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Is there any easy way to replace UART wired communication with Bluetooth Low Energy wireless communication?
Sample software is provided. LAPIS Technology offers a "Serial Communication Sample Application" to transmit data previously sent to UART to target devices using wireless Bluetooth Low Energy communication with easy command operation. Based on this sample application, devices previously controlled via wired communication (UART) can easily be allowed to be wireless ready. This sample software is available on the LAPIS Technology Wireless Support Site.* At the first login, user registration is required. http://www.lapis-semi.com/jp/semicon/telecom/#supportsite-login
Is there any easy way to develop remote controllers that use Bluetooth Low Energy wireless communication?
Sample software is provided. LAPIS Technology is developing "remote control sample application" using the Bluetooth Low Energy advertisement function. The sample software is expected to be released on the LAPIS Technology Wireless Support Site. Be a registered user of this site to receive a notification e-mail when the sample application will be released. It is also possible to develop programs based on one of the sample applications provided by Nordic.
Is there any easy way to transmit sensor data via Bluetooth Low Energy wireless communication?
Sample software is provided. LAPIS Technology is developing a "sensing sample application" to transmit sensing data via Bluetooth Low Energy communication. The sample software is expected to be released on the LAPIS Technology Wireless Support Site. Be a registered user of this site to receive a notification e-mail when the sample application will be released. It is also possible to develop programs based on one of the sample applications provided by Nordic.
Is re-authentication of Bluetooth required when SoftDevice is upgraded?
If the QDID of the End Product certification for SoftDevice changes, product registration will be required. For details, contact a LAPIS Technology certification partner.
Where can QDID for the LAPIS Technology module be found?
Refer to the data sheet.
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ROHM半导体和Würth Elektronik联合推出的无线充电设计套件（订单号760308MP），旨在展示无线充电的优势，并让开发者有机会测试和集成无线充电解决方案。该套件基于Qi 1.2.2规范，支持无线充电联盟（WPC）的扩展功率配置文件（EPP），同时兼容低功率模式（基线功率配置文件）。套件包含发射器模块、接收器模块和LED负载模块，适用于移动无线充电应用。
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Is LE Audio supported?
No, it is not supported. LE Audio is an optional feature of Bluetooth v5.2. Neither MK71511 nor MK71521 supports this function.
Does each Bluetooth Low Energy module unit have a unique device address written?
No, it does not. We do not provide each module with a device address unique to them before shipment.
What types of interfaces does the module have?
SPI (Master/Slave), UART, I2C, PWM, 12bit ADC can be commonly used with MK71511/MK71521. MK71521 has additional I2S and NFC interfaces.
I created a library file using LIBU8, but some of them were not imported. For example, it is a source code (file) in which an interrupt function is defined. All the interrupt functions are static functions. Is it possible to create it as a library in such a case?
Files containing statically declared functions can be registered in library files. However, since it cannot be referenced from the outside, the module in the library cannot be found, and an error occurs when linking and it cannot be used. Create the function to be registered in the library as a global function.
How many target devices can be connected to one Bluetooth Low Energy module at the same time?
The number of units that can be simultaneously connected depends on the SoftDevice used. For S132/S140 up to 20 units can be connected at the same time. For S112/S113 up to four units can be connected at the same time as peripheral devices.
数据表中记载的“Energy Sharing control Operation Example”示意图，在使用2层基板和使用4层基板时有区别吗？
没有，示意图与基板层数无关均可适用。但是，Share功率的发热取决于基板的热阻。
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Is a 32.768 kHz crystal external to the module required?
No. It is not required. Since MK71511/MK71521 feature a built-in 32.768 kHz crystal oscillator, no external crystal is required. Although MK71511A/MK71521A do not contain the 32.768 kHz crystal oscillator, the RC oscillator of the on-board SoC (nRF52811/nRF52832) and the like can be used. Note that the frequency deviation when using the built-in RC oscillator is ± 2%, and periodic calibration is required to ensure the frequency deviation of ± 250 ppm. Products: Bluetooth® low energy Modules
In the FSK mode, when continuously transmitting the modulated wave using RF_TEST_MODE, the center frequency shifts by about 3 KHz.
As described in the data sheet, when using RF_TEST_MODE in FSK mode, the modulator reads unnecessary data before the generation of the expected test data just after TX_ON is started up. Therefore, the center frequency changes. To use RF_TEST_MODE correctly, check again through the following procedure. 1. Initialization register setting 2. Execute VCO_CAL 3. TX_ON 4. After starting up TX, MODEM reset * Note: Usually, this event does not occur when transmitting packets containing DIO control. So, it is not required to perform a MODEM reset after TX_ON. This is also an event specific to FSK mode. There is no problem in GFSK mode. Related Products: ML7344/ML7406 family, ML7345 family, ML7404, ML7414
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