{"id":37407,"date":"2019-10-31T22:17:29","date_gmt":"2019-10-31T19:17:29","guid":{"rendered":"https:\/\/prohoster.info\/blog\/esp8266-upravlenie-cherez-internet-po-protokolu-mqtt\/"},"modified":"2019-10-31T22:17:29","modified_gmt":"2019-10-31T19:17:29","slug":"esp8266-upravlenie-cherez-internet-po-protokolu-mqtt","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sk\/blog\/administrirovanie\/esp8266-upravlenie-cherez-internet-po-protokolu-mqtt","title":{"rendered":"Esp8266 ovl\u00e1danie cez internet pod\u013ea protokolu MQTT","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

\"Esp8266
\n Ahojte v\u0161etci! V tomto \u010dl\u00e1nku podrobne pop\u00ed\u0161em a uk\u00e1\u017eem, ako si za 20 min\u00fat vo\u013en\u00e9ho \u010dasu nastavi\u0165 vzdialen\u00e9 ovl\u00e1danie modulu esp8266 pomocou aplik\u00e1cie na Android podle protokolu MQTT.<\/p>\n

My\u0161lienka vzdialen\u00e9ho ovl\u00e1dania a monitorovania v\u017edy fascinovala t\u00fdch, ktor\u00ed sa zaoberaj\u00fa elektronikou a programovan\u00edm. Mo\u017enos\u0165 v ktoromko\u013evek okamihu z\u00edska\u0165 alebo odosla\u0165 potrebn\u00e9 d\u00e1ta, nez\u00e1visle od svojho umiestnenia, pon\u00faka \u0161irok\u00e9 mo\u017enosti. V mojich predch\u00e1dzaj\u00facich \u010dl\u00e1nkoch ( \u010cl\u00e1nok 1<\/a><\/noindex> a \u010cl\u00e1nok 2<\/a><\/noindex>) som sa sna\u017eil presk\u00fama\u0165 nieko\u013eko dostupn\u00fdch a relat\u00edvne jednoduch\u00fdch variantov realiz\u00e1cie vzdialen\u00e9ho ovl\u00e1dania mikrokontrol\u00e9rmi cez internet. Av\u0161ak \u010das a cel\u00fd svet nestoj\u00ed na mieste \u2013 pokrok ne\u00faprosne postupuje vpred. Po\u010das tejto kr\u00e1tkej doby sa modul esp8266 stal ve\u013emi popul\u00e1rnym, preto\u017ee v\u010faka n\u00edzkej cene a integrovan\u00e9mu wi-fi sa stal jedn\u00fdm z hlavn\u00fdch komponentov \u201eInteligentn\u00e9ho domu\u201c.
\n<\/a><\/noindex>
\nV s\u00fa\u010dasnosti je MQTT najpokro\u010dilej\u0161\u00ed a najpopul\u00e1rnej\u0161\u00ed protokol na prenos d\u00e1t medzi jednotliv\u00fdmi zariadeniami v r\u00e1mci syst\u00e9mov \u201eInteligentn\u00e9ho domu\u201c. M\u00e1 nieko\u013eko v\u00fdhod oproti in\u00fdm protokolom:
\n \u2014 n\u00edzka spotreba d\u00e1t;
\n \u2014 spojenie medzi klientom a serverom je v\u017edy otvoren\u00e9;
\n \u2014 nesp\u00f4sobuje tlak na internetov\u00fd kan\u00e1l;
\n \u2014 absencia oneskoren\u00ed pri prenose d\u00e1t;
\n \u2014 pohodln\u00fd syst\u00e9m odberu t\u00e9m;
\n To v\u0161etko umo\u017e\u0148uje monitorovanie a ovl\u00e1danie v re\u00e1lnom \u010dase. Av\u0161ak MQTT vy\u017eaduje existenciu vlastn\u00e9ho servera, ktor\u00fd sl\u00fa\u017ei ako sprostredkovate\u013e medzi klientmi siete. Tu s\u00fa dve mo\u017enosti: bu\u010f vytvori\u0165 vlastn\u00fd server alebo vyu\u017ei\u0165 extern\u00e9 slu\u017eby.<\/p>\n

Op\u00edsan\u00fd syst\u00e9m riadenia pozost\u00e1va z dvoch hlavn\u00fdch \u010dast\u00ed: servera MQTT (zvy\u010dajne jedin\u00e9ho) a klientov, ktor\u00fdch m\u00f4\u017ee by\u0165 pomerne ve\u013ea. V na\u0161om pr\u00edpade bud\u00fa klientmi aplik\u00e1cia na Android a samotn\u00fd modul esp8266.<\/p>\n

