The Retrotouch EnOcean Smart Kinetic Switch (868 MHz) is an architectural, batteryless wireless control interface. By leveraging localized mechanical energy harvesting, the device entirely eliminates the maintenance overhead of batteries and the infrastructure costs of hardwired control lines.

1. Electromechanical Power Generation

The core of the Retrotouch module functions as a micro-scale power generator operating via Faraday's Law of Induction. The hardware maintains a0V DC baseline and requires zero external mains power.

• The Kinetic Mechanism: Pressing a physical glass rocker loads an internal mechanical leaf spring. Once a specific force threshold is met, an over-center mechanism triggers a rapid snap-action movement.

• The Induction Phase: This snap action drives a miniature permanent magnet through a highly dense, stationary copper coil loop.

• The Energy Yield: The instantaneous change in magnetic flux induces a brief, localized electrical voltage pulse. A single physical actuation reliably captures between 120 mu J to 210 muJ (microjoules) of raw energy.

• Rectification & Storage: This brief AC spike passes into an internal energy management circuit featuring ultra-efficient Schottky diode rectifiers and a small capacitor bank. It is instantly smoothed into a stable DC current, waking up the onboard radio frequency (RF) microprocessor.

2. RF Transceiver & Signal Profile

Because the kinetic module cannot remain awake to "listen" for a clear channel or await an acknowledgment frame from the receiver, it relies on an ultra-lean data architecture to transmit its payload before the stored microjoules of energy dissipate.

3. Communication Protocol Architecture (EEP)

The module communicates natively using the standardized EnOcean Equipment Profiles (EEP) open-source taxonomy. This ensures that any device certified by the EnOcean Alliance (such as NodOn relays) can seamlessly interpret the payload.

The Retrotouch module utilizes the EEP: F6-02-01 (Rocker Switch, 2 Rockers) profile:

• Action and Release States: The module does not just transmit when pushed down; the internal spring mechanism generates a secondary, smaller voltage spike when the rocker snaps back up to its rest position. It transmits a distinct Energy Bow = 1 (Press) and Energy Bow = 0 (Release) code.

• Dimming Logic: This dual-packet handling allows receivers like NodOn relays to process dimming loops. If the receiver catches a "Press" frame without an immediate "Release" frame, it calculates a time-delay loop to continuously step lighting brightness up or down until the "Release" telegram arrives.

4. Hardware Interface Matrix

Internally, the transmitter module features four localized mechanical contact nipples, segmented into Channel A (Left) and Channel B (Right).

The physical configuration of your Retrotouch glass kit dictates how these contactors are triggered:

5. Structural Deployment Constraints

While $868\text{ MHz}$ signals offer vastly superior material penetration compared to high-frequency protocols like 2.4GHz Zigbee or Wi-Fi, structural installation design must account for the following attenuation indices: