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
main.cpp
- Committer:
- cdupaty
- Date:
- 2020-06-11
- Revision:
- 24:cc01ff2c2603
- Parent:
- 21:a68bd76740f9
File content as of revision 24:cc01ff2c2603:
/******************************************************************************* * Copyright (c) 2014, 2015 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 * Ian Craggs - make sure QoS2 processing works, and add device headers * * Adaptation STM32 NUCLEO and mosquitto.org : C.Dupaty * 06/2020 * This demo works on NUCLEO STM32. WIFI link with ESP8266 connected Configuration in mbed_app.json target_overrides for the UART connection of the ESP8266 and the WIFI connection (SSID / PASS) MQTT parameters are configured in #define below if receive payload with first q -> exit if receive payload with first l -> toggle LED1 on NUCLEO * *******************************************************************************/ #include "easy-connect.h" #include "MQTTNetwork.h" #include "MQTTmbed.h" #include "MQTTClient.h" DigitalOut led(LED1); Serial pc(USBTX, USBRX); #define board "NUCLEO_F411RE" /* MQTT QOS, There are 3 QoS levels in MQTT At most once (MQTT::QOS0) At least once (MQTT::QOS1) Exactly once (MQTT::QOS2). */ #define quality MQTT::QOS0 /* retained flag : The broker stores the last retained message and the corresponding QoS for that topic. Each client that subscribes to a topic pattern that matches the topic of the retained message receives the retained message immediately after they subscribe. The broker stores only one retained message per topic. */ #define ret false /* dup flag : The flag indicates that the message is a duplicate and was resent because the intended recipient (client or broker) did not acknowledge the original message. */ #define dupli false //DigitalIn btn(USER_BUTTON); //PC13 sur F411 DigitalIn btn(PA_8,PullUp); // button connected with internal pullup const char* hostname = "test.mosquitto.org"; const int port = 1883; char* ID ="mbedSTM32Fourcade"; char* user =NULL; // user & pass = NULL for broker with no credential. char* pass =NULL; const char* topic = "topic0"; int arrivedcount=0; bool quit=false; NetworkInterface* network = easy_connect(true); MQTTNetwork mqttNetwork(network); MQTT::Client<MQTTNetwork, Countdown> client(mqttNetwork); MQTT::Message message; MQTTPacket_connectData data = MQTTPacket_connectData_initializer; void messageArrived(MQTT::MessageData& md) { MQTT::Message &message = md.message; pc.printf("\x1B[33m"); // yellow pc.printf("Message arrived -> qos %d, retained %d, dup %d, packetid %d\r\n", message.qos, message.retained, message.dup, message.id); pc.printf("Payload -> %.*s\r\n", message.payloadlen, (char*)message.payload); ++arrivedcount; if (*(char*)message.payload=='q') { pc.printf("\x1B[31m"); // red pc.printf("Exit command received\n\r"); quit=true; } if (*(char*)message.payload=='l') { led=!led; pc.printf("\x1B[31m"); // red pc.printf("toggle LED\n\r"); } pc.printf("\x1B[0m"); // raz } void connection(void) { int rc; pc.printf("\x1B[32m"); // green pc.printf("Connecting to MQTT broker %s:%d\r\n", hostname, port); if ((rc = client.connect(data)) != 0) pc.printf("rc from MQTT connect is %d\r\n", rc); else pc.printf("connection MQTT OK ID:%s USER:%s PASS:%s\r\n",ID,user,pass); if ((rc = client.subscribe(topic, quality, messageArrived)) != 0) pc.printf("rc from MQTT subscribe is %d\r\n", rc); else pc.printf("Subscribe MQTT OK topic:%s quality:%d\r\n",topic,quality); pc.printf("\x1B[0m"); // raz } void deconnection(void) { int rc; pc.printf("\x1B[36m"); // cyan if ((rc = client.unsubscribe(topic)) != 0) pc.printf("rc from unsubscribe was %d\r\n", rc); else pc.printf("unsubscribe OK \r\n"); if ((rc = client.disconnect()) != 0) pc.printf("rc from disconnect was %d\r\n", rc); else pc.printf("disconnect OK\r\n"); mqttNetwork.disconnect(); pc.printf("\x1B[0m"); // raz } int main(int argc, char* argv[]) { int rc; int cpt=0; char buf[100]; //pc.printf("\x1B[2J"); //efface ecran //pc.printf("\x1B[0;0H"); // curseur en 0,0 pc.printf("\x1B[1m"); // brillant pc.printf("\r\nMQTT test on %s\r\n",board); pc.printf("--------------------------\r\n\r\n"); pc.printf("\x1B[33m"); // yellow wait(1); // TCP connection mqttNetwork.connect(hostname, port); if (rc != 0) pc.printf("rc from TCP connect is %d\r\n", rc); else pc.printf("WIFI network connection OK\r\n"); // MQTT data data.MQTTVersion = 3; data.clientID.cstring = ID; data.username.cstring = user; data.password.cstring = pass; message.qos = quality; message.retained = ret; message.dup = dupli; message.payload = (void*)buf; connection(); while(!quit) { pc.printf("---> Press button to send : %s<--- \n\r",topic); while(btn); while(!btn); //connection(); sprintf(buf, "Message from %s number -> %d \r\n", board,++cpt); pc.printf("Send message -> %s\n\r",buf); message.payloadlen = strlen(buf)+1; if ((rc = client.publish(topic, message)) !=0) pc.printf("rc publication error %d\r\n", rc); client.yield(100); //deconnection(); } deconnection(); pc.printf("Disconnect from MQTT network. End of program, %d messages arrived\r\n",arrivedcount); return 0; }