MQTT in pure data

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Course Documentation "Communicating Bodies"

https://www.kobakant.at/DIY/?p=9133

http://hyperdramatik.net/mediawiki/index.php?title=Communicating_Bodies


PD Patch

xxx


Arduino Code for Spaghettimonster

/*
  a_MQTT_send6AnalogAsString_forPD
*/

#include <WiFi.h>
#include <MQTT.h>

const char ssid[] = "ladenlokal";
const char pass[] = "puppe2010";

#define totalLegs 6
int analogLegs[] = {36, 39, 34, 35, 32, 33};
int vals[totalLegs];
int avgs[totalLegs];
int samplesize = 5;

String str;

WiFiClient net;
MQTTClient client;

unsigned long lastMillis = 0;

void connect() {
  Serial.print("checking wifi...");
  while (WiFi.status() != WL_CONNECTED) {
    Serial.print(".");
    delay(1000);
  }

  Serial.print("\nconnecting...");
  while (!client.connect("arduino", "", "")) {
    Serial.print(".");
    delay(1000);
  }

  Serial.println("\nconnected!");

  client.subscribe("/hello");
  // client.unsubscribe("/hello");
}

void messageReceived(String &topic, String &payload) {
  Serial.println("incoming: " + topic + " - " + payload);
}

void setup() {
  Serial.begin(115200);
  WiFi.begin(ssid, pass);

  // Note: Local domain names (e.g. "Computer.local" on OSX) are not supported by Arduino.
  // You need to set the IP address directly.
  client.begin("192.168.236.90", 2883, net);
  client.onMessage(messageReceived);

  connect();
}

void loop() {
  client.loop();
  delay(10);  // <- fixes some issues with WiFi stability

  if (!client.connected()) {
    connect();
  }

  // publish a message roughly every second.
  if (millis() - lastMillis > 1000) {
    lastMillis = millis();

 for (int i = 0; i < totalLegs; i++) {
      // read analog pins
      vals[i] = analogRead(analogLegs[i]);
      // take avarage of the sample size
      avgs[i] = (avgs[i] * (samplesize - 1) + vals[i]) / samplesize;

      str = str + " " + String(104);
    }

    // after you cycle through all the pins, publish the readings as list to the MQTT
    client.publish("/group0/person1/", str);
    str = "";

    //// communicate from the serial
    Serial.print(vals[0]);
    Serial.print(" ");
    Serial.print(vals[1]);
    Serial.print(" ");
    Serial.print(vals[2]);
    Serial.print(" ");
    Serial.print(vals[3]);
    Serial.print(" ");
    Serial.print(vals[4]);
    Serial.print(" ");
    Serial.println(vals[5]);   
  }
}