1. Bluetooth module Serial tashar jiragen ruwa
Serial interface an taƙaita shi azaman tashar tashar jiragen ruwa, wanda kuma aka sani da tsarin sadarwa na serial, wanda aka fi sani da tashar tashar COM. Wannan kalma ce ta gaba ɗaya, kuma musaya masu amfani da hanyoyin sadarwa ana kiran su serial ports. Tashar tashar jiragen ruwa ta serial ita ce keɓancewar kayan aiki.
UART shine gajartawar Mai karɓa/mai aikawa da Asynchronous Universal Asynchronous, ma'ana Universal Asynchronous Receiver/ Transmitter.
UART ya haɗa da tashar tashar tashar TTL matakin da tashar tashar RS-232, kuma duka na'urorin da ke amfani da sadarwar UART suna buƙatar bin ka'idar UART.
2. Bluetooth module UART yarjejeniya
Dangane da nau'ikan ka'idoji daban-daban, ana iya ƙara raba shi zuwa nau'ikan ladabi guda biyu: H4 (TX/RX/CTS/RTS/GND) da H5 (TX/RX/GND)
H4: Sadarwa ba ta haɗa da sake watsawa ba, don haka dole ne CTS/RTS suyi amfani da shi. Sadarwar UART tana cikin yanayin "watsawa mai bayyanawa", wato, bayanan da ake saka idanu ta hanyar mai nazari na Logic shine ainihin bayanan sadarwa Jagoran Jagoran DataType Mai watsa shiri -> Mai kula da 0x01 HCI Command Mai watsa shiri -> Mai Gudanar da 0x02 ACL Mai watsa shiri -> Mai kula da 0x03 SCO Packet Controller -> Mai watsa shiri 0x04 HCI Mai Gudanar da Taron -> Mai watsa shiri 0x02 ACL Mai Kula da Fakitin -> Mai watsa shiri 0x03 SCO Fakitin
H5: (kuma aka sani da 3-waya), saboda goyan bayan sake aikawa, CTS/RTS na zaɓi ne. Fakitin bayanan sadarwa na H5 suna farawa da ƙarewa tare da 0xC0, wato, 0xC0... payload 0xC0. Idan kaya ya ƙunshi 0xC0, an canza shi zuwa 0xDB 0xDC; Idan kaya ya ƙunshi 0xDB, an canza shi zuwa 0xDB 0xDD
3. Bluetooth module serial port
Yawancin nau'ikan HCI na Bluetooth suna goyan bayan yanayin H5,
Ƙananan yanki (kamar BW101/BW104/BW151) yana goyan bayan yanayin H4 kawai (watau CTS/RTS ana buƙatar)
Ko H4 ko H5, yayin ƙaddamar da Bluetooth, tarin ka'idar yana haɗawa da tsarin a ƙimar baud na 115200bps. Bayan haɗin ya yi nasara, yana tsalle zuwa babban ƙimar baud (> = 921600bps). Yawanci ana amfani da su shine 921600/1M/1.5M/2M/3M
Lura: Tsarin tashar tashar jiragen ruwa na H4 ba ya haɗa da bitar rajistan; H5 yawanci yana amfani da ko da dubawa. Tuna saita tsarin lokacin ɗaukar fakitin bayanan tashar jiragen ruwa tare da mai nazarin Logic.
4. Magana
Basic sigogi
FSC-DB004-BT826 ya haɗu da BT826 Bluetooth module da DB004 fil dubawa allon, yana goyan bayan Bluetooth 4.2 dual mode protocol (BR/EDR/LE), haɗa baseband mai sarrafa, Cortex-M3 CPU, PCB eriya
- · Protocol: SPP, HID, GATT, da dai sauransu
- Girman Kunshin: 13 * 26.9 * 2mm
- · Matsayin wutar lantarki 1.5
- Matsakaicin adadin baud na tashar tashar tashar jiragen ruwa ta asali: 115.2kbps kewayon ƙimar Baud: 1200bps ~ 921kbps
- Taimakawa haɓaka OTA
- · BQB, MFI
- · Mai yarda da ƙayyadaddun ROHS
5. Summary
Serial sadarwa na Bluetooth abu ne mai sauqi kuma ilimi na asali. Gabaɗaya, lokacin yin kuskure, karanta ƙayyadaddun tsarin a hankali, kuma kula da wasu al'amura yayin amfani da mai nazarin dabaru. Idan baku fahimci wani abu ba, zaku iya tuntuɓar ƙungiyar Feasycom!
