Problems using OSC and fastLED at the same time

Using Arduino Interfacing w/ Software on the Computer
1

Hi,

I have a BNo055 gyro/accelorometer/magnetometer and an WS2812B LED strip connected to the same board.

I am having problems making the two portions of this code work at the same time. The BN0055 IMU is able to send the data via OSC perfectly if I comment out the LED loop and the LED strip works perfectly if I comment out the OSC data. At first I thought the problem had to do with the delay() function in the fastLED code, but even after I replaced that I am still unable to make it work. The code loads onto the board without a hitch but it freezes the device. Any help would be appreciated.

void loop() {
  
//Gyroscope, acceleorometer and magnetometer
  sensors_event_t event;
  sendCount++;

  if (sendCount > 1000) {
   

    imu::Vector<3> magnetometer = bno.getVector(Adafruit_BNO055::VECTOR_MAGNETOMETER);
    imu::Vector<3> linearAccel = bno.getVector(Adafruit_BNO055::VECTOR_LINEARACCEL);
    bno.getEvent(&event);

    sendViaOSC(event.orientation.x, event.orientation.y, event.orientation.z, linearAccel.x(), linearAccel.y(), linearAccel.z(), magnetometer.x(), magnetometer.y(), magnetometer.z());
    sendCount = 0;
  }

//LED strip WS2812B

  currentMillis = millis();
  if (currentMillis - startMillis >= period) {
    startMillis = currentMillis;
    leds[x - 4] = CRGB::Black;
    x++;
    leds[x].setRGB(255, 255, 255);
    FastLED.show();
    if (x >= NUM_LEDS) x = 0;
  }

}
2

I have no idea what OSC is. Oscillator? Oscilloscope? ...

Posting your full code might also help people to help you.

If sendViaOsc relies on interrupts, you will have a problem as neopixels are timing sensitive and for that reason interrupts are disabled during FastLed.show().

3

Hi,

Sorry, this is one of my first posts on this forum. OSC stands for Open Sound Control in this case -communication protocol using Wifi. Here is the full code:

unsigned long startMillis;
unsigned long currentMillis;
const unsigned long period = 20;
int x;

#define LED_PIN     18
//#define CLOCK_PIN 4
#define NUM_LEDS    111
#define LED_TYPE    WS2812B
#define COLOR_ORDER GRB
#define BRIGHTNESS  64

CRGB leds[NUM_LEDS];

// ESP32 WiFi
#include <WiFi.h>

// Secrets file
#include "secrets.h"

// BNO055 / Adafruit Sensor library
#include <Adafruit_Sensor.h>
#include <Adafruit_BNO055.h>

#define BNO055_ADDRESS 0x28
//BNO055 is by standard for the fusion board on 0x28
Adafruit_BNO055 bno = Adafruit_BNO055(55, BNO055_ADDRESS);

// OSC Messaging
#include <OSCMessage.h>  /// https://github.com/CNMAT/OSC
#include <OSCBundle.h>  /// https://github.com/CNMAT/OSC

unsigned int localPort = 8888;
int sendCount;
int count;
int lastEntry;
const IPAddress outIp(SECRET_IP);
WiFiUDP udp;

#define SERIAL_SPEED 115200
#define VERSION 0.1




void setup()  {



 startMillis = millis();

 pinMode(LED_PIN, OUTPUT);
 FastLED.addLeds<WS2812, LED_PIN, GRB>(leds, NUM_LEDS).setCorrection( TypicalLEDStrip );
 FastLED.setBrightness(BRIGHTNESS);
 //  fill_solid(leds, NUM_LEDS, CRGB::Blue);
 //  FastLED.show();
 x = 0;

 Serial.begin(SERIAL_SPEED);
 while (!Serial) {
   //wait for Serial to start up
 }

 //Try to connect to the Wifi netowrk provided in secrets
 Serial.print("OSC IMU ");
 Serial.println(VERSION);
 Serial.println();
 Serial.print("Connecting to ");
 Serial.println(SECRET_SSID);

 WiFi.begin(SECRET_SSID, SECRET_PASSWORD);

 while (WiFi.status() != WL_CONNECTED) {
   delay(500);
   Serial.print('.');
 }
 //
 Serial.println();
 Serial.print("Success! Connected, IP Address is ");
 Serial.println(WiFi.localIP());
 //
 Serial.println("\nStarting connection to server...");
 // if you get a connection, report back via serial:
 udp.begin(localPort);


 //Now try to find the BNO055 sensor
 if (bno.begin()) {
   Serial.print("Found BNO055 on I2C address 0x");
   Serial.println(BNO055_ADDRESS, HEX);
 } else {
   /* There was a problem detecting the BNO055 ... check your connections */
   Serial.print("Ooops, no BNO055 detected ... Check your wiring or I2C ADDR!");
   while (1);
 }
 bno.setExtCrystalUse(true);


}


void loop() {

 //Gyroscope, acceleorometer and magnetometer
 sensors_event_t event;
 sendCount++;

 if (sendCount > 1000) {


   imu::Vector<3> magnetometer = bno.getVector(Adafruit_BNO055::VECTOR_MAGNETOMETER);
   imu::Vector<3> linearAccel = bno.getVector(Adafruit_BNO055::VECTOR_LINEARACCEL);
   bno.getEvent(&event);
   sendViaOSC(event.orientation.x, event.orientation.y, event.orientation.z, linearAccel.x(), linearAccel.y(), linearAccel.z(), magnetometer.x(), magnetometer.y(), magnetometer.z());
   sendCount = 0;
 }

 //LED strip WS2812B

 currentMillis = millis();
 if (currentMillis - startMillis >= period) {
   startMillis = currentMillis;
   leds[x - 4] = CRGB::Black;
   x++;
   leds[x].setRGB(255, 255, 255);
   FastLED.show();
   if (x >= NUM_LEDS) x = 0;
 }

}


void sendViaOSC(float gyroX, float gyroY, float gyroZ, float acX, float acY, float acZ, float oX, float oY, float oZ) {

 OSCMessage msg("/oscimu");
 msg.add((int32_t)gyroX);
 msg.add((int32_t)gyroY);
 msg.add((int32_t)gyroZ);
 msg.add((int32_t)acX);
 msg.add((int32_t)acY);
 msg.add((int32_t)acZ);
 msg.add((int32_t)oX);
 msg.add((int32_t)oY);
 msg.add((int32_t)oZ);
 //send out
 udp.beginPacket(outIp, SECRET_OUTPORT);
 msg.send(udp);
 udp.endPacket();
 msg.empty();
 //  sendCount = 0;
}
4

Sorry, I have no idea where this can go wrong.

5