ESP8266 / Mbed 2 deprecated ESP8266_MQTT_HelloWorld

Example MQTT implemented on the ESP8266

Dependencies:   ESP8266Interface MQTT mbed-rtos mbed

Fork of HelloMQTT by MQTT

This is an example of how to run MQTT using the esp8266 as the network connection. This program will default to trying to talk to a public MQTT server (test.mosquitto.org). The example will subscribe to a topic and then publish to that topic. In this way it will effectively echo back to itself. You can alternatively use a private mqtt broker,[[TODO: |instructions here]]

Please note that the ESP8266 interface cannot translate hostnames to IP Addresses, it can only accept raw IP Addresses as input.

main.cpp@17:92a64d43ee61, 2015-06-05 (annotated)

Committer:
geky
Date:
Fri Jun 05 15:15:24 2015 +0000
Revision:
17:92a64d43ee61
Parent:
16:28d062c5522b
Child:
18:76d0899bc3ce
Modified to use ESP8266

Who changed what in which revision?

UserRevisionLine numberNew contents of line
icraggs 1:a1d5c7a6acbc 1 /*******************************************************************************
icraggs 1:a1d5c7a6acbc 2 * Copyright (c) 2014 IBM Corp.
icraggs 1:a1d5c7a6acbc 3 *
icraggs 1:a1d5c7a6acbc 4 * All rights reserved. This program and the accompanying materials
icraggs 1:a1d5c7a6acbc 5 * are made available under the terms of the Eclipse Public License v1.0
icraggs 1:a1d5c7a6acbc 6 * and Eclipse Distribution License v1.0 which accompany this distribution.
icraggs 1:a1d5c7a6acbc 7 *
icraggs 1:a1d5c7a6acbc 8 * The Eclipse Public License is available at
icraggs 1:a1d5c7a6acbc 9 * http://www.eclipse.org/legal/epl-v10.html
icraggs 1:a1d5c7a6acbc 10 * and the Eclipse Distribution License is available at
icraggs 1:a1d5c7a6acbc 11 * http://www.eclipse.org/org/documents/edl-v10.php.
icraggs 1:a1d5c7a6acbc 12 *
icraggs 1:a1d5c7a6acbc 13 * Contributors:
icraggs 1:a1d5c7a6acbc 14 * Ian Craggs - initial API and implementation and/or initial documentation
icraggs 1:a1d5c7a6acbc 15 *******************************************************************************/
geky 17:92a64d43ee61 16
geky 17:92a64d43ee61 17 /**
geky 17:92a64d43ee61 18 This is a sample program to illustrate the use of the MQTT Client library
geky 17:92a64d43ee61 19 on the mbed platform. The Client class requires two classes which mediate
geky 17:92a64d43ee61 20 access to system interfaces for networking and timing. As long as these two
geky 17:92a64d43ee61 21 classes provide the required public programming interfaces, it does not matter
geky 17:92a64d43ee61 22 what facilities they use underneath. In this program, they use the mbed
geky 17:92a64d43ee61 23 system libraries.
geky 17:92a64d43ee61 24
geky 17:92a64d43ee61 25 */
icraggs 1:a1d5c7a6acbc 26
icraggs 2:638c854c0695 27
geky 17:92a64d43ee61 28 #include "MQTTESP8266.h"
icraggs 2:638c854c0695 29 #include "MQTTClient.h"
icraggs 2:638c854c0695 30
icraggs 2:638c854c0695 31 int arrivedcount = 0;
icraggs 2:638c854c0695 32
icraggs 8:a3e3113054a1 33
icraggs 9:5beb8609e9f7 34 void messageArrived(MQTT::MessageData& md)
icraggs 2:638c854c0695 35 {
icraggs 9:5beb8609e9f7 36 MQTT::Message &message = md.message;
icraggs 9:5beb8609e9f7 37 printf("Message arrived: qos %d, retained %d, dup %d, packetid %d\n", message.qos, message.retained, message.dup, message.id);
icraggs 9:5beb8609e9f7 38 printf("Payload %.*s\n", message.payloadlen, (char*)message.payload);
icraggs 2:638c854c0695 39 ++arrivedcount;
icraggs 2:638c854c0695 40 }
icraggs 0:0cae29831d01 41
icraggs 2:638c854c0695 42 int main(int argc, char* argv[])
geky 17:92a64d43ee61 43 {
geky 17:92a64d43ee61 44 printf("Starting\n");
geky 17:92a64d43ee61 45 MQTTESP8266 ipstack(D1, D0, D10, "ssid", "password");
icraggs 9:5beb8609e9f7 46 float version = 0.47;
icraggs 2:638c854c0695 47 char* topic = "mbed-sample";
geky 17:92a64d43ee61 48
sam_grove 5:4a257f6ac09a 49 printf("Version is %f\n", version);
