1. Bluetooth module seri port
Mawonekedwe a serial amafupikitsidwa ngati doko la serial, lomwe limadziwikanso kuti serial communication interface, yomwe imadziwikanso kuti doko la COM. Ili ndi liwu wamba, ndipo zolumikizira zomwe zimagwiritsa ntchito kulumikizana kosalekeza zimatchedwa ma serial ports. A serial port ndi mawonekedwe a hardware.
UART ndiye chidule cha Universal Asynchronous Receiver/Transmitter, kutanthauza Universal Asynchronous Receiver/Transmitter.
UART imaphatikizapo doko lamtundu wa TTL ndi doko la RS-232, ndipo zida zonse zomwe zimagwiritsa ntchito kulumikizana kwa UART ziyenera kutsatira protocol ya UART.
2. Bluetooth module UART protocol
Malinga ndi mitundu yosiyanasiyana ya ma protocol, imatha kugawidwa m'mitundu iwiri: H4 (TX/RX/CTS/RTS/GND) ndi H5 (TX/RX/GND)
H4: Kuyankhulana sikumaphatikizapo kutumizanso, kotero CTS/RTS iyenera kugwiritsa ntchito. Kulankhulana kwa UART kuli mu "transparent transmission" mode, ndiye kuti, deta yomwe imayang'aniridwa kudzera mu Logic analyzer ndiyo njira yeniyeni yolumikizirana Direction Head DataType Host ->Controller 0x01 HCI Command Host ->Controller 0x02 ACL Packet Host ->Controller 0x03 SCO Packet Controller -> Host 0x04 HCI Chowongolera Chochitika -> Host 0x02 ACL Packet Controller ->Host 0x03 SCO Packet
H5: (yomwe imadziwikanso kuti 3-waya), chifukwa chothandizira kutumizanso, CTS/RTS ndiyosasankha. Mapaketi a data a H5 amayamba ndi kutha ndi 0xC0, ndiko kuti, 0xC0... payload 0xC0. Ngati malipiro ali ndi 0xC0, amasinthidwa kukhala 0xDB 0xDC; Ngati katunduyo ali ndi 0xDB, amasinthidwa kukhala 0xDB 0xDD
3. Bluetooth module serial port
Ma module ambiri a Bluetooth HCI amathandizira mawonekedwe a H5,
Gawo laling'ono (monga BW101/BW104/BW151) limangothandizira mawonekedwe a H4 (ie CTS/RTS ikufunika)
Kaya H4 kapena H5, poyambitsa Bluetooth, stack protocol imalumikizana ndi module pamlingo wa baud wa 115200bps. Kulumikizana kukapambana, kumadumphira pamlingo wapamwamba kwambiri (> = 921600bps). Nthawi zambiri amagwiritsidwa ntchito ndi 921600/1M/1.5M/2M/3M
Zindikirani: Kukonzekera kwa doko la H4 sikumaphatikizapo cheke; H5 nthawi zambiri amagwiritsa ntchito cheke. Kumbukirani kuyika mawonekedwe mukamagwira mapaketi amtundu wa serial port okhala ndi Logic analyzer.
4. Mlandu
Zomwe zimayambira
FSC-DB004-BT826 imaphatikiza BT826 Bluetooth gawo ndi DB004 pin interface board, imathandizira Bluetooth 4.2 dual mode protocol (BR/EDR/LE), imaphatikiza controller baseband, Cortex-M3 CPU, antenna ya PCB
- · Protocol: SPP, HID, GATT, etc
- Kukula kwa phukusi: 13 * 26.9 * 2mm
- · Mphamvu yamphamvu 1.5
- · Mlingo wa baud wokhazikika wa doko: 115.2kbps Baud mlingo: 1200bps~921kbps
- Thandizani kukweza kwa OTA
- · BQB, MFI
- · Zogwirizana ndi ROHS
5. Chidule
Kuyankhulana kwachinsinsi kwa Bluetooth ndikosavuta komanso chidziwitso chofunikira. Nthawi zambiri, mukakonza zolakwika, werengani mozama za gawoli, ndipo samalani ndi zinthu zina mukamagwiritsa ntchito Logic analyzer. Ngati simukumvetsetsa china chilichonse, mutha kulumikizana ndi gulu la Feasycom!
