Fraunhofer Institute for Integrated Circuits IISInductive data transmission involves employing the magnetic coupling of adjacent circuits specifically to transmit data between two devices. At low frequencies, loudspeaker components are also capable of such coupling effects. From this we developed a solution for controlling devices easily using a smartphone: users simply select the desired device configurations in an app, which then transmits them via the phone’s speakers to, say, their coffee machine, heating system or fitness equipment. With little effort, this turns smartphones, together with the appropriate apps or web applications, into universal control units for any IoT device.
The Internet of Things in Your Hand
© Stanisic Vladimir – stock.adobe.com
IoT Device Control and Configuration via Inductive Data Transmission
The technical details
- Frequency
18.5 kHz - Modulation type
MSK (minimum shift keying) - Symbol rate
1200 baud/s - Range
5 to 20 cm - Standby power consumption
about 20 μA (depending on the microcontroller)
Feature upgrade for smart devices
Inductive data transmission via loudspeakers gives every smart device a simple and useful feature upgrade.
How you can use the technology
Do you want to make it as easy and convenient as possible for the users of your smart products to adjust all device settings while avoiding the complex integration of a radio module? Then inductive data transmission via loudspeaker is the ideal solution.
Under the name “Magnolinq”, the patented technology is available through LZE GmbH as a product-related implementation. An evaluation kit is also available, with which Magnolinq can first be integrated into a product prototype for testing.
LZE GmbH is part of a joint initiative of the Fraunhofer Institutes for Integrated Circuits IIS and for Integrated Systems and Device Technology IISB with Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU).