Wireless LEDs with Touchdesigner, "Variable or Field 'WiFi Event' declared void"

Projects Programming
1

Hi all. Im attempting to get a sketch working that will allow me to control LEDs wirelessly with Touchdesigner. I'm using a Huzzah Feather ESP8266. When I verify the sketch, I get an error labeled "Variable or Field 'WiFi Event' declared void". Any tips?

/*
*  This sketch recieves LED data over UDP and outputs it to LEDs
*
*/
#include <WiFi.h>
#include <WiFiUdp.h>

#include <FastLED.h>
// Because conditional #includes don't work w/Arduino sketches...
#include <SPI.h>


//-- CHANGE THESE -- //
// Here's how to control the LEDs from any two pins:
#define DATAPIN 13

// How many leds in your strip?
#define NUM_LEDS 60

// WiFi network name and password:
const char * networkName = "yourNetwork";
const char * networkPswd = "yourPassword";



// Define the array of leds
CRGB leds[NUM_LEDS];
const int dataChunkSize = 3;
int maxBright = 64;
const int numOfBytes = NUM_LEDS * dataChunkSize;
int byteReturnLen = 0;
int byteReturnCounter = 0;
char inputBuffer[numOfBytes];
int led = 0;
int led_r = 0;
int led_g = 0;
int led_b = 0;


//IP address to send UDP data to:
// either use the ip address of the server or 
// a network broadcast address
const char * udpAddress = "192.168.0.20";
const int udpPort = 3333;

//Are we currently connected?
boolean connected = false;

//The udp library class
WiFiUDP udp;

void setup(){

 FastLED.addLeds<NEOPIXEL, DATAPIN>(leds, NUM_LEDS);
 FastLED.show(); 
 // Initilize hardware serial:
 Serial.begin(115200);
 
 //Connect to the WiFi network
 connectToWiFi(networkName, networkPswd);
}


// ------------------- Gama Lookup table -------------------- //
const byte dim_curve[] = {
 0,   0,   0,   0,   0,   0,   1,   1,   1,   1,   1,   1,   1,   1,   1,   1,
 1,   1,   1,   1,   1,   1,   1,   1,   1,   1,   1,   1,   1,   1,   1,   1,
 1,   2,   2,   2,   2,   2,   2,   2,   2,   3,   3,   3,   3,   3,   4,   4,
 4,   4,   4,   5,   5,   5,   5,   6,   6,   6,   6,   7,   7,   7,   7,   8,
 8,   8,   9,   9,   9,  10,  10,  10,  11,  11,  12,  12,  12,  13,  13,  14,
14,  15,  15,  15,  16,  16,  17,  17,  18,  18,  19,  19,  20,  20,  21,  22,
22,  23,  23,  24,  25,  25,  26,  26,  27,  28,  28,  29,  30,  30,  31,  32,
33,  33,  34,  35,  36,  36,  37,  38,  39,  40,  40,  41,  42,  43,  44,  45,
46,  46,  47,  48,  49,  50,  51,  52,  53,  54,  55,  56,  57,  58,  59,  60,
61,  62,  63,  64,  65,  67,  68,  69,  70,  71,  72,  73,  75,  76,  77,  78,
80,  81,  82,  83,  85,  86,  87,  89,  90,  91,  93,  94,  95,  97,  98,  99,
101, 102, 104, 105, 107, 108, 110, 111, 113, 114, 116, 117, 119, 121, 122, 124,
125, 127, 129, 130, 132, 134, 135, 137, 139, 141, 142, 144, 146, 148, 150, 151,
153, 155, 157, 159, 161, 163, 165, 166, 168, 170, 172, 174, 176, 178, 180, 182,
184, 186, 189, 191, 193, 195, 197, 199, 201, 204, 206, 208, 210, 212, 215, 217,
219, 221, 224, 226, 228, 231, 233, 235, 238, 240, 243, 245, 248, 250, 253, 255 };

void loop(){
 //only send data when connected
 if(connected){
   //processing incoming packet, must be called before reading the buffer
   udp.parsePacket();