geky 17:92a64d43ee61 50
geky 17:92a64d43ee61 51 MQTT::Client<MQTTESP8266, Countdown> client = MQTT::Client<MQTTESP8266, Countdown>(ipstack);
geky 17:92a64d43ee61 52
geky 17:92a64d43ee61 53 char* hostname = "192.168.1.20";
icraggs 6:e4c690c45021 54 int port = 1883;
icraggs 6:e4c690c45021 55 int rc = ipstack.connect(hostname, port);
icraggs 6:e4c690c45021 56 if (rc != 0)
geky 17:92a64d43ee61 57 printf("rc from TCP connect is %d\n", rc);
geky 17:92a64d43ee61 58
geky 17:92a64d43ee61 59 MQTTPacket_connectData data = MQTTPacket_connectData_initializer;
icraggs 6:e4c690c45021 60 data.MQTTVersion = 3;
icraggs 8:a3e3113054a1 61 data.clientID.cstring = "mbed-sample";
icraggs 12:086a9314e8a5 62 data.username.cstring = "testuser";
icraggs 12:086a9314e8a5 63 data.password.cstring = "testpassword";
icraggs 16:28d062c5522b 64 if ((rc = client.connect(data)) != 0)
geky 17:92a64d43ee61 65 printf("rc from MQTT connect is %d\n", rc);
geky 17:92a64d43ee61 66
geky 17:92a64d43ee61 67 if ((rc = client.subscribe("mbed-sample", MQTT::QOS1, messageArrived)) != 0)
geky 17:92a64d43ee61 68 printf("rc from MQTT subscribe is %d\n", rc);
icraggs 2:638c854c0695 69
icraggs 2:638c854c0695 70 MQTT::Message message;
icraggs 0:0cae29831d01 71
icraggs 2:638c854c0695 72 // QoS 0
icraggs 2:638c854c0695 73 char buf[100];
icraggs 2:638c854c0695 74 sprintf(buf, "Hello World! QoS 0 message from app version %f\n", version);
icraggs 2:638c854c0695 75 message.qos = MQTT::QOS0;
icraggs 2:638c854c0695 76 message.retained = false;
icraggs 2:638c854c0695 77 message.dup = false;
icraggs 2:638c854c0695 78 message.payload = (void*)buf;
icraggs 2:638c854c0695 79 message.payloadlen = strlen(buf)+1;
icraggs 16:28d062c5522b 80 rc = client.publish(topic, message);
icraggs 12:086a9314e8a5 81 while (arrivedcount < 1)
icraggs 2:638c854c0695 82 client.yield(100);
geky 17:92a64d43ee61 83
icraggs 2:638c854c0695 84 // QoS 1
icraggs 2:638c854c0695 85 sprintf(buf, "Hello World! QoS 1 message from app version %f\n", version);
icraggs 2:638c854c0695 86 message.qos = MQTT::QOS1;
icraggs 2:638c854c0695 87 message.payloadlen = strlen(buf)+1;
icraggs 16:28d062c5522b 88 rc = client.publish(topic, message);
icraggs 12:086a9314e8a5 89 while (arrivedcount < 2)
icraggs 2:638c854c0695 90 client.yield(100);
geky 17:92a64d43ee61 91
icraggs 2:638c854c0695 92 // QoS 2
icraggs 2:638c854c0695 93 sprintf(buf, "Hello World! QoS 2 message from app version %f\n", version);
icraggs 2:638c854c0695 94 message.qos = MQTT::QOS2;
icraggs 2:638c854c0695 95 message.payloadlen = strlen(buf)+1;
icraggs 16:28d062c5522b 96 rc = client.publish(topic, message);
icraggs 12:086a9314e8a5 97 while (arrivedcount < 3)
icraggs 2:638c854c0695 98 client.yield(100);
geky 17:92a64d43ee61 99
icraggs 12:086a9314e8a5 100 // n * QoS 2
geky 17:92a64d43ee61 101 for (int i = 1; i <= 10; ++i) {
icraggs 12:086a9314e8a5 102 sprintf(buf, "Hello World! QoS 2 message number %d from app version %f\n", i, version);
icraggs 12:086a9314e8a5 103 message.qos = MQTT::QOS2;
icraggs 12:086a9314e8a5 104 message.payloadlen = strlen(buf)+1;
icraggs 16:28d062c5522b 105 rc = client.publish(topic, message);
icraggs 12:086a9314e8a5 106 while (arrivedcount < i + 3)
icraggs 12:086a9314e8a5 107 client.yield(100);
icraggs 12:086a9314e8a5 108 }
geky 17:92a64d43ee61 109
icraggs 8:a3e3113054a1 110 if ((rc = client.unsubscribe(topic)) != 0)
sam_grove 5:4a257f6ac09a 111 printf("rc from unsubscribe was %d\n", rc);
geky 17:92a64d43ee61 112
icraggs 8:a3e3113054a1 113 if ((rc = client.disconnect()) != 0)
sam_grove 5:4a257f6ac09a 114 printf("rc from disconnect was %d\n", rc);
geky 17:92a64d43ee61 115
icraggs 2:638c854c0695 116 ipstack.disconnect();
sam_grove 5:4a257f6ac09a 117 printf("Finishing with %d messages received\n", arrivedcount);
geky 17:92a64d43ee61 118
icraggs 0:0cae29831d01 119 return 0;
icraggs 0:0cae29831d01 120 }