Algoritmus pr\u00e1ce syst\u00e9mu je nasleduj\u00faci. Klienti sa pripoja k serveru a bezprostredne po pripojen\u00ed sa ka\u017ed\u00fd z nich prihl\u00e1si na zauj\u00edmav\u00e9 t\u00e9my. V\u0161etka komunik\u00e1cia medzi klientmi prebieha tranzitne cez server, ktor\u00fd smeruje d\u00e1ta in\u00fdm klientom s oh\u013eadom na ich odber.<\/p>\n

MQTT server. <\/b><\/p>\n

V na\u0161om pr\u00edpade pou\u017eijeme ve\u013emi pohodln\u00fa slu\u017ebu www.cloudmqtt.com<\/a><\/noindex> , ktor\u00e1 m\u00e1 bezplatn\u00fd tarif (Cute Cat), ktor\u00fd \u00faplne pokryje potreby na realiz\u00e1ciu malej vlastnej syst\u00e9mu \"inteligentn\u00e9ho domu\".
\n\"Esp8266
\n Zaregistrujeme sa na str\u00e1nke a z\u00edskame potrebn\u00e9 \u00fadaje na pr\u00edstup k serveru. Pri nastavovan\u00ed klientskej aplik\u00e1cie je potrebn\u00e9 pou\u017ei\u0165 be\u017en\u00fd port (bez SSL a TLS).
\n\"Esp8266
\n
\nAplik\u00e1cia pre Android.<\/b><\/p>\n

Na\u0161a aplik\u00e1cia bude sl\u00fa\u017ei\u0165 ako dia\u013ekov\u00e9 ovl\u00e1danie pre mikrokontrol\u00e9r a taktie\u017e bude prij\u00edma\u0165 a zobrazova\u0165 v\u0161etky z\u00edskan\u00e9 inform\u00e1cie z esp8266.<\/p>\n

Aplik\u00e1cia sa naz\u00fdva IoT MQTT Dashboard<\/a><\/noindex> a predstavuje kompletn\u00fd mqtt klient s mal\u00fdm po\u010dtom ve\u013emi pohodln\u00fdch widgetov. Podrobnej\u0161ie inform\u00e1cie o pr\u00e1ci s aplik\u00e1ciou si m\u00f4\u017eete pozrie\u0165 vo videu.<\/p>\n

Esp8266.<\/b><\/p>\n

Modul sa nahr\u00e1va v prostred\u00ed programovania Arduino, av\u0161ak chcem poznamena\u0165, \u017ee modul m\u00e1 probl\u00e9my s nahr\u00e1van\u00edm v posledn\u00fdch verzi\u00e1ch Arduina, preto odpor\u00fa\u010dam pou\u017ei\u0165 verziu 1.6.4.
\nAko pr\u00edklad je k esp8266 pripojen\u00e1 LED di\u00f3da (pin 5) a teplotn\u00fd senzor ds18b20 (pin 2).
\nKe\u010f\u017ee na ovl\u00e1danie LED di\u00f3dy je potrebn\u00e9 z\u00edskava\u0165 \u00fadaje, esp po pripojen\u00ed mus\u00ed prihl\u00e1si\u0165 odber na pr\u00edslu\u0161n\u00fa t\u00e9mu \"test\/led\" inak v\u0161etky odoslan\u00e9 d\u00e1ta prejd\u00fa okolo n\u00e1\u0161ho mikrokontrol\u00e9ra.
\nNa odosielanie teplotn\u00fdch \u00fadajov nie je potrebn\u00e9 prihl\u00e1si\u0165 sa, ale pri prenose hodn\u00f4t teploty je potrebn\u00e9 uvies\u0165 t\u00e9mu, do ktorej tieto \u00fadaje p\u00f4jdu.<\/p>\n

Ni\u017e\u0161ie je uveden\u00fd sket\u010d s podrobn\u00fdmi koment\u00e1rmi.<\/p>\n

Ske\u010d Esp8266_mqtt.ino<\/b>\/\/ \u0421\u0432\u0435\u0442\u043e\u0434\u0438\u043e\u0434 \u043f\u043e\u0434\u043b\u043a\u044e\u0447\u0435\u043d \u043a 5 \u043f\u0438\u043d\u0443
\n\/\/ \u0414\u0430\u0442\u0447\u0438\u043a \u0442\u0435\u043c\u043f\u0435\u0440\u0430\u0442\u0443\u0440\u044b ds18b20 \u043a 2 \u043f\u0438\u043d\u0443<\/p>\n

#include <ESP8266WiFi.h>
\n#include <PubSubClient.h>
\n#include <OneWire.h>
\n#include <DallasTemperature.h><\/p>\n

