Simple demo with GPIO MQTT protocol test on STM32 broker tests.mosquitto.org WIFI interface ESP8266 Issue of topic0 by pressing the button If reception of ', switching of the led If received from 'q' end of program
This is a MQTT protocol test on STM32 NUCLEO The broker is tests.mosquitto.org The WIFI interface is ESP8266
For configuration please check mbed_app.json and #define in main.cpp
Issue of topic0 by pressing the button If received 'l' from broker then switching of the led If received 'q' from broker then end the program
Information and debug with a terminal using UART over USB
This test has been checked with MQTT.fx
Revision 3:7a6a899de7cc, committed 2014-05-06
- Comitter:
- icraggs
- Date:
- Tue May 06 09:45:22 2014 +0000
- Parent:
- 2:638c854c0695
- Child:
- 4:c696f27c1850
- Child:
- 6:e4c690c45021
- Commit message:
- Use latest MQTT library on both mbed and Linux
Changed in this revision
--- a/MQTT.lib Wed Apr 30 13:16:09 2014 +0000 +++ b/MQTT.lib Tue May 06 09:45:22 2014 +0000 @@ -1,1 +1,1 @@ -http://mbed.org/teams/mqtt/code/MQTT/#aadb79d29330 +http://mbed.org/teams/mqtt/code/MQTT/#05fc7de97d4a
--- a/main.cpp Wed Apr 30 13:16:09 2014 +0000 +++ b/main.cpp Tue May 06 09:45:22 2014 +0000 @@ -153,13 +153,13 @@ lcd.printf("Version is %f\n", version); - MQTT::Client<IPStack, Countdown>client = MQTT::Client<IPStack, Countdown>(&ipstack); + MQTT::Client<IPStack, Countdown> client = MQTT::Client<IPStack, Countdown>(ipstack); + + client.setConnectionLostHandler(connect); MQTT::Client<IPStack, Countdown>::connectionLostInfo info = {&client, &ipstack}; int rc = connect(&info); - client.setConnectionLostHandler(connect); - rc = client.subscribe(topic, MQTT::QOS1, messageArrived); if (rc != 0) lcd.printf("rc from MQTT subscribe is %d\n", rc);
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/main_linux.cpp Tue May 06 09:45:22 2014 +0000 @@ -0,0 +1,324 @@ +/******************************************************************************* + * Copyright (c) 2014 IBM Corp. + * + * All rights reserved. This program and the accompanying materials + * are made available under the terms of the Eclipse Public License v1.0 + * and Eclipse Distribution License v1.0 which accompany this distribution. + * + * The Eclipse Public License is available at + * http://www.eclipse.org/legal/epl-v10.html + * and the Eclipse Distribution License is available at + * http://www.eclipse.org/org/documents/edl-v10.php. + * + * Contributors: + * Ian Craggs - initial API and implementation and/or initial documentation + *******************************************************************************/ + + /** + This is a sample program to illustrate the use of the MQTT Client library + on Linux. The Client class requires two classes which mediate + access to system interfaces for networking and timing. As long as these two + classes provide the required public programming interfaces, it does not matter + what facilities they use underneath. In this program, they use the Linux + system libraries. + + */ + +#if defined(LINUX) + +#include <sys/types.h> +#include <sys/socket.h> +#include <sys/param.h> +#include <sys/time.h> +#include <sys/select.h> +#include <netinet/in.h> +#include <netinet/tcp.h> +#include <arpa/inet.h> +#include <netdb.h> +#include <stdio.h> +#include <unistd.h> +#include <errno.h> +#include <fcntl.h> + +#include <stdlib.h> +#include <string.h> +#include <signal.h> + +#include "MQTTClient.h" +#include "FP.cpp" + +#define DEFAULT_STACK_SIZE -1 + + +class IPStack +{ +public: + IPStack() + { + + } + + int Socket_error(const char* aString) + { + + if (errno != EINTR && errno != EAGAIN && errno != EINPROGRESS && errno != EWOULDBLOCK) + { + if (strcmp(aString, "shutdown") != 0 || (errno != ENOTCONN && errno != ECONNRESET)) + printf("Socket error %s in %s for socket %d\n", strerror(errno), aString, mysock); + } + return errno; + } + + int connect(const char* hostname, int port) + { + int type = SOCK_STREAM; + struct sockaddr_in address; + int rc = -1; + sa_family_t family = AF_INET; + struct addrinfo *result = NULL; + struct addrinfo hints = {0, AF_UNSPEC, SOCK_STREAM, IPPROTO_TCP, 0, NULL, NULL, NULL}; + + if ((rc = getaddrinfo(hostname, NULL, &hints, &result)) == 0) + { + struct addrinfo* res = result; + + /* prefer ip4 addresses */ + while (res) + { + if (res->ai_family == AF_INET) + { + result = res; + break; + } + res = res->ai_next; + } + + if (result->ai_family == AF_INET) + { + address.sin_port = htons(port); + address.sin_family = family = AF_INET; + address.sin_addr = ((struct sockaddr_in*)(result->ai_addr))->sin_addr; + } + else + rc = -1; + + freeaddrinfo(result); + } + + if (rc == 0) + { + mysock = socket(family, type, 0); + if (mysock != -1) + { + int opt = 1; + + //if (setsockopt(mysock, SOL_SOCKET, SO_NOSIGPIPE, (void*)&opt, sizeof(opt)) != 0) + // printf("Could not set SO_NOSIGPIPE for socket %d", mysock); + + rc = ::connect(mysock, (struct