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With the CMi4160, Elvaco offers a meter communication module that has been specially developed as an easy-to-use and cost-effective solution for transmitting data from the heat meter Diehl Metering SHARKY 775 to a receiving server. The device is mounted internally in the meter and works on the basis of the IoT technology LoRaWAN. The internal Meter Connectivity Module (MCM) is characterized by a long battery life of 11 years, high energy efficiency and a long communication range. Last but not least, the CMi4160 can easily be retrofitted into already installed meters.

CMi4160 - Integrated MCM for Diehl Metering SHARKY 775

The rapid growth of IoT (“Internet of things”) has resulted in new communication techniques, specifically developed to meet the growing demand of high energy-efficiency and long range. LoRaWAN is one such technique. CMi4160 is mounted inside a Diehl Metering SHARKY 775 to deliver meter data to a receiving server via a LoRaWAN network. The product has 11 years of battery life, is energy-efficient, has a long communication range and is easily retrofitted inside an already deployed meter. CMi4160 is easily configured through Elvaco OTC (via NFC). With CMi4160, Elvaco offers a meter communication module designed for customers that require a user-friendly and cost-effective solution.

The CMi4160 is a robust and compact device with an NFC antenna, which has a ribbon cable as an interface to the meter. Two colored LEDs indicate the current status of the CMi4160, while switching on/off and rebooting works by pressing the pushbutton. The CMi4160 is particularly easy to configure using NFC via the associated Elvaco OTC app. 

A total of six different message formats such as the M-Bus encoded Standard and Compact are supported by the CMi4160. The regularity of communication between the meter module and the server can be individually adjusted by configuring a transmission interval. The CMi4160 is equipped with an EcoMode, which increases the maximum battery life to a duration of more than eleven years. This special mode regulates the transmission interval, which consumes significantly less energy than in normal operation. Last but not least, the practical configuration lock effectively prevents unauthorized persons from accessing the meter communication module.

  • Total: 2
  • Total: 2


Electrical connections

Electrical characteristics

Environmental specifications

Temperature sensor, margin of error

Humidity sensor, margin of error

User interface


Wireless M-Bus

Integrated M-Bus Master

Wireless M-Bus Receiver

M-Bus slave interface


Data storage (examples)

Mobile Network

Fixed Network (Ethernet)



Connections and Interfaces


To extend the functionality of the SHARKY 775 heat meter from Diehl Metering, the Meter Connectivity Module (MCM) CMi4160 is the ideal solution. The meter communication module enables the transmission of meter data to the received server by mounting it internally in the meter and accessing the LoRaWAN network. The decisive advantages of the CMi4160 are the long communication range, a long battery life of eleven years and the resulting first-class energy efficiency.

The CMi4160 is particularly easy to handle thanks to the NFC configuration, which takes place in conjunction with the associated Elvaco OTC app. In this way, numerous parameters such as the transmission interval can be set individually or the energy-saving EcoMode and the configuration lock can be set up.