Wireless M-Bus Gateway V4
Description
Gateway for regular remote reading of up to 64,000 wireless M-Bus (868 MHz) and Sensus RF consumption meters (e.g. water meters, heat cost allocators) via NB-IoT, LTE-M mobile radio or LoRaWAN to the Internet. Available with battery, 12 V DC, 230 V AC, or solar power supply. Suitable for indoor and weather-protected outdoor installation. Ideal for intra-year consumption information (uVI) and billing in the housing industry.
Features
→ See Gateway V4 Series — Platform Features for all shared features.
Product Components
- Firmware
- app-nrf91-origin · Firmware updates
- Housing
- LoCube — 122 × 82 × 55 mm
- Power supply
- Battery 38 Ah (Li-SOCl₂, 3.6 V) · External 12 V DC or 230 V AC available
- Optional accessories
- External antenna (SMA) · IP68 encapsulation · LoCube wall mounting kit · Pole mounting kit
Product Identification
- Name: Wireless M-Bus Gateway V4
- Type: LOB-GW4-WMBUS
Variants
The gateway is available with different power supplies. Firmware and functionality are identical; only the power supply, the type designation and the ordering code differ:
| Power supply | Type | Ordering code |
|---|---|---|
| Battery, 2× D-cell 3.6 V, 38 Ah (default) | LOB-GW4-WMBUS | 1200326 |
| External 230 V AC (WAGO terminal) | LOB-GW4-WMBUS-230V | 1200326-1 |
| External 12 V DC (power supply unit) | LOB-GW4-WMBUS-12V | 1200326-2 |
| Solar (2 W cell + backup battery) | LOB-GW4-WMBUS-SUN | 1200326-3 |
Accessories
| Accessory | Notes |
|---|---|
| LoCube Wall Mount | Included with this variant — wall or horizontal pipe |
| LoCube Mast Mount | Metal bracket for vertical pole / mast mounting |
| USB Config Adapter | For local configuration, diagnostics, and firmware updates |
Internal view
- a) Battery connector (XH)
- b) SIM card socket (2FF - Micro)
- c) MicroSD card socket (not supported by firmware)
- Reset button (red button on the left side)
- Status LED (left side, not in picture)
- Configuration adapter (blue connector on the left side)
LED Signal Patterns
The device uses the standard V4 LED signal patterns. See LED Signal Patterns for the full reference.
Configuration
The device is shipped with default configuration parameters. Local changes can be made via the config port using the USB Config Adapter and the Lobaro Config Tool.
For step-by-step instructions, see the Configuration Methods guides:
- 🔌 Local Config via USB — connect directly to the device
- 📡 Remote Config via CoAP — over NB-IoT / LTE-M via Lobaro Platform
- 📻 Remote Config via LoRaWAN — via LoRaWAN downlink
- 🔗 Remote Config via MQTT — for 3rd party MQTT backends
Custom factory configuration is available on request — devices can be pre-configured at production for your specific deployment. Contact sales@lobaro.de when ordering.
Firmware Updates
The latest firmware can be found here:
- Download latest firmware
-
For further information on how to update the device, refer to: Firmware Update.
A remote firmware update over LoRaWAN is currently not possible.
Configuration Parameters
This gateway runs the app-nrf91-origin firmware. To avoid duplication, the parameters are documented centrally with the firmware component and are not repeated here:
- Common firmware parameters — general, wireless M-Bus, LTE and LoRaWAN settings shared by all V4 gateways
LoRaWAN Uplink Formats
- LoRaWAN Protocol — Status Packet (Port 1) and wM-Bus uplink formats
Cellular Uplink (LTE)
Cellular uplink uses CoAP (with the Lobaro IoT Platform) or MQTT for third-party integration. The protocol details are documented centrally with the firmware:
The CoAP implementation details are not publicly disclosed and are intended for use exclusively with the Lobaro IoT Platform. If MQTT is not an option, please contact Lobaro directly.
Wireless M-BUS Parser
A production-ready parser (including split telegram reassembly where applicable, AES-128 decryption for encrypted wM-Bus telegrams, and OMS-compliant data interpretation) is implemented within the Lobaro Platform.
Customers using the Lobaro Platform can utilize this parser directly as part of the platform processing pipeline.
If you are operating a Lobaro Gateway without using the Lobaro Platform, we can provide restricted platform access upon request. This allows you to inspect the parser behavior and use it as a technical reference for your own backend implementation.
Please contact our support team if you require access or further integration details.
Battery Lifetime Estimator
Estimate the expected battery lifetime for typical usage patterns. Adjust the parameters to match your deployment.
Declaration of Conformity
 | Download CE declaration of conformity |