   if(udp.read(inputBuffer, numOfBytes) > 0){
       for (int j = 0; j < NUM_LEDS; j++) { // for loop through our total led's set from above.
           led_r = constrain(dim_curve[inputBuffer[(j*dataChunkSize)]], 0, maxBright); // set each r,g, and b value through the gamma table and using offsets and multiple of three to traverse the array.
           led_g = constrain(dim_curve[inputBuffer[(j*dataChunkSize)+1]], 0, maxBright);
           led_b = constrain(dim_curve[inputBuffer[(j*dataChunkSize)+2]], 0, maxBright);

           inputBuffer[(j*dataChunkSize)] = 0;
           inputBuffer[(j*dataChunkSize) + 1] = 0;
           inputBuffer[(j*dataChunkSize) + 2] = 0;
              
           leds[j].setRGB( led_r, led_g, led_b);
         }
       }
       FastLED.show();
       udp.flush();
 }
}

void connectToWiFi(const char * ssid, const char * pwd){
 Serial.println("Connecting to WiFi network: " + String(ssid));

 // delete old config
 WiFi.disconnect(true);
 //register event handler
 WiFi.onEvent(WiFiEvent);
 
 //Initiate connection
 WiFi.begin(ssid, pwd);
 WiFi.setSleep(false);
 Serial.println("Waiting for WIFI connection...");
}

//wifi event handler
void WiFiEvent(WiFiEvent_t event){
   switch(event) {
     case SYSTEM_EVENT_STA_GOT_IP:
         //When connected set 
         Serial.print("WiFi connected! IP address: ");
         Serial.println(WiFi.localIP());  
         //initializes the UDP state
         //This initializes the transfer buffer
         udp.begin(WiFi.localIP(),udpPort);
         connected = true;
         break;
     case SYSTEM_EVENT_STA_DISCONNECTED:
         Serial.println("WiFi lost connection");
         connected = false;
         break;
   }
}
2

please use code tags.... >:(

did you take code that was meant for an ESP32 ?

3

Sorry about that.. forgot about code tags.

I've tried this code on both 8266 and 32.. both attempts end with the same error code during verification. Do you think this has to do with the controller I'm using or with the code itself?

4

Please include the entire error message. It is easy to do. There is a button (lower right of the IDE window) called "copy error message". Copy the error and paste into a post in code tags. Paraphrasing the error message leaves out important information.

5

I've figured out my issue as it pertains to the esp32 board. Now, when I try to upload the sketch to an esp8266 board I've receiving this error message:

Arduino: 1.8.12 (Windows 10), Board: "Adafruit Feather HUZZAH ESP8266, 80 MHz, Flash, Legacy (new can return nullptr), All SSL ciphers (most compatible), 4MB (FS:2MB OTA:~1019KB), v2 Lower Memory, Disabled, None, Only Sketch, 115200"

In file included from C:\Users\ezzeb\Desktop\Wifi-LED-Touch-master\Arduino\UDPLED\UDPLED.ino:9:0:

C:\Users\ezzeb\Documents\Arduino\libraries\FastLED/FastLED.h:14:21: note: #pragma message: FastLED version 3.003.003

#    pragma message "FastLED version 3.003.003"

                    ^

In file included from C:\Users\ezzeb\Documents\Arduino\libraries\FastLED/FastLED.h:65:0,

                from C:\Users\ezzeb\Desktop\Wifi-LED-Touch-master\Arduino\UDPLED\UDPLED.ino:9:

C:\Users\ezzeb\Documents\Arduino\libraries\FastLED/fastspi.h:130:23: note: #pragma message: No hardware SPI pins defined.  All SPI access will default to bitbanged output

#      pragma message "No hardware SPI pins defined.  All SPI access will default to bitbanged output"

                      ^

UDPLED:123:16: error: variable or field 'WiFiEvent' declared void

void WiFiEvent(WiFiEvent_t event){

               ^

UDPLED:123:16: error: 'WiFiEvent_t' was not declared in this scope

C:\Users\ezzeb\Desktop\Wifi-LED-Touch-master\Arduino\UDPLED\UDPLED.ino: In function 'void connectToWiFi(const char*, const char*)':

