Up to 95 percent non condensing
Protection Rating
IP65
Material
ABS plus PC
Color
White
Dimensions
120 x 72 x 28 mm
Installation
Wall mounted
3. Application Scenarios
Industrial site RS485 device data acquisition
Water meter and heat meter remote reading
Hydrology and meteorological monitoring
Water quality sensor data transmission
PT100 sensor powered acquisition projects
Smart utility metering
Environmental monitoring systems
Energy management and remote equipment monitoring
4. Communication and Platform Compatibility
KC21 is designed for convenient integration into modern IoT systems. It supports:
Standard LoRaWAN networking
ThinkLink platform integration
ChirpStack integration
The Things Network TTN integration
RS485 based field device access
Edge logic and remote firmware management
This makes it an excellent choice for scalable remote monitoring projects.
5. Installation Highlights
Wall mounted structure for fast deployment
Waterproof PG7 connector for reliable field wiring
RS485A and RS485B connection for external device communication
VCC and GND wiring for power connection depending on version
Magnetic trigger method for communication test and network join operation
FAQ
Q
1. What is the KC21 used for?
A
KC21 is used to connect RS485 devices to a LoRaWAN network for remote data collection, meter reading, and industrial monitoring.
Q
2. Does JW-IoT KC21 support third party LoRaWAN platforms?
A
Yes. JW-IoT KC21 supports integration with mainstream platforms such as ThinkLink, ChirpStack, and TTN.
Q
3. Can this device operate on battery power?
A
Yes. The battery version uses 4 ER14505 lithium batteries with a total capacity of 10800 mAh, making it suitable for long term low maintenance deployment.
Q
4. What kinds of devices can be connected to the RS485 interface?
A
It can connect to many RS485 based devices such as water meters, heat meters, industrial instruments, water quality sensors, and other monitoring equipment.
Q
5. Does JW-IoT KC21 support remote firmware upgrades?
A
Yes. JW-IoT KC21 supports FUOTA remote upgrade, helping reduce maintenance effort in large scale deployments.
Q
6. Is the device suitable for outdoor use?
A
Yes. The enclosure is rated IP65, and the device is designed to work in harsh environments with an operating temperature range of -40°C to 85°C.
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