Raspberry Pi Tham Nrog ESP8266 Siv MQTT: 8 Kauj Ruam

2024 Tus sau: John Day | [email protected]. Kawg hloov kho: 2024-01-30 09:29

Hauv qhov haujlwm no, kuv yuav piav qhia tias MQTT raws tu qauv yog li cas thiab nws siv los sib txuas lus ntawm cov cuab yeej li cas, Tom qab ntawd, raws li qhov ua piv txwv, kuv yuav ua kom pom kev teeb tsa tus neeg siv khoom thiab cov txheej txheem brocker, qhov twg ESP8266 module nrog rau RPi tham rau ib leeg lossis xa xov thaum lub pob raug thawb.

Cov khoom siv xav tau

1. Raspberry Pi 3

2. NodeMCU

3. LED

4. Khawm

5. Resistors (10k, 475 ohm)

Kauj Ruam 1: MQTT Yog Dab Tsi thiab Nws Ua Haujlwm Li Cas

MQTT

MQTT yog lub tshuab-rau-tshuab (M2M) cov ntaub ntawv hloov chaw raws tu qauv. MQTT tau tsim nrog lub hom phiaj ntawm kev khaws cov ntaub ntawv los ntawm ntau lub cuab yeej thiab tom qab ntawd thauj cov ntaub ntawv ntawd mus rau IT kev tsim vaj tsev. Nws yog lub teeb yuag, thiab yog li ntawd zoo tshaj rau kev saib xyuas tej thaj chaw deb, tshwj xeeb tshaj yog hauv M2M kev sib txuas uas xav tau tus lej me me hneev taw lossis qhov twg bandwidth hauv network txwv.

Yuav ua li cas MQTT ua haujlwm

MQTT yog kev tshaj tawm/sau npe txheej txheem uas tso cai rau ntug-ntawm-cov cuab yeej siv network tshaj tawm rau tus tswv lag luam. Cov neeg siv khoom txuas rau tus broker no, uas tom qab ntawd ua kom muaj kev sib txuas lus nruab nrab ntawm ob lub cuab yeej. Txhua lub cuab yeej tuaj yeem sau npe, lossis sau npe, rau cov ncauj lus tshwj xeeb. Thaum lwm tus neeg siv tshaj tawm cov lus ntawm cov ncauj lus uas tau sau npe, tus tswv lag luam xa cov lus mus rau txhua tus neeg siv khoom uas tau sau npe.

MQTT yog ob txoj hauv kev, thiab tswj hwm kev paub txog kev sib tham hauv xeev. Yog tias cov cuab yeej txuas-ntawm-network poob kev sib txuas, txhua tus neeg tau txais kev tso npe yuav raug ceeb toom nrog "Qhov Yuav Tseeb thiab Lus Nug" qhov tshwj xeeb ntawm MQTT server kom txhua tus neeg tau txais kev tso cai hauv qhov system tuaj yeem tshaj tawm tus nqi tshiab rov qab mus rau ntug-ntawm- cov cuab yeej network, tswj kev sib txuas ob tog.

Txoj haujlwm tau muab faib ua 3 ntu

Ua ntej tshaj, peb tsim MQTT server ntawm RPi thiab teeb tsa qee lub tsev qiv ntawv.

Qhov thib ob, peb yuav teeb tsa cov tsev qiv ntawv hauv Arduino IDE rau NodeMCU kom ua haujlwm nrog MQTT, upload cov cai thiab tshawb xyuas seb server puas ua haujlwm lossis tsis yog.

Thaum kawg, peb tsim tsab ntawv hauv Rpi, xa cov cai uas xav tau hauv NodeMCU thiab khiav cov ntawv nab nab los tswj leds los ntawm ob tus neeg rau zaub mov thiab cov neeg siv khoom. Ntawm no, server yog RPi thiab tus thov yog NodeMCU.

Kauj ruam 2: Raspberry Pi

1. Txhawm rau teeb tsa qhov tseeb MQTT server thiab cov neeg siv khoom hauv RPi, txhawm rau siv lub chaw cia khoom tshiab koj yuav tsum xub xub xa cov pob khoom ntim kos npe.

wget https://repo.mosquitto.org/debian/mosquitto-repo.gpg.keysudo apt-key ntxiv mosquitto-repo.gpg.key

2. Ua kom lub chaw cia khoom muaj rau apt.

cd /etc/apt/sources.list.d/

3. Nyob ntawm seb koj siv Debian version twg.

sudo wget https://repo.mosquitto.org/debian/mosquitto-wheezy.listsudo wget

sudo wget

sudo apt-tau hloov tshiab

4. Nruab Mosquitto server siv cov lus txib.

sudo apt-tau nruab mosquitto

Yog tias koj tau txais qhov yuam kev hauv kev txhim kho Mosquitto zoo li no.

