라즈베리 파이 3부터 블루투스가 추가되었는데
비컨모드(advertise mode) 로 사용이 가능하면.. 페어링 없이 데이터를 주고 받을 수 있을 것 같아서 검색!
[링크 : http://scribles.net/running-ble-advertising-example-code-on-raspbian-stretch/]
| 간만에 라즈베리 + 포맷? (0) | 2020.11.29 |
|---|---|
| 라즈베리 파이 3B 환상이 너무 컸나? (0) | 2020.10.25 |
| rpi voip (0) | 2020.09.22 |
| 라즈베리 파이 자동차 전원 업그레이드? (0) | 2020.06.17 |
| 라즈베리 RC는 일단 구동에는 실패 (0) | 2020.06.10 |
bluetooth basic rate(BR)
bluetooth enhanced data rate (EDR)
bluetooth low energy (LE)
[링크 : http://smartits.tistory.com/m/16]
BR/EDR은 bt classic으로 LE는 다르게 정의 되는 듯.
| Bluetooth® Classic The Bluetooth Classic radio, also referred to as Bluetooth Basic Rate/Enhanced Data Rate (BR/EDR), is a low power radio that streams data over 79 channels in the 2.4GHz unlicensed industrial, scientific, and medical (ISM) frequency band. Supporting point-to-point device communication, Bluetooth Classic is mainly used to enable wireless audio streaming and has become the standard radio protocol behind wireless speakers, headphones, and in-car entertainment systems. The Bluetooth Classic radio also enables data transfer applications, including mobile printing. Bluetooth® LE The Bluetooth LE radio is designed for very low power operation. Transmitting data over 40 channels in the 2.4GHz unlicensed ISM frequency band, the Bluetooth LE radio provides developers a tremendous amount of flexibility to build products that meet the unique connectivity requirements of their market. Bluetooth LE supports multiple communication topologies, including point-to-point, broadcast and mesh. While initially known for its device communications capabilities, Bluetooth LE is now also widely used as a device positioning technology to address the increasing demand for high accuracy location services. Bluetooth LE now includes features that enable one device to determine the presence, distance, and direction of another device. |
[링크 : http://www.bluetooth.com/ko-kr/learn-about-bluetooth/bluetooth-technology/radio-versions/]
bluetooth / bluetooth smart ready / bluetooth smart 이건 bluetooth 4.0 부터 나온 개념이라고 한다.
bluetooth - bluetooth classic
bluetooth smart ready - bluetooth classic + BLE 지원
bluetooth smart - BLE only
[링크 : http://medium.com/@zoyi_product/bluetooth-low-energy-ble-84b03705ffca]
ble advertising packet
[링크 : http://blog.msalt.net/210]
| rs-422 (0) | 2021.06.03 |
|---|---|
| FTPS (0) | 2021.02.07 |
| UDP와 MTU? (0) | 2020.09.07 |
| proxy forward / reverse 차이 (0) | 2019.02.08 |
| TLS 암호화 (구, SSL) (0) | 2019.02.07 |
VS2019 에서 정상적으로 넣는법은 찾지 못했고
Image 클래스를 이용해 넣은 후 컴파일 하면 자동으로 Form1.resx 파일에 추가되긴 한다.
[링크 : https://www.dotnetperls.com/picturebox]
[링크 : https://stackoverflow.com/questions/19910172/how-to-make-picturebox-transparent]
+ 2020.10.13
winform .net core로 해서 그런걸까?
| .net core/.net framework 컨트롤 차이 (0) | 2020.10.13 |
|---|---|
| .net core와 .net framework 차이 - winform menustrip (0) | 2020.10.13 |
| c# strong type langugae (0) | 2020.10.08 |
| c# delagate 대리자 (0) | 2020.10.08 |
| c# out (0) | 2020.10.07 |
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