Raspberry Pi MCP9803 Kub Sensor Java Qhia: 4 Kauj Ruam

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

MCP9803 yog 2-xaim siab qhov ntsuas kub. Lawv tau suav nrog cov npe siv tau-programmable uas pab txhawb kev thov ntsuas kub. Qhov ntsuas no haum rau kev siv ntau qhov chaw ntsuas kub ntau. Nov yog qhov ua piv txwv nrog java code siv Raspberry Pi.

Kauj Ruam 1: Yam Koj Xav Tau..

1. Raspberry Pi

2. MCP9803

3. I²C Cable

4. I²C Shield rau Raspberry Pi

5. Ethernet Cable

Kauj ruam 2: Kev sib txuas

Siv I2C daim thaiv rau raspberry pi thiab maj mam thawb nws hla gpio pins ntawm raspberry pi.

Tom qab ntawd txuas ib qho kawg ntawm I2C cable rau MCP9803 sensor thiab lwm qhov kawg rau I2C daim ntaub thaiv.

Kuj txuas Ethernet cable rau pi lossis koj tuaj yeem siv WiFi module. Kev sib txuas tau qhia hauv daim duab saum toj no.

Kauj ruam 3: Code

Tus lej java rau MCP9803 tuaj yeem rub tawm los ntawm peb qhov chaw cia khoom github- Dcube Store

Nov yog qhov txuas rau tib yam:

github.com/DcubeTechVentures/MCP9803/blob/master/Java/MCP9803.java

Peb tau siv pi4j tsev qiv ntawv rau java code, cov kauj ruam rau nruab pi4j ntawm raspberry pi tau piav qhia ntawm no:

pi4j.com/install.html

Koj tseem tuaj yeem luam cov cai los ntawm no, nws tau muab raws li hauv qab no:

// Faib nrog daim ntawv tso cai yuav dawb.

// Siv nws txhua txoj hauv kev uas koj xav tau, muaj txiaj ntsig lossis pub dawb, muab nws haum rau hauv daim ntawv tso cai ntawm nws cov haujlwm ua haujlwm.

NPE MC9803

// Cov cai no tau tsim los ua haujlwm nrog MCP9808_I2CS I2C Mini Module

ntshuam com.pi4j.io.i2c. I2CBus;

ntshuam com.pi4j.io.i2c. I2CDevice;

ntshuam com.pi4j.io.i2c. I2CFactory;

ntshuam java.io. IOException;

pej xeem hauv chav kawm MCP9803

{

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, MCP9803 I2C chaw nyob yog 0x48 (72)

I2CDevice ntaus ntawv = Bus.getDevice (0x48);

// Xaiv cov npe sau npe

// Kev hloov pauv tas li, Lub zog hloov pauv, hom sib piv, 12-ntsis kev daws teeb meem

ntaus ntawv.write (0x01, (byte) 0x60);

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 12-ntsis

int temp = ((cov ntaub ntawv [0] & 0xFF) * 256 + (data [1] & 0xF0)) / 16;

yog (temp> 2047)

{

temp -= 4096;

}

ob cTemp = temp * 0.0625;

ob fTemp = cTemp * 1.8 + 32;

// Cov ntaub ntawv tso tawm rau lub vijtsam

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

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

}

}

Kauj ruam 4: Cov ntawv thov..:

MCP9803 tuaj yeem ua haujlwm hauv thaj chaw dav ntawm cov khoom siv uas suav nrog lub khoos phis tawj ntiag tug thiab lwm yam khoom siv, hard disk drive, ntau yam kev lom zem, kev ua haujlwm hauv chaw haujlwm thiab cov ntaub ntawv sib txuas lus. Qhov ntsuas no tuaj yeem suav nrog hauv ntau lub tshuab ntse.