With the modernization of district heating systems, many older residential communities are upgrading traditional heat meters to smart metering systems. Manual meter reading is inefficient and lacks real-time monitoring capability.
By combining LoRaWAN wireless communication, M-Bus data acquisition, and an IoT platform, heat meters can be remotely monitored without large-scale infrastructure reconstruction.
This article introduces a LoRaWAN-based wireless heat meter reading solution, including system architecture, device selection, and platform capabilities.
System Architecture
Network Topology
The system architecture is as follows:
Heat Meters → KC22 M-Bus Collector → LoRaWAN Gateway → ThinkLink IoT Platform
The KC22 device collects data from multiple heat meters and transmits it via LoRaWAN gateways to the platform.
System Components
| Device Type | Model | Function |
|---|---|---|
| M-Bus to LoRaWAN Collector | KC22 | Collects meter data and converts it to LoRaWAN |
| Outdoor LoRaWAN Gateway | GDO514-AGCN470-N-2 | Receives LoRaWAN data |
| IoT Platform | ThinkLink | Data management and analytics |
KC22 Data Collector
Key Features
| Feature | Description |
|---|---|
| M-Bus communication | Connects to heat meters |
| Protocol support | CJ/T188 heat meter protocol |
| Local data parsing | Decodes data locally |
| LoRaWAN transmission | Sends structured data to gateway |
| EdgeBus VM | Supports TypeScript logic |
| Remote configuration | Modify sampling parameters remotely |
| Low power design | Sleep mode outside heating season |
Technical Specifications
| Parameter | Value |
|---|---|
| Meter capacity | Up to 4 heat meters |
| Battery life | More than 8 years |
| Communication protocol | LoRaWAN / M-Bus |
| M-Bus standard | CJ/T188 |
| Data rate | 2400 bps |
| Data format | 8 data bits |
| Parity | Even |
| Stop bit | 1 |
| Protection | IP65 |
GDO514 LoRaWAN Gateway
Key Features
| Feature | Description |
|---|---|
| Long range communication | LoRaWAN wireless coverage |
| Multi-channel reception | Handles multiple devices |
| Data forwarding | Sends data to IoT platform |
| Remote management | Supports remote maintenance |
Technical Specifications
| Parameter | Value |
|---|---|
| Model | GDO514-AGCN470-N-2 |
| Channels | 4 |
| Frequency | CN470 |
| Backhaul | 4G cellular |
| Installation | Outdoor |
| Protection | IP65 |
Typically, one gateway can cover around five residential buildings depending on the environment.
ThinkLink IoT Platform
Core Platform Features
| Module | Description |
|---|---|
| Data collection | Collects meter data |
| Visualization | Historical data charts |
| Data analytics | Temperature and flow analysis |
| Alarm system | Device offline alerts |
| Energy analysis | Heating energy monitoring |
| Integration | MQTT API support |
| Dashboard | Visual monitoring interface |
Solution Advantages
| Advantage | Description |
|---|---|
| Strong protocol compatibility | Supports multiple heat meter protocols |
| Wide coverage | LoRaWAN enables large area coverage |
| Easy deployment | Simple installation via M-Bus |
| Low maintenance cost | Long battery life |
| Flexible data applications | Energy and cost analysis |