UART yog dab tsi?
UART stands rau Universal Asynchronous Receiver/Transmitter. Nws yog ib qho kev sib txuas lus sib txuas / raws tu qauv zoo li SPI thiab I2C, nws tuaj yeem yog lub cev hluav taws xob hauv microcontroller, lossis ib leeg IC. UART lub hom phiaj tseem ceeb yog xa thiab tau txais cov ntaub ntawv serial. Ib qho zoo tshaj plaws txog UART Bluetooth modules yog tias nws tsuas yog siv ob lub xov hlau los xa cov ntaub ntawv ntawm cov khoom siv.
UARTs xa cov ntaub ntawv asynchronously, uas txhais tau hais tias tsis muaj lub moos teeb liab los synchronize cov zis ntawm cov khoom los ntawm kev xa UART mus rau cov qauv ntawm cov khoom los ntawm qhov tau txais UART. Hloov chaw ntawm lub moos teeb liab, kev xa xov UART ntxiv pib thiab nres cov khoom rau cov ntaub ntawv pob khoom raug xa mus. Cov khoom no txhais qhov pib thiab qhov kawg ntawm pob ntawv cov ntaub ntawv kom cov tau txais UART paub thaum pib nyeem cov khoom.
Thaum qhov tau txais UART pom qhov pib me ntsis, nws pib nyeem cov khoom tuaj ntawm qhov tshwj xeeb zaus hu ua baud tus nqi. Baud tus nqi yog qhov ntsuas ntawm qhov ceev ntawm cov ntaub ntawv hloov chaw, qhia hauv cov khoom ib ob (bps). Ob leeg UARTs yuav tsum ua haujlwm ntawm tib tus nqi baud. Tus nqi baud ntawm kev xa thiab tau txais UARTs tuaj yeem sib txawv li ntawm ± 5% ua ntej lub sijhawm ntawm cov khoom tau dhau mus.
dab tsi pins nyob hauv UART?
VCC: Fais fab mov tus pin, feem ntau 3.3v
GND: PIB
RX: Txais cov ntaub ntawv tus pin
TX: Transmit data pin
Tam sim no, HCI nrov tshaj plaws yog UART thiab USB kev sib txuas, UART feem ntau nrov dua vim tias nws qhov kev ua tau zoo thiab cov ntaub ntawv dhau los ntawm qib sib piv rau USB interfaces, thiab cov txheej txheem sib kis tau yooj yim, uas txo cov software nyiaj siv ua haujlwm thiab yog tus nqi ntau dua. tag nrho kho vajtse daws teeb meem.
UART interface tuaj yeem ua haujlwm nrog cov khoom tawm ntawm lub txee Bluetooth module.
Tag nrho Feasycom's Bluetooth modules txhawb UART interface los ntawm lub neej ntawd. Peb kuj muab TTL serial chaw nres nkoj board rau UART kev sib txuas lus. Nws yooj yim heev thiab yooj yim rau cov neeg tsim khoom los sim lawv cov khoom.
Rau UART kev sib txuas lus Bluetooth modules cov ntsiab lus, koj tuaj yeem tiv tauj nrog Feasycom pab pawg muag khoom ncaj qha.
