Kev Ntsuas Kub Siv LM75BIMM thiab Raspberry Pi: 4 Cov Kauj Ruam

2024 Tus sau: John Day | [email protected]. Kawg hloov kho: 2024-01-30 09:26

LM75BIMM yog lub ntsuas kub digital suav nrog lub ntsuas cua sov thiab muaj ob lub xov hlau sib txuas uas txhawb nqa nws txoj haujlwm mus txog 400 kHz. Nws muaj qhov ntsuas kub ntau dhau nrog qhov txwv tsis pub siv tau thiab hystersis.

Hauv qhov kev qhia no kev cuam tshuam ntawm LM75BIMM sensor module nrog raspberry pi tau pom thiab nws cov phiaj xwm siv Java lus kuj tseem tau piav qhia. Txhawm rau nyeem qhov ntsuas kub, peb tau siv raspberry pi nrog I2C adapter Qhov no I2C adapter ua rau kev txuas mus rau lub ntsuas qhov ntsuas tau yooj yim thiab ntseeg tau ntau dua.

Kauj Ruam 1: Yuav Tsum Kho Vajtse:

Cov ntaub ntawv uas peb xav tau kom ua tiav peb lub hom phiaj suav nrog cov khoom siv hauv qab no:

1. LM75BIMM

2. Raspberry Pi

3. I2C Cable

4. I2C Shield rau raspberry pi

5. Ethernet cable

Kauj ruam 2: Khoos phis tawj sib txuas:

Tshooj khoos phis tawj sib txuas ntu piav qhia qhov txuas txuas uas xav tau ntawm lub ntsuas cua thiab raspberry pi. Ua kom muaj kev sib txuas raug yog qhov tseem ceeb xav tau thaum ua haujlwm ntawm ib qho system rau qhov xav tau cov zis. Yog li, qhov xav tau kev sib txuas yog raws li hauv qab no:

LM75BIMM yuav ua haujlwm dhau I2C. Nov yog qhov piv txwv kab hluav taws xob daim duab, qhia txog yuav ua li cas xaim txhua lub interface ntawm lub sensor.

Tawm-ntawm-lub thawv, lub rooj tsavxwm tau teeb tsa rau I2C interface, zoo li peb pom zoo siv qhov kev sib txuas no yog tias koj tsis ntseeg lwm yam.

Txhua yam koj xav tau yog plaub lub xov hlau! Tsuas yog plaub qhov kev sib txuas xav tau Vcc, Gnd, SCL thiab SDA tus pin thiab cov no txuas nrog kev pab ntawm I2C cable.

Cov kev sib txuas no tau qhia hauv cov duab saum toj no.

Kauj Ruam 3: Txoj Cai Rau Kev Ntsuas Kub:

Qhov zoo ntawm kev siv raspberry pi yog, uas yog muab rau koj qhov kev hloov pauv ntawm cov lus programming uas koj xav tau los teeb tsa lub rooj tsav xwm txhawm rau txhawm rau cuam tshuam lub sensor nrog nws. Kev siv cov txiaj ntsig zoo ntawm pawg thawj coj no, peb tab tom qhia ntawm no nws txoj haujlwm hauv Java. Tus lej java rau LM75BIMM tuaj yeem rub tawm los ntawm peb lub zej zog github uas yog Tswj Txhua Lub Zej Zog.

Ntxiv rau qhov yooj yim ntawm cov neeg siv, peb tab tom piav qhia cov cai ntawm no thiab:

Raws li thawj kauj ruam ntawm kev sau koj yuav tsum rub lub pi4j lub tsev qiv ntawv hauv java, vim tias lub tsev qiv ntawv no txhawb nqa cov haujlwm siv hauv txoj cai. Yog li, txhawm rau rub lub tsev qiv ntawv koj tuaj yeem mus ntsib qhov txuas hauv qab no:

pi4j.com/install.html

Koj tuaj yeem luam qhov ua haujlwm java code rau lub ntsuas no los ntawm no kuj:

ntshuam com.pi4j.io.i2c. I2CBus;

ntshuam com.pi4j.io.i2c. I2CDevice;

ntshuam com.pi4j.io.i2c. I2CFactory;

ntshuam java.io. IOException;

pej xeem chav kawm LM75BIMM

{

pej xeem zoo li qub tsis muaj dab tsi tseem ceeb (Txoj hlua args ) cuam tshuam zam

{

// Tsim I2C npav

I2CBus Bus = I2CFactory.getInstance (I2CBus. BUS_1);

// Tau txais I2C ntaus ntawv, LM75BIMM I2C chaw nyob yog 0x49 (73)

I2CDevice ntaus ntawv = Bus.getDevice (0x49);

// Xaiv cov npe sau npe

// Kev hloov pauv mus tas li, kev ua haujlwm ib txwm muaj

ntaus ntawv.write (0x01, (byte) 0x00);

Xov.sleep (500);

// Nyeem 2 bytes ntawm cov ntaub ntawv los ntawm chaw nyob 0x00 (0)

// temp msb, kub lsb

byte cov ntaub ntawv = tshiab byte [2];

device.read (0x00, cov ntaub ntawv, 0, 2);

// Hloov cov ntaub ntawv mus rau 9-ntsis

int temp = ((cov ntaub ntawv [0] & 0xFF) * 256 + (cov ntaub ntawv [1] & 0x80)) / 128;

yog (temp> 255)

{

temp -= 512;

}

ob cTemp = temp * 0.5;

ob fTemp = cTemp * 1.8 + 32;

// Cov ntaub ntawv tso tawm rau lub vijtsam

System.out.printf ("Kub hauv Celsisus: %.2f C %n", cTemp);

System.out.printf ("Kub hauv Fahrenheit: %.2f F %n", fTemp);

}

}

Lub tsev qiv ntawv uas txhawb nqa i2c kev sib txuas lus ntawm lub sensor thiab pawg thawj coj yog pi4j, nws ntau pob khoom I2CBus, I2CDevice thiab I2CFactory pab tsim kom muaj kev sib txuas.

ntshuam com.pi4j.io.i2c. I2CBus;

ntshuam com.pi4j.io.i2c. I2CDevice;

ntshuam com.pi4j.io.i2c. I2CFactory;

ntshuam java.io. IOException;

sau () thiab nyeem () lub luag haujlwm tau siv los sau qee cov lus txib tshwj xeeb rau lub ntsuas cua kom nws ua haujlwm hauv ib qho tshwj xeeb thiab nyeem cov ntawv tso tawm feem.

Qhov tso tawm ntawm lub sensor kuj tseem muaj nyob hauv daim duab saum toj no.

Kauj Ruam 4: Cov ntawv thov:

LM75BIMM yog qhov zoo rau ntau daim ntawv thov suav nrog cov chaw pib, cov cuab yeej ntsuas hluav taws xob, chaw ua haujlwm hluav taws xob, khoos phis tawj ntiag tug lossis lwm yam txheej txheem uas ntsuas ntsuas kub yog qhov tseem ceeb rau kev ua haujlwm. Yog li ntawd, lub ntsuas cua no muaj lub luag haujlwm tseem ceeb hauv ntau lub tshuab ntsuas kub.