1. Bluetooth module Serial port
Sebopeho sa serial se khutsufatsoa e le kou ea serial, e tsejoang hape e le sebopeho sa puisano sa serial, ka kakaretso se tsejoang hape e le kou ea COM. Lena ke lentsoe le akaretsang, 'me li-interfaces tse sebelisang puisano ea serial li bitsoa serial ports. A serial port ke sebopeho sa hardware.
UART ke khutsufatso ea Universal Asynchronous Receiver/Transmitter, e bolelang Universal Asynchronous Receiver/Transmitter.
UART e kenyelletsa boema-kepe ba serial ba boemo ba TTL le boema-kepe ba serial ba boemo ba RS-232, 'me lisebelisoa ka bobeli tse sebelisang puisano ea UART li hloka ho latela protocol ea UART.
2. Bluetooth module UART protocol
Ho latela liforomo tse fapaneng tsa protocol, e ka aroloa hape ka liforomo tse peli tsa protocol: H4 (TX/RX/CTS/RTS/GND) le H5 (TX/RX/GND)
H4: Puisano ha e kenyeletse phetiso hape, kahoo CTS/RTS e tlameha ho sebelisa. Puisano ea UART e maemong a "transparent transmission", ke hore, data e shebiloeng ka Logic analyzer ke data ea sebele ea puisano Direction Head DataType Host -> Controller 0x01 HCI Command Host -> Controller 0x02 ACL Packet Host -> Controller 0x03 SCO Packet Controller -> Host 0x04 HCI Molaoli oa Ketsahalo -> Host 0x02 ACL Packet Controller -> Host 0x03 SCO Packet
H5: (e tsejoang hape e le 3-wire), ka lebaka la tšehetso bakeng sa phetiso, CTS/RTS ke boikhethelo. Lipakete tsa data tsa puisano tsa H5 li qala le ho fela ka 0xC0, ke hore, 0xC0... payload 0xC0. Haeba moputso o na le 0xC0, o fetoloa ho 0xDB 0xDC; Haeba mojaro o nang le 0xDB, o fetoleloa ho 0xDB 0xDD
3. Bluetooth module serial port
Boholo ba li-module tsa Bluetooth HCI li tšehetsa mokhoa oa H5,
Karolo e nyane (joalo ka BW101/BW104/BW151) e ts'ehetsa mokhoa oa H4 feela (ke hore, CTS/RTS ea hlokahala)
Ho sa tsotellehe hore na H4 kapa H5, nakong ea ho qala ha Bluetooth, "protocol stack" e hokahana le module ka sekhahla sa baud sa 115200bps. Kamora hore khokahano e atlehe, e tlolela ho sekhahla se phahameng sa baud (>=921600bps). Tse sebelisoang hangata ke 921600/1M/1.5M/2M/3M
Tlhokomeliso: Tlhophiso ea serial port ea H4 ha e kenyelle karolo ea ho hlahloba; H5 hangata e sebelisa esita le cheke. Hopola ho seta sebopeho ha u tšoara lipakete tsa data tsa serial port ka Logic analyzer.
4. Taba
Lintlha tsa motheo
FSC-DB004-BT826 e kopanya BT826 Bluetooth module le DB004 pin interface board, e tšehetsa Bluetooth 4.2 dual mode protocol (BR/EDR/LE), e kopanya baseband controller, Cortex-M3 CPU, PCB antenna
- · Protocol: SPP, HID, GATT, joalo-joalo
- · Boholo ba sephutheloana: 13 * 26.9 * 2mm
- ·Boemo ba matla 1.5
- Sekhahla sa maemo a kamehla sa serial port baud: 115.2kbps Baud rate range: 1200bps~921kbps
- ·Tsehetsa ntlafatso ea OTA
- ·BQB, MFI
- · E lumellana le litlhaloso tsa ROHS
5. Summary
Puisano ea seriale ea Bluetooth ke tsebo e bonolo haholo le ea mantlha. Ka kakaretso, ha u lokisa liphoso, bala litlhaloso tsa module ka hloko, 'me u ele hloko litaba tse ling ha u sebelisa Logic analyzer. Haeba u sa utloisise letho le leng, u ka ikopanya le sehlopha sa Feasycom!