UDPLED:112:23: error: no matching function for call to 'WiFiClass::disconnect(bool)'

  WiFi.disconnect(true);

                      ^

C:\Users\ezzeb\Desktop\Wifi-LED-Touch-master\Arduino\UDPLED\UDPLED.ino:112:23: note: candidate is:

In file included from C:\Users\ezzeb\Desktop\Wifi-LED-Touch-master\Arduino\UDPLED\UDPLED.ino:6:0:

C:\Program Files (x86)\Arduino\libraries\WiFi\src/WiFi.h:130:9: note: int WiFiClass::disconnect()

    int disconnect(void);

        ^

C:\Program Files (x86)\Arduino\libraries\WiFi\src/WiFi.h:130:9: note:   candidate expects 0 arguments, 1 provided

UDPLED:114:8: error: 'class WiFiClass' has no member named 'onEvent'

  WiFi.onEvent(WiFiEvent);

       ^

UDPLED:114:16: error: 'WiFiEvent' was not declared in this scope

  WiFi.onEvent(WiFiEvent);

               ^

UDPLED:117:23: error: invalid conversion from 'const char*' to 'char*' [-fpermissive]

  WiFi.begin(ssid, pwd);

                      ^

In file included from C:\Users\ezzeb\Desktop\Wifi-LED-Touch-master\Arduino\UDPLED\UDPLED.ino:6:0:

C:\Program Files (x86)\Arduino\libraries\WiFi\src/WiFi.h:79:9: error:   initializing argument 1 of 'int WiFiClass::begin(char*, const char*)' [-fpermissive]

    int begin(char* ssid, const char *passphrase);

        ^

UDPLED:118:8: error: 'class WiFiClass' has no member named 'setSleep'

  WiFi.setSleep(false);

       ^

C:\Users\ezzeb\Desktop\Wifi-LED-Touch-master\Arduino\UDPLED\UDPLED.ino: At global scope:

UDPLED:123:16: error: variable or field 'WiFiEvent' declared void

void WiFiEvent(WiFiEvent_t event){

               ^

UDPLED:123:16: error: 'WiFiEvent_t' was not declared in this scope

exit status 1
variable or field 'WiFiEvent' declared void

This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.

via this code:

/*
 *  This sketch recieves LED data over UDP and outputs it to LEDs
 *
 */
#include <WiFi.h>
#include <WiFiUdp.h>
#include <ESP8266wifi.h>
#include <FastLED.h>
// Because conditional #includes don't work w/Arduino sketches...
#include <SPI.h>


//-- CHANGE THESE -- //
// Here's how to control the LEDs from any two pins:
#define DATAPIN 13

// How many leds in your strip?
#define NUM_LEDS 60

// WiFi network name and password:
const char * networkName = "Mal'Ganis";
const char * networkPswd = "2069497907";



// Define the array of leds
CRGB leds[NUM_LEDS];
const int dataChunkSize = 3;
int maxBright = 64;
const int numOfBytes = NUM_LEDS * dataChunkSize;
int byteReturnLen = 0;
int byteReturnCounter = 0;
char inputBuffer[numOfBytes];
int led = 0;
int led_r = 0;
int led_g = 0;
int led_b = 0;


//IP address to send UDP data to:
// either use the ip address of the server or 
// a network broadcast address
const char * udpAddress = "255.255.255.255";
const int udpPort = 3333;

//Are we currently connected?
boolean connected = false;

//The udp library class
WiFiUDP udp;

void setup(){

  FastLED.addLeds<NEOPIXEL, DATAPIN>(leds, NUM_LEDS);
  FastLED.show(); 
  // Initilize hardware serial:
  Serial.begin(115200);
  
