Txij li thaum cov kev taw qhia ntawm onboard computers nyob rau hauv lub tsheb tsim nyob rau hauv lub lig 1970s thiab thaum ntxov 1980s, DIYers tau pom nws nyuaj ua hauj lwm rau lawv lub tsheb. Txawm li cas los xij, lub nti hu ua ELM327 microcontroller siv nrog rau ELM327 ntaus ntawv hloov qhov ntawd.
History of Automobile Scan Tools
Txog thaum nruab nrab-1990s, txhua lub tuam txhab tsheb muaj nws tus kheej cov qauv thiab cov txheej txheem, ua rau nws nyuaj txawm tias cov kws tshaj lij los khaws cov tab ntawm txhua tus qauv. Qhov ntawd tau hloov nrog kev taw qhia ntawm Onboard Diagnostics II (OBD-II), tus qauv siv los ntawm cov kws tsim tsheb thoob ntiaj teb.
Txawm tias muaj kev vam meej, cov cuab yeej luam theej ua haujlwm tuaj yeem raug nqi ntau txhiab daus las, muab lawv tawm ntawm ntau yam rau feem ntau DIY mechanics. Txog rau ob peb xyoos dhau los, txawm tias cov lej yooj yim thiab cov neeg nyeem cov ntaub ntawv raug nqi ntau pua daus las. Cov khoom siv yooj yim tuaj yeem nyeem thiab paub meej cov lej, tab sis lawv feem ntau tsis muab kev nkag mus rau Parameter IDs (PIDs) uas feem ntau tseem ceeb heev rau kev kuaj xyuas cov teeb meem tsav tsheb thiab lwm yam teeb meem.
The ELM327 programmed microcontroller yog ib qho me me, tus nqi qis uas txuas rau qhov sib txawv. Cov cuab yeej siv no microcontroller, xws li Yongtek ELM327 Bluetooth scanner, tsis txhob sib piv nrog cov cuab yeej scan. Tseem, lawv muab ntau cov ntaub ntawv tso rau hauv tes ntawm DIYers.
How the ELM327 Works
Lub ELM327 microcontroller ua haujlwm ua tus choj ntawm lub khoos phis tawj onboard hauv lub tsheb thiab lub PC lossis khoom siv tes. ELM327 tuaj yeem sib txuas lus nrog OBD-II qhov system thiab xa cov ntaub ntawv los ntawm USB, Wi-Fi, lossis Bluetooth txuas, nyob ntawm kev siv.
ELM327 txhawb nqa ntau lub koom haum ntawm Automotive Engineers (SAE) thiab International Organization for Standardization (ISO) raws tu qauv. Cov khoom siv ELM327 raug cai tuaj yeem sib txuas lus nrog txhua lub tsheb OBD-II. Cov lus txib siv los ntawm ELM327 tsis zoo ib yam rau Hayes cov lus txib, tab sis cov lus txib no zoo ib yam.
Kuv Yuav Ua Li Cas Nrog ELM327?
Koj tuaj yeem siv lub cuab yeej ELM327 txhawm rau kuaj xyuas koj lub tsheb lossis tsheb, tab sis feem ntau koj xav tau qee yam khoom siv thiab software ntxiv. ELM327 cov khoom siv tuaj yeem txuas nrog khoos phis tawj, smartphones, ntsiav tshuaj, thiab lwm yam khoom siv siv ntau txoj kev. Peb txoj hauv kev tseem ceeb suav nrog kev sib txuas nrog USB, kev sib txuas wireless Wi-nkaus, thiab Bluetooth.
Wired USB txuas:
- Kev xaiv ntau tshaj plaws.
- Tus nqi pheej yig vim tsis muaj xov tooj cua wireless.
- Tsis muaj caij nyoog ntawm kev sib txuas.
- Txoj kab tuaj yeem nkag mus.
Wireless Wi-Fi kev sib txuas:
- Compatible nrog ntau yam khoom siv dua li Bluetooth.
- Nyiaj.
Bluetooth:
- kuj pheej yig.
- Muaj nyob ntawm ntau yam khoom siv.
- Incompatible nrog qee cov khoom siv, zoo li iPhones.
Yog tias koj muaj PC lossis Android ntaus ntawv, ib qho ntawm cov txheej txheem no feem ntau yuav ua haujlwm. Yog tias koj muaj iPhone lossis iPad, tej zaum koj yuav tsis tuaj yeem siv Bluetooth ELM327 ntaus ntawv nrog nws vim tias iOS ua haujlwm li cas Bluetooth pawg.
ELM327 tuaj yeem muab rau koj nkag mus rau cov lej teeb meem thiab tseem tso saib PIDs. Txij li thaum kev sib txuas lus yog bidirectional, ELM327 kuj tso cai rau koj kom tshem tau cov lej tom qab koj kho qhov teeb meem. Cov kev ua tiav uas koj tuaj yeem ua tau yog nyob ntawm ELM327 ntaus ntawv thiab software koj siv. Koj kuj tseem tuaj yeem saib cov saib xyuas kev npaj thiab lwm yam ntaub ntawv.
Ntawm Clones thiab Pirates
Ntau tus clones thiab pirates nyob hauv khw, thiab qee qhov ua haujlwm zoo dua lwm tus. Thawj version ntawm ELM327 microcontroller code tsis luam tawm los ntawm Elm Electronics, ua rau nws raug pirated. Qee cov khoom siv uas siv cov cai qub tau hloov kho kom siv cov qauv tam sim no, thiab lwm tus tshaj tawm cov ntawv tshiab uas tseem tsis tau muaj.
Qee pirated clones ruaj khov, thiab lwm tus yog buggy. Txawm li cas los xij, cov clones ruaj khov tsis muaj kev ua haujlwm ntxiv nyob rau hauv cov qauv tshiab ntawm ELM327 code raug cai.
Scanning Alternatives to ELM 327
Yog tias koj xav siv lub cuab yeej scan ib leeg, muaj kev xaiv ntau yam ntawm tus nqi:
- Code nyeem: Tus nyeem ntawv lub tsheb tuaj yeem nyeem thiab tshem cov lej nkaus xwb.
- Scan tools: Cov cuab yeej luam theej duab yooj yim muab kev nkag mus rau cov lej thiab PIDs. Cov chav nyob qib siab suav nrog cov ntaub ntawv daws teeb meem.
- OBD-I scan cov cuab yeej: Tsim nyog rau cov tsheb tsim ua ntej 1996. Qee cov cuab yeej OBD-I scan ua haujlwm nrog tsuas yog ib lub tsheb xwb, thiab lwm yam suav nrog cov khoom siv rau kev siv nrog ntau lub tsheb.
Cov khoom siv uas siv ELM327 microcontroller feem ntau yog qhov yooj yim tshaj plaws thiab muaj txiaj ntsig zoo tshaj plaws los luam theej duab rau cov lej thiab saib PIDs. Txawm li cas los xij, muaj cov xwm txheej uas ib qho ntawm cov kev xaiv yuav ua haujlwm zoo dua li lwm qhov. Piv txwv li, ELM327 tsuas yog ua haujlwm nrog OBD-II, yog li ELM327 scan tool yuav tsis ua qhov zoo yog tias koj lub tsheb tau tsim ua ntej xyoo 1996. Tshwj tsis yog tias koj yog ib tus kws kho tsheb, lub tshuab ELM327 yuav ua haujlwm zoo nyob rau hauv feem ntau lwm yam xwm txheej.
