On Node-Red and MQTT
Dependencies: mbed ESP8266Interface MbedJSONValue MQTT JSON
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?
User | Revision | Line number | New 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 | } |