#define ONE_WIRE_BUS 2
\nOneWire oneWire(ONE_WIRE_BUS);
\nDallasTemperature senzory(&oneWire);<\/p>\n

const char *ssid = \"AIRPORT\"; \/\/ N\u00e1zov wifi pr\u00edstupov\u00e9ho bodu
\nconst char *pass = \"PASSWORD\"; \/\/ Heslo pre pr\u00edstupov\u00fd bod<\/p>\n

const char *mqtt_server = \"server\"; \/\/ N\u00e1zov MQTT servera
\nconst int mqtt_port = 11140; \/\/ Port na pripojenie k MQTT serveru
\nconst char *mqtt_user = \"Login\"; \/\/ Prihlasovacie \u00fadaje k serveru
\nconst char *mqtt_pass = \"Pass\"; \/\/ Heslo k serveru<\/p>\n

#define BUFFER_SIZE 100<\/p>\n

bool LedState = false;
\nint tm=300;
\nfloat temp=0;<\/p>\n

\/\/ \u0424\u0443\u043d\u043a\u0446\u0438\u044f \u043f\u043e\u043b\u0443\u0447\u0435\u043d\u0438\u044f \u0434\u0430\u043d\u043d\u044b\u0445 \u043e\u0442 \u0441\u0435\u0440\u0432\u0435\u0440\u0430<\/p>\n

void callback(const MQTT::Publish& pub)
\n{
\n Serial.print(pub.topic()); \/\/ cez s\u00e9riov\u00fd port vyp\u00ed\u0161eme n\u00e1zov t\u00e9my
\n Serial.print(\" => \");
\n Serial.print(pub.payload_string()); \/\/ cez s\u00e9riov\u00fd port vyp\u00ed\u0161eme hodnotu prijat\u00fdch \u00fadajov<\/p>\n

String payload = pub.payload_string();<\/p>\n

if(String(pub.topic()) == \"test\/led\") \/\/ kontrolujeme, \u010di d\u00e1ta pri\u0161li z po\u017eadovan\u00e9ho topiku
\n {
\n int stled = payload.toInt(); \/\/ prev\u00e1dzame prijat\u00e9 \u00fadaje na typ integer
\n digitalWrite(5,stled); \/\/ zapneme alebo vypneme LED di\u00f3du v z\u00e1vislosti od prijat\u00fdch hodn\u00f4t \u00fadajov
\n }
\n}<\/p>\n

WiFiClient wclient;
\nPubSubClient client(wclient, mqtt_server, mqtt_port);<\/p>\n

void setup() {<\/p>\n

sensors.begin();
\n Serial.begin(115200);
\n delay(10);
\n Serial.println();
\n Serial.println();
\n pinMode(5, OUTPUT);
\n}<\/p>\n

void loop() {
\n \/\/ \u043f\u043e\u0434\u043a\u043b\u044e\u0447\u0430\u0435\u043c\u0441\u044f \u043a wi-fi
\n if (WiFi.status() != WL_CONNECTED) {
\n Serial.print(\"Pripojovanie k \");
\n Serial.print(ssid);
\n Serial.println(\"...\");
\n WiFi.begin(ssid, pass);<\/p>\n

if (WiFi.waitForConnectResult() != WL_CONNECTED)
\n return;
\n Serial.println(\"WiFi pripojen\u00e9\");
\n }<\/p>\n

\/\/ \u043f\u043e\u0434\u043a\u043b\u044e\u0447\u0430\u0435\u043c\u0441\u044f \u043a MQTT \u0441\u0435\u0440\u0432\u0435\u0440\u0443
\n if (WiFi.status() == WL_CONNECTED) {
\n if (!client.connected()) {
\n Serial.println(\"Pripojovanie k MQTT serveru\");
\n if (client.connect(MQTT::Connect(\"arduinoClient2\")
\n .set_auth(mqtt_user, mqtt_pass))) {
\n Serial.println(\"Pripojen\u00e9 k MQTT serveru\");
\n client.set_callback(callback);
\n client.subscribe(\"test\/led\"); \/\/ prihlasujeme sa k topiku s d\u00e1tami pre LED
\n } else {
\n Serial.println(\"Nepodarilo sa pripoji\u0165 k MQTT serveru\");
\n }
\n }<\/p>\n

