EnOcean, a developer of energy harvesting wireless technology, has launched the latest generation of its established PTM 215 switch module to include an integrated NFC interface and safety functions.
The NFC integration allows battery-free switches to be operated automatically with NFC readers and NFC-capable smartphones or tablets, in addition to the already proven method “press button”.
Through the NFC interface, users can access individual settings and set security features using the EnOcean Tool app. Providing additional setting options, the NFC interface allows the devices to be integrated easily and automatically into existing systems.
Four million PTM 2xx devices have already been installed worldwide. Switches that have already been installed can be configured with the app as the module does not need to be removed from the switch housing.
Although this is a new generation of the module, it has kept the successful original PTM form factor, allowing it to continue to fit into common switch designs for a battery-free control of lights, shutters and consumers in smart homes and building automation.
Inside, the switch module still combines the ECO 200 electromechanical energy converter with an efficient radio module for an optimum energy yield at each keystroke and maximum transmission power.
The switch module with NFC has the same original PTM form factor as all PTM switch modules form EnOcean, so it fits into all common switch frames.
Commissioning via the NFC interface with read and write function enables a variety of applications, including easy activation of the security mode.
NFC commissioning allows projects to be digitally documented with all relevant data for encryption stored in a project database, while also allowing a clear product identification.
As an operational function, the product ID can be inscribed with all characteristics such as switch design and function. The product ID then enables the installer to know in advance whether the switch module has been preconfigured for single or double rocker switchers.
For remote commissioning, the app also receives all necessary information via the NFC interface. In addition, the rolling code is sent as a sequence code with each telegram, as is common with other protocols, which means that the initial teach-in telegram is no longer necessary.
When exchanging data via NFC, the NFC device and NFC reader must not be more than two centimetres apart, demonstrating a high level of data protection.
Adding to this high level of protection, the device keys for EnOcean radio communication via NFC can be changed but not read, complying with the current security standards of the EnOcean Alliance.
The rolling code, a continuously incrementing counter for concealment and authentication, is sent with each transmission, making desyncronisation of transmitter and receiver impossible.
It is also key to note that the new PTM switch module is backwards compatible with the functional modes of the previous generation of the PTM 210/215.