For a residential smart-home retrofit project (without touching the existing wiring), EnOcean is the dominant choice: battery-less wireless push-buttons replace conventional switches, ambient sensors are added on top, and integration runs through an Apple HomeKit or Matter gateway.
True
EnOcean dominates the no-rewire residential retrofit market for three reasons. Wireless self-powered push-buttons can be stuck to any wall without chasing in cable. Sensors for temperature, presence and window contact extend the system without adding maintenance burden. Gateways such as Eltako eFusion, NodOn Gateway and various HomeBridge / Home Assistant integrations expose the devices to HomeKit, Google Home, Alexa or Matter. Compared with Wi-Fi, there is no router saturation and no power draw; compared with Zigbee or Z-Wave, there are no batteries to replace every few years.
When briefing a homeowner, always raise battery-replacement cost over 20 years; the comparison with Zigbee usually swings the decision once the labour cost of changing dozens of cells is made explicit.
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Related questions
- EnOcean is best known for its battery-less devices: energy is harvested from a piezo-electric element (mechanical push-button), a solar cell (sensors with a small photovoltaic panel) or a Peltier element (thermal gradient), eliminating battery maintenance over a 10 to 20 year service life.1. Architecture · Energy Harvesting
- The EEP (EnOcean Equipment Profile) identifies each device type by a RORG-FUNC-TYPE triplet (e.g. F6-02-01 = 2-channel Rocker push-button), enabling a receiver to decode the telegram correctly without any manual configuration.2. EEP · EnOcean Equipment Profile
- In the EnOcean Teach-In process, the transmitting device sends a special telegram containing its EEP and Device ID; the receiver memorises this information so it can decode later telegrams correctly and bind the sender to a specific action.2. EEP · Auto-Learn
- ESP3 (EnOcean Serial Protocol v3) is the communication protocol between an EnOcean radio module (TCM 310 / TCM 515) and a host gateway or PC over a UART link: packets begin with the sync byte 0x55, followed by a header, a data section and a CRC8.3. ESP3 protocol · Serielles Protokoll
- EnOcean Secure uses a rolling code (an incremental counter) together with a CMAC (Cipher-based MAC built on AES-128) to authenticate every telegram and block replay attacks, which is critical for security-grade applications such as alarms and wireless locks.6. Security · Rolling Code