Teensy 4.1 MQTT

[janvankeulen]

I cannot get this library to work with the Pubsubclient library to connect to MQTT over ethernet. I used the example from pubsubclient and replace Ethernet.h with NativeEthernet.h. Is there anything more I need to do? Other Ethernet functionality works 😕

[dondipietro]

Hello, I tried with : ArduinoMqttClient.h as mqtt client On base of the exemple "webclient" with NativeEthernet.h. And same problem it stay on attempting to connect to mqtt broker.

System get an ip

`/* Web client

This sketch connects to a website (http://www.google.com) using an Arduino Wiznet Ethernet shield.

Circuit:

• Ethernet shield attached to pins 10, 11, 12, 13

  created 18 Dec 2009 by David A. Mellis modified 9 Apr 2012 by Tom Igoe, based on work by Adrian McEwen

  */

include

include

include

define mqttport 1883

const char broker[] = "192.168.69.55";

// Enter a MAC address for your controller below. // Newer Ethernet shields have a MAC address printed on a sticker on the shield byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };

// if you don't want to use DNS (and reduce your sketch size) // use the numeric IP instead of the name for the server: //IPAddress server(74,125,232,128); // numeric IP for Google (no DNS) char server[] = "www.google.com"; // name address for Google (using DNS)

// Set the static IP address to use if the DHCP fails to assign IPAddress ip(192, 168, 0, 177); IPAddress myDns(192, 168, 0, 1);

// Initialize the Ethernet client library // with the IP address and port of the server // that you want to connect to (port 80 is default for HTTP): EthernetClient client; MqttClient mqttClient(client);

void connectMQTT() {
Serial.print("Attempting to MQTT broker: ");
Serial.print(broker);
Serial.println(" ");
//mqttClient.setUsernamePassword(AUTHMETHOD,AUTHTOKEN); //user pass while (!mqttClient.connect(broker, mqttport)) {
// failed, retry
Serial.print(".");
delay(5000);
}
Serial.println();

Serial.println("You're connected to the MQTT broker");
Serial.println();

// subscribe to a topic
//mqttClient.subscribe("arduino/incoming");
}

// Variables to measure the speed unsigned long beginMicros, endMicros; unsigned long byteCount = 0; bool printWebData = true; // set to false for better speed measurement

void setup() { // You can use Ethernet.init(pin) to configure the CS pin //Ethernet.init(10); // Most Arduino shields //Ethernet.init(5); // MKR ETH shield //Ethernet.init(0); // Teensy 2.0 //Ethernet.init(20); // Teensy++ 2.0 //Ethernet.init(15); // ESP8266 with Adafruit Featherwing Ethernet //Ethernet.init(33); // ESP32 with Adafruit Featherwing Ethernet

// Open serial communications and wait for port to open: Serial.begin(9600); while (!Serial) { ; // wait for serial port to connect. Needed for native USB port only }

// start the Ethernet connection: Serial.println("Initialize Ethernet with DHCP:"); if (Ethernet.begin(mac) == 0) { Serial.println("Failed to configure Ethernet using DHCP"); // Check for Ethernet hardware present if (Ethernet.hardwareStatus() == EthernetNoHardware) { Serial.println("Ethernet shield was not found. Sorry, can't run without hardware. :("); while (true) { delay(1); // do nothing, no point running without Ethernet hardware } } if (Ethernet.linkStatus() == LinkOFF) { Serial.println("Ethernet cable is not connected."); } // try to congifure using IP address instead of DHCP: Ethernet.begin(mac, ip, myDns); } else { Serial.print(" DHCP assigned IP "); Serial.println(Ethernet.localIP()); } // give the Ethernet shield a second to initialize: delay(1000); Serial.print("connecting to "); Serial.print(server); Serial.println("...");

// if you get a connection, report back via serial:

}

void loop() {

if (!mqttClient.connected()) {
// MQTT client is disconnected, connect
connectMQTT();
} mqttClient.beginMessage("/out"); //net power mqttClient.print("{\n\"test\" ");
mqttClient.print("\n}");
mqttClient.endMessage();
// do nothing forevermore:

  delay(1);

}

`

[weigu1]

Hi, I have the same problem I get all the time "MQTT connection failed, rc=-2"

Here is my code:

#include <NativeEthernet.h> //for teensy 4.1
#include <PubSubClient.h>

byte NETWORK_MAC[] = { 0xDE, 0xAA, 0xBE, 0xEF, 0xF3, 0x08 };
IPAddress NETWORK_IP      (192,168,1,31); //static IP

const char *MQTT_SERVER_IP = "192.168.1.60";
const int  MQTT_PORT = 1883;
const char *MQTT_CLIENT_ID = "heating1234";

EthernetClient eth_Client;
PubSubClient MQTT_Client(eth_Client);

void setup() {
  Serial.begin(115200);
  while (!Serial) ; // wait for Arduino Serial Monitor  
  Ethernet.begin(NETWORK_MAC,NETWORK_IP); 
  Serial.println("\nEthernet connected with IP address: ");
  Serial.println(Ethernet.localIP());    
  MQTT_Client.setServer(MQTT_SERVER_IP,MQTT_PORT);  
  while (!MQTT_Client.connected()) { // Loop until we're reconnected
    if (MQTT_Client.connect(MQTT_CLIENT_ID)) { // Attempt to connect
      Serial.print("MQTT connected");    
    }
    else {
      Serial.println("MQTT connection failed, rc=" + String(MQTT_Client.state()));      
      delay(5000);  // Wait 5 seconds before retrying
    }
  }
}
void loop() {}

I used the newest Arduino, Teensyduino and libs. Thanks for help

[si-hb]

Anyone have any luck? I have the exact same problem. I ported working code from a T3.2 with a Wiznet, to. T4.1 using NativeEthernet. Worked perfect on the T3.2, but on the T4.2 nothing but rc=-2. My code is similar to both examples above. Any other Ethernet stuff I try works fine, just not Pubsubclient and nativeethernet together.

[karelv]

+1

[si-hb]

Be sure to include a call to MQTT_Client.loop() within void loop() {}.

For what it's worth, I'd also recommend switching to QNEthernet

[karelv]

I had luck with defining the server ip like this:

const IPAddress MQTT_SERVER_IP(192, 168, 1, 60);

in stead of using the string notation. (I will try QNEthernet later)