sockaddr*)&address, sizeof(address)); + } + } + + return rc; + } + + int read(char* buffer, int len, int timeout_ms) + { + struct timeval interval = {timeout_ms / 1000, (timeout_ms % 1000) * 1000}; + if (interval.tv_sec < 0 || (interval.tv_sec == 0 && interval.tv_usec <= 0)) + { + interval.tv_sec = 0; + interval.tv_usec = 100; + } + + setsockopt(mysock, SOL_SOCKET, SO_RCVTIMEO, (char *)&interval, sizeof(struct timeval)); + + //printf("reading %d bytes\n", len); + int rc = ::recv(mysock, buffer, (size_t)len, 0); + if (rc == -1) + Socket_error("read"); + //printf("read %d bytes\n", rc); + return rc; + } + + int write(char* buffer, int len, int timeout) + { + struct timeval tv; + + tv.tv_sec = 0; /* 30 Secs Timeout */ + tv.tv_usec = timeout * 1000; // Not init'ing this can cause strange errors + + setsockopt(mysock, SOL_SOCKET, SO_RCVTIMEO, (char *)&tv,sizeof(struct timeval)); + int rc = ::write(mysock, buffer, len); + //printf("write rc %d\n", rc); + return rc; + } + + int disconnect() + { + return ::close(mysock); + } + +private: + + int mysock; + +}; + + +class Countdown +{ +public: + Countdown() + { + + } + + Countdown(int ms) + { + countdown_ms(ms); + } + + + bool expired() + { + struct timeval now, res; + gettimeofday(&now, NULL); + timersub(&end_time, &now, &res); + //printf("left %d ms\n", (res.tv_sec < 0) ? 0 : res.tv_sec * 1000 + res.tv_usec / 1000); + //if (res.tv_sec > 0 || res.tv_usec > 0) + // printf("expired %d %d\n", res.tv_sec, res.tv_usec); + return res.tv_sec < 0 || (res.tv_sec == 0 && res.tv_usec <= 0); + } + + + void countdown_ms(int ms) + { + struct timeval now; + gettimeofday(&now, NULL); + struct timeval interval = {ms / 1000, (ms % 1000) * 1000}; + //printf("interval %d %d\n", interval.tv_sec, interval.tv_usec); + timeradd(&now, &interval, &end_time); + } + + + void countdown(int seconds) + { + struct timeval now; + gettimeofday(&now, NULL); + struct timeval interval = {seconds, 0}; + timeradd(&now, &interval, &end_time); + } + + + int left_ms() + { + struct timeval now, res; + gettimeofday(&now, NULL); + timersub(&end_time, &now, &res); + //printf("left %d ms\n", (res.tv_sec < 0) ? 0 : res.tv_sec * 1000 + res.tv_usec / 1000); + return (res.tv_sec < 0) ? 0 : res.tv_sec * 1000 + res.tv_usec / 1000; + } + +private: + + struct timeval end_time; +}; + + +int arrivedcount = 0; + +void messageArrived(MQTT::Message* message) +{ + printf("Message %d arrived: qos %d, retained %d, dup %d, packetid %d\n", + ++arrivedcount, message->qos, message->retained, message->dup, message->id); + printf("Payload %.*s\n", message->payloadlen, (char*)message->payload); +} + + +int connect(MQTT::Client<IPStack, Countdown>::connectionLostInfo* info) +{ + const char* hostname = "localhost"; //"m2m.eclipse.org"; + int port = 1883; + printf("Connecting to %s:%d\n", hostname, port); + int rc = info->network->connect(hostname, port); + if (rc != 0) + printf("rc from TCP connect is %d\n", rc); + + MQTTPacket_connectData data = MQTTPacket_connectData_initializer; + data.MQTTVersion = 3; + data.clientID.cstring = (char*)"mbed-icraggs"; + rc = info->client->connect(&data); + if (rc != 0) + printf("rc from MQTT connect is %d\n", rc); + + return rc; +} + + +int main(int argc, char* argv[]) +{ + IPStack ipstack = IPStack(); + float version = 0.3; + const char* topic = "mbed-sample"; + + printf("Version is %f\n", version); + + MQTT::Client<IPStack, Countdown> client = MQTT::Client<IPStack, Countdown>(ipstack); + + client.setConnectionLostHandler(connect); + + MQTT::Client<IPStack, Countdown>::connectionLostInfo info = {&client, &ipstack}; + int rc = connect(&info); + + rc = client.subscribe(topic, MQTT::QOS2, messageArrived); + if (rc != 0) + printf("rc from MQTT subscribe is %d\n", rc); + + MQTT::Message message; + + // QoS 0 + char buf[100]; + sprintf(buf, "Hello World! QoS 0 message from app version %f", version); + message.qos = MQTT::QOS0; + message.retained = false; + message.dup = false; + message.payload = (void*)buf; + message.payloadlen = strlen(buf)+1; + rc = client.publish(topic, &message); + while (arrivedcount == 0) + client.yield(100); + + // QoS 1 + printf("Now QoS 1\n"); + sprintf(buf, "Hello World! QoS 1 message from app version %f", version); + message.qos = MQTT::QOS1; + message.payloadlen = strlen(buf)+1; + rc = client.publish(topic, &message); + while (arrivedcount == 1) + client.yield(100); + + // QoS 2 + sprintf(buf, "Hello World! QoS 2 message from app version %f", version); + message.qos = MQTT::QOS2; + message.payloadlen = strlen(buf)+1; + rc = client.publish(topic, &message); + while (arrivedcount == 2) + client.yield(100); + + rc = client.unsubscribe(topic); + if (rc != 0) + printf("rc from unsubscribe was %d\n", rc); + + rc = client.disconnect(); + if (rc != 0) + printf("rc from disconnect was %d\n", rc); + + ipstack.disconnect(); + + printf("Finishing with %d messages received\n", arrivedcount); + + return 0; +} + +#endif