428eb51850
clients can now connect to outside. bug fixed for broker (pings etc.) crashes fixed when clients where removed More examples added (the tinymqtt-test is great)
91 lines
2.4 KiB
C++
91 lines
2.4 KiB
C++
#include <TinyMqtt.h> // https://github.com/hsaturn/TinyMqtt
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#include <Streaming.h> // https://github.com/janelia-arduino/Streaming
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// TODO should be renamed to most-complete setup
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/**
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* Local broker that accept connections
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*
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* pros - Reduces internal latency (when publish is received by the same ESP)
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* - Reduces wifi traffic
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* - No need to have an external broker
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* - can still report to a 'main' broker (TODO see documentation that have to be written)
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* - accepts external clients
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*
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* cons - Takes more memory
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* - a bit hard to understand
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*
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* This sounds crazy: a mqtt mqtt that do not need a broker !
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* The use case arise when one ESP wants to publish topics and subscribe to them at the same time.
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* Without broker, the ESP won't react to its own topics.
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*
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* TinyMqtt mqtt allows this use case to work.
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*/
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#include <my_credentials.h>
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std::string topic="sensor/temperature";
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MqttBroker broker(1883);
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MqttClient mqtt_a(&broker);
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MqttClient mqtt_b(&broker);
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void onPublishA(const Topic& topic, const char* payload, size_t length)
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{ Serial << "--> A Received " << topic.c_str() << endl; }
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void onPublishB(const Topic& topic, const char* payload, size_t length)
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{ Serial << "--> B Received " << topic.c_str() << endl; }
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void setup()
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{
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Serial.begin(115200);
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delay(500);
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Serial << "Clients with wifi " << endl;
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WiFi.mode(WIFI_STA);
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WiFi.begin(ssid, password);
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while (WiFi.status() != WL_CONNECTED) { Serial << '-'; delay(500); }
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Serial << "Connected to " << ssid << "IP address: " << WiFi.localIP() << endl;
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broker.begin();
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mqtt_a.setCallback(onPublishA);
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mqtt_a.subscribe(topic);
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mqtt_b.setCallback(onPublishB);
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mqtt_b.subscribe(topic);
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}
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void loop()
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{
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broker.loop();
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mqtt_a.loop();
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mqtt_b.loop();
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// ============= client A publish ================
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static const int intervalA = 50000;
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static uint32_t timerA = millis() + intervalA;
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if (millis() > timerA)
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{
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Serial << "A is publishing " << topic.c_str() << endl;
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timerA += intervalA;
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mqtt_a.publish(topic);
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}
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// ============= client B publish ================
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static const int intervalB = 30000; // will send topic each 5000 ms
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static uint32_t timerB = millis() + intervalB;
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if (millis() > timerB)
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{
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Serial << "B is publishing " << topic.c_str() << endl;
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timerB += intervalB;
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mqtt_b.publish(topic, std::string(String(15+millis()%10).c_str()));
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}
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}
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