  //Connect to the WiFi network
  connectToWiFi(networkName, networkPswd);
}


// ------------------- Gama Lookup table -------------------- //
const byte dim_curve[] = {
  0,   0,   0,   0,   0,   0,   1,   1,   1,   1,   1,   1,   1,   1,   1,   1,
  1,   1,   1,   1,   1,   1,   1,   1,   1,   1,   1,   1,   1,   1,   1,   1,
  1,   2,   2,   2,   2,   2,   2,   2,   2,   3,   3,   3,   3,   3,   4,   4,
  4,   4,   4,   5,   5,   5,   5,   6,   6,   6,   6,   7,   7,   7,   7,   8,
  8,   8,   9,   9,   9,  10,  10,  10,  11,  11,  12,  12,  12,  13,  13,  14,
 14,  15,  15,  15,  16,  16,  17,  17,  18,  18,  19,  19,  20,  20,  21,  22,
 22,  23,  23,  24,  25,  25,  26,  26,  27,  28,  28,  29,  30,  30,  31,  32,
 33,  33,  34,  35,  36,  36,  37,  38,  39,  40,  40,  41,  42,  43,  44,  45,
 46,  46,  47,  48,  49,  50,  51,  52,  53,  54,  55,  56,  57,  58,  59,  60,
 61,  62,  63,  64,  65,  67,  68,  69,  70,  71,  72,  73,  75,  76,  77,  78,
 80,  81,  82,  83,  85,  86,  87,  89,  90,  91,  93,  94,  95,  97,  98,  99,
101, 102, 104, 105, 107, 108, 110, 111, 113, 114, 116, 117, 119, 121, 122, 124,
125, 127, 129, 130, 132, 134, 135, 137, 139, 141, 142, 144, 146, 148, 150, 151,
153, 155, 157, 159, 161, 163, 165, 166, 168, 170, 172, 174, 176, 178, 180, 182,
184, 186, 189, 191, 193, 195, 197, 199, 201, 204, 206, 208, 210, 212, 215, 217,
219, 221, 224, 226, 228, 231, 233, 235, 238, 240, 243, 245, 248, 250, 253, 255 };

void loop(){
  //only send data when connected
  if(connected){
    //processing incoming packet, must be called before reading the buffer
    udp.parsePacket();

    if(udp.read(inputBuffer, numOfBytes) > 0){
        for (int j = 0; j < NUM_LEDS; j++) { // for loop through our total led's set from above.
            led_r = constrain(dim_curve[inputBuffer[(j*dataChunkSize)]], 0, maxBright); // set each r,g, and b value through the gamma table and using offsets and multiple of three to traverse the array.
            led_g = constrain(dim_curve[inputBuffer[(j*dataChunkSize)+1]], 0, maxBright);
            led_b = constrain(dim_curve[inputBuffer[(j*dataChunkSize)+2]], 0, maxBright);

            inputBuffer[(j*dataChunkSize)] = 0;
            inputBuffer[(j*dataChunkSize) + 1] = 0;
            inputBuffer[(j*dataChunkSize) + 2] = 0;
               
            leds[j].setRGB( led_r, led_g, led_b);
          }
        }
        FastLED.show();
        udp.flush();
  }
}

void connectToWiFi(const char * ssid, const char * pwd){
  Serial.println("Connecting to WiFi network: " + String(ssid));

  // delete old config
  WiFi.disconnect(true);
  //register event handler
  WiFi.onEvent(WiFiEvent);
  
  //Initiate connection
  WiFi.begin(ssid, pwd);
  WiFi.setSleep(false);
  Serial.println("Waiting for WIFI connection...");
}

//wifi event handler
void WiFiEvent(WiFiEvent_t event){
    switch(event) {
      case SYSTEM_EVENT_STA_GOT_IP:
          //When connected set 
          Serial.print("WiFi connected! IP address: ");
          Serial.println(WiFi.localIP());  
          //initializes the UDP state
          //This initializes the transfer buffer
          udp.begin(WiFi.localIP(),udpPort);
          connected = true;
          break;
      case SYSTEM_EVENT_STA_DISCONNECTED:
          Serial.println("WiFi lost connection");
          connected = false;
          break;
    }
}