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Gateway V4 Repeater

Description​

Repeater for wireless M-Bus meter reading — extends the range of wireless M-Bus networks by re-transmitting telegrams from meters to a Gateway V4. The repeater appends its own footer to each retransmitted telegram, including its serial number and received signal strength (RSSI). Suitable for indoor and weather-protected outdoor installation.

Features​

  • Wireless M-Bus repeater (868 MHz, C1/T1 and S1 modes)
  • Appends repeater footer with RSSI and serial number to each retransmitted telegram
  • Configurable hop count for multi-hop repeater chains
  • Install mode: green LED blinks on each received packet for easy deployment
  • RTC (real-time clock) on the Repeater Add-On board for timestamped status telegrams
  • Local configuration only via USB Config Adapter (no cloud connectivity, no remote config)
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: Gateway V4 Repeater
  • Type: LOB-GW4-Repeater
  • Ordering code: 1201298

LED Signal Patterns​

The device uses the standard V4 LED signal patterns. See LED Signal Patterns for the full reference.

During install mode, the green LED blinks on each received packet (or every second). Install mode is active for the first hour after reboot.

Configuration​

Configuration is done locally only via the USB Config Adapter and the Lobaro Config Tool. Remote configuration (CoAP / MQTT / LoRaWAN downlink) is not supported.

Configuration Parameters​

Repeater-only parameters

The Gateway V4 Repeater does not use most of the standard app-nrf91-origin parameters. There is no cloud upload, no NB-IoT/LTE-M/LoRaWAN upload configuration, and no platform connectivity. Only the parameters listed on the Repeater Add-On configuration page apply.

Firmware Updates​

The latest firmware can be found here:

note

A remote firmware update over LoRaWAN is currently not possible.

Upload Formats​

Unlike other Gateway V4 variants, the Repeater has no cloud connectivity — it does not send data to any backend. Instead, it re-transmits received wM-Bus telegrams over the air with an appended footer. A receiving wM-Bus gateway (e.g. a Gateway V4) then handles the cloud upload.

Repeated wM-Bus Telegrams​

The repeater appends a Lobaro footer to each re-transmitted telegram:

Lobaro repeater footer format
  • Serial number — BCD-encoded, uses the wM-Bus ID format
  • RSSI — signal strength at which the repeater received the original telegram

Own Status Telegrams​

The repeater periodically sends its own wM-Bus status telegram:

Lobaro repeater status telegram format
  • Serial number — used as wM-Bus sender address
  • TPL.acc — access number, incremented with each status telegram
  • TPL.sts — 0x00 = OK, 0x43 = RTC error alarm
  • DateTime — 6 bytes: second, minute, hour, day, month (1–12), year (0–99)
  • txPacketCounter — number of re-transmitted telegrams since reboot