Information and contact

Technical support for customers

You have bought an eQ-3 product. Do you have a question about its function? You can find our FAQ here.

Alternatively, our technical support can also help. Send us a specific description as well as photos, screenshots or videos of your configuration.

You can reach us from Monday to Friday from 9:00 am to 6:00 pm or you can write to us via our contact form.

Technical hotline: +49 (491) 600 8 680
(Mon-Fri 09:00-18:00)

contact form

This is how you create a token in your Homematic IP App:

  • Open the Homematic IP App
  • Open the main menu in the app by using the symbol in the top left corner
  • Select "Info and support"
  • Select "support"
  • confirm with "queries"

Please don’t cancel the token until someone of our support team contacts you. Otherwise the token will lose his valdity. You can leave the menu after the transmission and use the app as usual.

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You can use this contact form to generate a request. This request is sent to us as e-mail via our provider. If there is no legal retention period, your data will be deleted immediately after our reply. A usage for another purpose or an information transmission to a third party does not take place.


In the FAQ section, you will find answers to your questions about eQ-3, our products and technologies.

    • Which protocol does Homematic use?

      The Homematic protocol has been developed by eQ-3 exclusively for applications in smart homes and buildings. The development is based on more than 20 years of experience. Technically, the Homematic protocol is a bidirectional radio protocol. That means, that every receiver is able to confirm a command to the transmitter.

    • How many Homematic devices can I use in my installation?

      It should be considered that the Homematic system has been specified and developed for a “normal” family house. For installations in larger buildings, we recommend e.g. a cooperation with our partner Contronics.

      The system limits per Homematic Central Control Unit CCU2 are specified as follows:

      • 400 radio channels and
      • 127 wired devices in addition.

      Please observe the following:
      The number of wireless devices depends on the number of channels of all used devices!


      • Homematic Wireless Switch Actuator 1 channel has one channel at 400 devices
      • Homematic Wireless Switch Actuator 4 channels has four channels at 100 devices  

      Usually, different devices are used within one installation. From our experience, the maximum number of wireless devices that can be operated trouble-free by the CCU2 within one installation is therefore between 100 and 120 devices.

    • Where can I buy eQ-3 products?

      eQ-3 products like Homematic, Homematic IP and MAX! are distributed by numerous partners. This applies to partners in mail-order business such as the German companies ELV and Conrad Elektronik as well as retailers, installers, system integrators or OEMs, who integrate eQ-3 products into their own solutions. You can find further information here.


In our download area you can find current information about our products and our company, e. g. manuals, software updates or brochures.




Bluetooth® - Smart Lock

Short descr.: Key-BLE

Type of download: Declaration of conformity

Item no.: 142950A0


124,71 KB

HomeMatic Wireless Switch Actuator 1-channel, flush-mount

Short descr.: HM-LC-Sw1-FM

Type of download: Manual

Item no.: 76793


1,83 MB

HomeMatic Wireless Switch Actuator for battery operation

Short descr.: HM-LC-Sw1-Ba-PCB

Type of download: Manual

Item no.: 104895


167,87 KB

HomeMatic Wireless Switch Actuator for battery operation

Short descr.: HM-LC-Sw1-Ba-PCB

Type of download: Product Data Sheet

Item no.: 104895


333,41 KB

HomeMatic Wireless Switch Actuator for battery operation

Short descr.: HM-LC-Sw1-Ba-PCB

Type of download: Declaration of conformity

Item no.: 104895


59,53 KB