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Cov pob hauv qab no muaj qhov tsis txaus ntseeg nyob rau hauv: mosquitto: Nyob ntawm: libssl1.0.0 (> = 1.0.1) tab sis nws tsis tuaj yeem teeb tsa tau nyob ntawm: libwebsockets3 (> = 1.2) tab sis nws tsis tuaj yeem teeb tsa E: Tsis tuaj yeem kho qhov teeb meem, koj tau tuav tawg pob khoom

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Tom qab ntawd siv cov lus txib no los kho cov teeb meem.

sudo apt -fix-tawg nruab

5. Tom qab teeb tsa MQTT server, teeb tsa tus neeg siv siv cov lus txib

sudo apt-tau nruab mosquitto-cov neeg siv khoom

Koj tuaj yeem tshawb xyuas cov kev pabcuam siv cov lus txib.

systemctl xwm txheej mosquitto.service

Raws li peb MQTT server thiab cov neeg siv khoom tau teeb tsa. Tam sim no, peb tuaj yeem tshawb xyuas nws siv kev sau npe thiab tshaj tawm. Txog rau npe thiab tshaj tawm koj tuaj yeem tshawb xyuas cov lus txib lossis mus saib lub vev xaib raws li tau hais hauv qab no.

Mosquitto Sub

Mosquitto Pub

Txhawm rau teeb tsa tsev qiv ntawv paho-mqtt siv cov lus txib hauv qab no.

sudo pip nruab paho-mqtt

Paho

Kauj Ruam 3: Yuav Teeb Li Cas Qhov Chaw Nyob IP

Mus rau phau ntawv teev npe cd /lwm yam thiab qhib cov ntaub ntawv dhcpcd.conf siv ib tus kws kho mob. Thaum kawg, sau plaub kab no.

interface eth0 zoo li qub ip_address = 192.168.1.100 // ip koj xav siv

wb wl0

ip_address zoo li qub = 192.168.1.68

routers zoo li qub = 192.168.1.1 // koj lub rooj vag Default

zoo li qub domain_name_servers = 192.168.1.1

Tom qab ntawd txuag nws thiab rov pib dua koj tus pi.

Kauj Ruam 4: NodeMCU

Txhim kho cov tsev qiv ntawv xav tau hauv Arduino IDE rau NodeMCU

1. Mus rau Sketch ==> Suav nrog tsev qiv ntawv ==> Tswj cov tsev qiv ntawv.

2. Tshawb nrhiav mqtt thiab teeb tsa tsev qiv ntawv los ntawm Adafruit lossis koj tuaj yeem nruab ib lub tsev qiv ntawv.

3. Nws vam khom sleepydog lub tsev qiv ntawv yog li peb xav tau lub tsev qiv ntawv no ib yam.

Qhov kev zov me nyuam tau muab rau saum toj no, tsuas yog txhawm rau txheeb xyuas seb nws ua haujlwm lossis tsis. Ntawm no kuv tsis tau tsim ib tsab ntawv hauv RPi. Peb tsuas yog siv cov lus txib txhawm rau sau npe thiab tshaj tawm. Peb yuav tsim tsab ntawv rau kev tswj hwm tom qab.

mosquitto_pub -h raspberrypi -t "/leds/pi" -m "ON"

mosquitto_pub -h raspberrypi -t "/leds/pi" -m "OFF"

mosquitto_pub -h raspberrypi -t "/leds/pi" -m "TOGGLE"

mosquitto_pub -h raspberrypi -t "/leds/esp8266" -m "ON"

mosquitto_pub -h raspberrypi -t "/leds/esp8266" -m "OFF"

mosquitto_pub -h raspberrypi -t "/leds/esp8266" -m "TOGGLE"

-h ==> host name-t ==> ncauj lus

-m ==> lus

Tom qab txheeb xyuas Mqtt_check program upload tiav qhov program hauv NodeMCU

Kauj ruam 5: Python Script

Raws li kuv tau tham saum toj no peb xav tau tsab ntawv nab nab rau kev tswj cov leds siv cov nyees khawm. Yog li, peb tab tom yuav tsim tsab ntawv. Tsab ntawv tau muab rau saum toj no.

Thaum koj khiav cov ntawv koj tsab ntawv yuav tsum zoo li zoo li tau qhia hauv duab, yog tias cov lej tshwm sim tsis yog xoom ces lawv yog qhov yuam kev koj tuaj yeem tshawb xyuas qhov ua yuam kev ntawm paho lub vev xaib.

Kauj Ruam 6: Kev Sib Txuas thiab Daim Duab Duab

Kev cuam tshuam ntawm khawm, LED nrog NodeMCU

NodeMCU ===> ButtonGnd ===> Gnd

3.3V ===> PIN1

GPIO4 (D2) ===> PIN2

NodeMCU ===> LED

Gnd ===> Cathode (-ve)

GPIO5 (D1) ===> Anode (+ve)

Kev cuam tshuam ntawm khawm, LED nrog RPi

RPi ===> ButtonGnd ===> PIN1

GPIO 23 ===> PIN2

RPi ===> LED

Gnd ==> Cathode (-ve)

GPIO 24 ===> Anode (+ve)

Kauj Ruam 7: Qhov tshwm sim

Nco ntsoov tias koj tsab ntawv ua haujlwm tsis yog nws yuav tsis tuaj yeem tswj coj siv cov nyees khawm.