Kev Ntsuas Kub Siv MCP9808 thiab Particle Photon: 4 Kauj Ruam

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

MCP9808 yog qhov ntsuas qhov ntsuas qhov ntsuas qhov tseeb ntau ± 0.5 ° C I2C mini module. Lawv tau suav nrog cov npe siv tau-programmable uas pab txhawb kev thov ntsuas kub. MCP9808 qhov ntsuas qhov ntsuas qhov ntsuas kub tau dhau los ua tus qauv kev lag luam raws li daim ntawv foos thiab kev txawj ntse, muab kev ntsuas ntsuas, ntsuas qhov ntsuas qhov ntsuas hauv digital, hom I2C.

Hauv qhov kev qhia no kev cuam tshuam ntawm MCP9808 sensor module nrog cov duab photon tau pom. 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. MCP9808

2. Particle Photon

3. I2C Cable

4. I2C Shield rau particle photon

Kauj ruam 2: Khoos phis tawj sib txuas:

Tshooj khoos phis tawj sib txuas qhov tseeb piav qhia qhov txuas txuas uas xav tau ntawm lub sensor thiab cov khoom siv photon. 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:

MCP9808 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:

Cia peb pib nrog cov lej me me tam sim no.

Thaum siv lub ntsuas qhov ntsuas nrog arduino, peb suav nrog application.h thiab lub tsev qiv ntawv spark_wiring_i2c.h. "application.h" thiab lub tsev qiv ntawv spark_wiring_i2c.h muaj cov haujlwm uas pab txhawb kev sib txuas lus i2c ntawm lub sensor thiab cov khoom me me.

Tag nrho cov cai hauv qab no tau muab rau hauv qab no kom yooj yim ntawm tus neeg siv:

#suav nrog

#suav nrog

// MCP9808 I2C chaw nyob yog 0x18 (24)

#define Ntxiv 0x18

ntab cTemp = 0, fTemp = 0;

void teeb tsa ()

{

// Teem sib txawv

Particle.variable ("i2cdevice", "MCP9808");

Particle.variable ("cTemp", cTemp);

// Pib I2C kev sib txuas lus li MASTER

Hlau.begin ();

// Initialise Serial Communication, teeb baud tus nqi = 9600

Serial.begin (9600);

// Pib I2C Kev Kis

Wire.beginTransmission (Addr);

// Xaiv cov npe sau npe

Hlau.write (0x01);

// Kev hloov pauv mus tas li, Lub hwj chim ua ntej

Hlau.write (0x00);

Hlau.write (0x00);

// Nres I2C Kev Kis

Wire.endTransmission ();

// Pib I2C Kev Kis

Wire.beginTransmission (Addr);

// Xaiv qhov kev daws teeb meem rgister

Hlau.write (0x08);

// Kev daws teeb meem = +0.0625 / C.

Hlau.write (0x03);

// Nres I2C Kev Kis

Wire.endTransmission ();

ncua (300);

}

void lub voj ()

{

unsigned int cov ntaub ntawv [2];

// Pib I2C kev sib txuas lus

Wire.beginTransmission (Addr);

// Xaiv cov ntaub ntawv sau npe

Hlau.write (0x05);

// Nres I2C kev xa mus

Wire.endTransmission ();

// Thov 2 bytes ntawm cov ntaub ntawv

Wire.requestFrom (Addr, 2);

// Nyeem 2 bytes ntawm cov ntaub ntawv

// temp msb, kub lsb

yog (Wire.available () == 2)

{

cov ntaub ntawv [0] = Wire.read ();

cov ntaub ntawv [1] = Wire.read ();

}

ncua (300);

// Hloov cov ntaub ntawv mus rau 13-ntsis

int temp = ((cov ntaub ntawv [0] & 0x1F) * 256 + cov ntaub ntawv [1]);

yog (temp> 4095)

{

temp -= 8192;

}

cTemp = temp * 0.0625;

fTemp = cTemp * 1.8 + 32;

// Tso tawm cov ntaub ntawv rau dashboard

Particle.publish ("Kub hauv Celsius:", String (cTemp));

Particle.publish ("Kub hauv Fahrenheit:", String (fTemp));

ncua (500);

}

Particle.variable () muaj nuj nqi tsim cov kev hloov pauv kom khaws cov zis tawm ntawm lub sensor thiab Particle.publish () muaj nuj nqi qhia cov zis ntawm lub dashboard ntawm lub xaib.

Cov zis sensor tau pom hauv daim duab saum toj no rau koj siv.

Kauj Ruam 4: Cov ntawv thov:

MCP9808 Digital Kub Sensor muaj ntau daim ntawv thov kev lag luam uas suav nrog cov tub yees txias thiab tub yees nrog rau ntau yam txheej txheem khoom noj. Qhov ntsuas no tuaj yeem ua haujlwm rau ntau lub khoos phis tawj ntiag tug, servers nrog rau lwm yam khoom siv hauv PC.