EVBUM2596/D Energy Harvesting Bluetooth Low Energy Switch User Guide Overview www.onsemi.com The Energy Harvesting Bluetooth Low Energy Switch reference design is battery-free Bluetooth switch based on the RSL10 SIP, the the industrys lowest power Bluetooth 5 radio integrated into EVAL BOARD USERS MANUAL a complete System-in-Package (SiP) solution. The energy harvested from the actuation of the switch using the ZF AFIG 0007 generator is sufficient to communicate the switch actuation via Bluetooth Low Energy reliably without the need for any additional battery. With the wide input voltage range of the RSL10 (1.13.3 V) no external DC/DC converters are required on the board. The Bluetooth Low Energy switch is preloaded with energy harvesting sample code that can be demonstrated using standard Beacon mobile applications. This code can be easily customized using the RSL10 Software Development Kit (SDK), including the ability to add or remove functionalities, modify beacon sample code, and more. The Switch is also compatible with the Bluetooth IoT Development Kit (BIDK) and IoT Development Kits. In that case, the Bluetooth baseboard/shield acts as a receiver of beacon messages from the switch. Designers can use the BIDK baseboard on its own, or add shield boards to the IDK to incorporate additional sensor and actuator functionalities to the application design at their convenience. Software and Tool Resources Key System Specifications RSL10 Software Development Kit (SDK) Inductive Generator: The Energy Required for Data Transmission is Created by the Mechanical Actuation of the Switch. Energy Energy Harvesting Bluetooth Low Energy Generated: 300 J Switch Source Code Miniature Design Combined with Extremely High Energy Output Beacon Monitoring App (Android or Long Mechanical Life (Minimum 1 million Switch Operations) IOS ) including Beacon Scanner, Beacon Manager, BLE Scanner, or CZBLEcontrol Mono-stable/Momentary Design: Switching Mechanism Returns to JTAG Programmer (e.g., SEGGER Starting Position after Release (Pushbutton) JLink Ultra+) (Optional) Bi-stable/Latching Design: Switching Mechanism with Two Rest Positions (e. g., On/Off Switch) Possible by Replacing More Information Generator with ZF AFIG00010 RSL10 SIP Datasheet Bluetooth 5 Compliant (RSL10 SIP) RSL10 Eddystone Beacon Application Note Dimensions: 23.6 23.6 21.2 mm (AND9710/D) Temperature range: 40 to + 85C Getting Started with RSL10 (AND9697/D) No EMC Required due to Low Energy used by the Switch Semiconductor Components Industries, LLC, 2018 1 Publication Order Number: July, 2019 Rev. 1 EVBUM2596/DEVBUM2596/D GETTING STARTED WITH THE ENERGY The advertising packets sent by the energy harvesting HARVESTING BLUETOOTH LOW ENERGY switch can also be received by other Bluetooth Low Energy SWITCH capable devices. This includes the RSL10 device itself. Eddystone Beacon Demonstration Hardware Overview The Energy Harvesting Bluetooth Low Energy switch The Switch device can be used straight out of the box by board is preloaded with sample code that demonstrates the clicking the harvesting switch (Figure1). This section capabilities of the energy harvesting solution. After the describes additional methods to reduce the system switch is pressed, advertising packets are sent out every form-factor. 20 ms until the harvested energy is consumed. Caution:When reducing the size of the device (as described below) certain functionalities of the reference design will no longer be possible (e.g., reprogramming the Bluetooth Low Energy device (see Figures 6 and 7), or using the harvester power source for powering another board (see Figure 12)) Removing of the Boards Wings and Mounting into an Enclosure If the smallest possible form factor is desired, the main functional part of the board, consisting of the ZF harvesting Figure 1. Pressing the Harvesting Switch switch, energy storage, voltage clamping and the RSL10 System in Package (SiP) can be separated. All of this With every switch actuation, an Eddystone-URL frame is essential functionality is located on the central section of the transmitted. This packet contains a link to evaluation board. The left and right wings of the board only www.onsemi.com/idk. The subsequent frames are contain mounting holes and the programming interface with Eddystone-TLM frames. These contain telemetry data like programming power connector and a location for mounting the supply-voltage, total number of packets sent since the different storage capacitors. press/release of the button and the associated up time. For Important: The main programming interfaces are located more information on using the Eddystone beacon protocol on the wings. Once removed, re-programming is only for RSL10, refer to the Eddystone Beacon application note possible by soldering the programming connections onto the (AND9710/D). board. NOTE: When the switch is used without an additional enclosure, it is important to ensure that the white The wings can easily be broken off along the axes shown plastic piece on top of the generator can move in Figure 3. freely in the direction of the actuation (See Figure 1). If blocked, it can affect performance by reducing the amount of energy harvested. The transmitted Eddystone-URL and TLM frames can be captured and displayed using a smartphone and one of the available beacon apps (listed above in Software and Tool Resources). Figure 3. Breaking Axes Depending on the used enclosure, it might be necessary to smoothen the edges after breaking as shown in Figure 4. Figure5 shows and example of the harvesting switch mounted in an plastic enclosure. Figure 2. Examples of Beacon Monitoring Apps www.onsemi.com 2