Tunnel – Reading data from W-Mbus water meters and sending it transparently to the MQTT platform. Configuration of time windows and filter by manufacturer.

Scenario details:

• We need to monitor 300 W-Mbus pulse counters from the manufacturer Adeunis
• Each counter emits 1 RF frame with the counting data every 1 minute, but only the W-Mbus concentrator must store and send to the data platform 1 frame every hour, in other words, the concentrator must configure time windows of 1 hour
• The meters will be installed in an urban area with many other W-Mbus devices nearby, so a filter must be configured, in addition to the aforementioned 1 hour window, so that only the meters from a certain manufacturer are read: Adeunis
• The data must be read and stored within the hub’s memory and automatically sent to a platform via MQTT using a JSON object whenever there is data coverage. To save data, the W-Mbus frame must be base-64 encoded

Solution: MTX-Tunnel firmware + MTX-IoT-S [4-N]

Example of configuration (config.txt file):

Details:

• After the configuration is carried out, the MTX-Tunnel will store in memory a single frame of each W-Mbus device from the manufacturer Adeunis. Said data will be logged in RAM (it could be in flash if necessary modifying the configuration), encapsulated in JSON format and sent to an MQTT broker at topic / LOGGER. The data corresponding to the counter within the JSON, will be encoded in BASE64.
  Example:{“IMEI”:”354033091777774”,”TYPE”:”WMBUS”,”TS”:”2020-12-11T08:58:07Z”,”WDATA”:”HURGBioQACABG3IqEAAgRgYBGz8AAAAEZrcAAAASLw==”}Where:
  IMEI: the IMEI of the modem sending the data
  TYPE: type of frame sent
  TS: Timestamp of when the W-Mbus frame was collected in the MTX-Tunnel
  WDATA: W-Mbus data in BASE64 format