if (client.connected()){
\n client.loop();
\n TempSend();
\n }<\/p>\n

}
\n} \/\/ koniec hlavn\u00e9ho cyklu<\/p>\n

\/\/ \u0424\u0443\u043d\u043a\u0446\u0438\u044f \u043e\u0442\u043f\u0440\u0430\u0432\u043a\u0438 \u043f\u043e\u043a\u0430\u0437\u0430\u043d\u0438\u0439 \u0441 \u0442\u0435\u0440\u043c\u043e\u0434\u0430\u0442\u0447\u0438\u043a\u0430
\nvoid TempSend(){
\n if (tm==0)
\n {
\n sensors.requestTemperatures(); \/\/ z\u00edska\u0165 hodnotu teploty z senzora
\n float temp = sensors.getTempCByIndex(0);
\n client.publish(\"test\/temp\", String(temp)); \/\/ posielame hodnotu teploty do topiku pre teplomer
\n Serial.println(temp);
\n tm = 300; \/\/ prest\u00e1vka medzi odosielan\u00edm hodn\u00f4t teploty pribli\u017ene 3 sekundy
\n }
\n tm--;
\n delay(10);
\n}
\n<\/code><\/p>\n

\nV d\u00f4sledku tohto z\u00edskavame pohodln\u00fd n\u00e1stroj na dia\u013ekov\u00e9 ovl\u00e1danie a monitorovanie \u00fadajov, ktor\u00fd je dos\u0165 jednoduch\u00fd na nau\u010denie a bude zvl\u00e1dnute\u013en\u00fd aj pre za\u010diato\u010dn\u00edkov.<\/p>\n

Video s demon\u0161tr\u00e1ciou fungovania syst\u00e9mu ovl\u00e1dania<\/b>
\n

\r\n \"Prehrajte\r\n
<\/div>\r\n <\/div><\/center><\/p>\n

Podrobn\u00fd video n\u00e1vod na nastavenie syst\u00e9mu<\/b>
\n

\r\n \"Prehrajte\r\n
<\/div>\r\n <\/div><\/center><\/p>\n

Jeden z variantov aplik\u00e1cie ovl\u00e1dania esp8266 cez MQTT protokol<\/b>
\n

\r\n \"Prehrajte\r\n
<\/div>\r\n <\/div><\/center><\/p>\n

Ovl\u00e1danie LED p\u00e1sku cez internet<\/b>
\n

\r\n \"Prehrajte\r\n
<\/div>\r\n <\/div><\/center><\/p>\n

Ak m\u00e1te ot\u00e1zky oh\u013eadom tohto materi\u00e1lu, odpor\u00fa\u010dam pozrie\u0165 druh\u00fa \u010das\u0165 videa, kde je materi\u00e1l podan\u00fd zrozumite\u013enej\u0161ie.<\/p>\n

V arch\u00edve sa nach\u00e1dzaj\u00fa sketch a v\u0161etky potrebn\u00e9 kni\u017enice na prep\u00edsanie mikrokontrol\u00e9ra sketchom z pr\u00edkladu.
\nUpozor\u0148ujem, \u017ee kni\u017enica ESP8266WiFi.h nie je zahrnut\u00e1 v tomto arch\u00edve, in\u0161taluje sa cez spr\u00e1vcov dosiek v prostred\u00ed Arduino.<\/p>\n

ARCH\u00cdV<\/b><\/a><\/noindex><\/p>\n

MQTT server \u2014 www.cloudmqtt.com<\/a><\/noindex><\/p>\n

Odkaz na aplik\u00e1ciu IoT MQTT Dashboard \u2014 play.google.com\/store\/apps\/details?id=com.thn.iotmqttdashboard&hl=sk<\/a><\/noindex><\/p>\n

V\u0161etk\u00fdm \u010fakujem za pozornos\u0165.
\n
Zdroj: habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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MQTT. \u0418\u0434\u0435\u044f \u0434\u0438\u0441\u0442\u0430\u043d\u0446\u0438\u043e\u043d\u043d\u043e\u0433\u043e \u0443\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u044f \u0438 \u043c\u043e\u043d\u0438\u0442\u043e\u0440\u0438\u043d\u0433\u0430 \u0432\u0441\u0435\u0433\u0434\u0430 \u0431\u0443\u0434\u043e\u0440\u0430\u0436\u0438\u043b\u0430 \u0443\u043c\u044b \u0443\u0432\u043b\u0435\u0447\u0435\u043d\u043d\u044b\u0445 \u0432 \u044d\u043b\u0435\u043a\u0442\u0440\u043e\u043d\u0438\u043a\u0435 \u0438 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u0438 \u043b\u044e\u0434\u0435\u0439. \u0412\u0435\u0434\u044c \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u044c \u0432 \u043b\u044e\u0431\u043e\u0439 \u043c\u043e\u043c\u0435\u043d\u0442 \u0432\u0440\u0435\u043c\u0435\u043d\u0438 \u043f\u043e\u043b\u0443\u0447\u0438\u0442\u044c \u0438\u043b\u0438 \u043e\u0442\u043f\u0440\u0430\u0432\u0438\u0442\u044c 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