I am pairing the Adafruit E-Z-Link with a Adafruit 24 pixel NeoPixel ring. I am retrofitting the StrandTest example (all-cred to Adafruit) to accept commands sent over bluetooth. The code works nicely, however I am seeing an unexpected behavior. When I connect to to the E-Z-Link from a bluetooth client (I am using Digi X-CTU client on Windows 8), the device quickly resets to initial state and accepts commands. I tried the same thing with some custom C# code too with same results. I know it resets because I can see that the color patterns reverts back from one mode to the default mode.
For example, when I connect I can toggle between the different color demos on demand. Once I disconnect the client and reconnect the client to the E-Z-Link device, the execution of the sketch I uploaded resets back to default case. Is this as expected or am I at fault and the code is somehow toggling on new connection?
I am attaching the code for completeness.
Code: Select all
#include <Adafruit_NeoPixel.h>
#include "SoftwareSerial.h"
#define PIN 6
//constants
const int TX_BT = 10;
const int RX_BT = 11;
byte g_command = '0';
int g_brightness = 15;
// Parameter 1 = number of pixels in strip
// Parameter 2 = Arduino pin number (most are valid)
// Parameter 3 = pixel type flags, add together as needed:
// NEO_KHZ800 800 KHz bitstream (most NeoPixel products w/WS2812 LEDs)
// NEO_KHZ400 400 KHz (classic 'v1' (not v2) FLORA pixels, WS2811 drivers)
// NEO_GRB Pixels are wired for GRB bitstream (most NeoPixel products)
// NEO_RGB Pixels are wired for RGB bitstream (v1 FLORA pixels, not v2)
Adafruit_NeoPixel strip = Adafruit_NeoPixel(24, PIN, NEO_GRB + NEO_KHZ800);
// IMPORTANT: To reduce NeoPixel burnout risk, add 1000 uF capacitor across
// pixel power leads, add 300 - 500 Ohm resistor on first pixel's data input
// and minimize distance between Arduino and first pixel. Avoid connecting
// on a live circuit...if you must, connect GND first.
void setup() {
Serial.begin(9600);
//Serial.println("Serial initialized");
//Serial.println("Bluetooth initialized");
strip.begin();
strip.setBrightness(g_brightness);
strip.show(); // Initialize all pixels to 'off'
}
void loop() {
readBluetooth();
if(g_command == '0' )
// Some example procedures showing how to display to the pixels:
colorWipe(strip.Color(255, 0, 0), 50); // Red
else if(g_command == '1' )
colorWipe(strip.Color(0, 255, 0), 50); // Green
else if(g_command == '2' )
colorWipe(strip.Color(0, 0, 255), 50); // Blue
// Send a theater pixel chase in...
else if(g_command == '3' )
theaterChase(strip.Color(127, 127, 127), 50); // White
else if(g_command == '4' )
theaterChase(strip.Color(127, 0, 0), 50); // Red
else if(g_command == '5' )
theaterChase(strip.Color( 0, 0, 127), 50); // Blue
else if(g_command == '6' )
rainbow(20);
else if(g_command == '7' )
rainbowCycle(20);
else if(g_command == '8' )
theaterChaseRainbow(50);
else if(g_command == '-' )
g_brightness--;
else if(g_command == '+' )
g_brightness++;
}
// connection handling
void readBluetooth()
{
while (Serial.available())
{
g_command = Serial.read();
}
}
// Fill the dots one after the other with a color
void colorWipe(uint32_t c, uint8_t wait) {
for(uint16_t i=0; i<strip.numPixels(); i++) {
strip.setPixelColor(i, c);
strip.show();
delay(wait);
}
}
void rainbow(uint8_t wait) {
uint16_t i, j;
for(j=0; j<256; j++) {
for(i=0; i<strip.numPixels(); i++) {
strip.setPixelColor(i, Wheel((i+j) & 255));
}
strip.show();
delay(wait);
}
}
// Slightly different, this makes the rainbow equally distributed throughout
void rainbowCycle(uint8_t wait) {
uint16_t i, j;
for(j=0; j<256*5; j++) { // 5 cycles of all colors on wheel
for(i=0; i< strip.numPixels(); i++) {
strip.setPixelColor(i, Wheel(((i * 256 / strip.numPixels()) + j) & 255));
}
strip.show();
delay(wait);
}
}
//Theatre-style crawling lights.
void theaterChase(uint32_t c, uint8_t wait) {
for (int j=0; j<10; j++) { //do 10 cycles of chasing
for (int q=0; q < 3; q++) {
for (int i=0; i < strip.numPixels(); i=i+3) {
strip.setPixelColor(i+q, c); //turn every third pixel on
}
strip.show();
delay(wait);
for (int i=0; i < strip.numPixels(); i=i+3) {
strip.setPixelColor(i+q, 0); //turn every third pixel off
}
}
}
}
//Theatre-style crawling lights with rainbow effect
void theaterChaseRainbow(uint8_t wait) {
for (int j=0; j < 256; j++) { // cycle all 256 colors in the wheel
for (int q=0; q < 3; q++) {
for (int i=0; i < strip.numPixels(); i=i+3) {
strip.setPixelColor(i+q, Wheel( (i+j) % 255)); //turn every third pixel on
}
strip.show();
delay(wait);
for (int i=0; i < strip.numPixels(); i=i+3) {
strip.setPixelColor(i+q, 0); //turn every third pixel off
}
}
}
}
// Input a value 0 to 255 to get a color value.
// The colours are a transition r - g - b - back to r.
uint32_t Wheel(byte WheelPos) {
if(WheelPos < 85) {
return strip.Color(WheelPos * 3, 255 - WheelPos * 3, 0);
} else if(WheelPos < 170) {
WheelPos -= 85;
return strip.Color(255 - WheelPos * 3, 0, WheelPos * 3);
} else {
WheelPos -= 170;
return strip.Color(0, WheelPos * 3, 255 - WheelPos * 3);
}
}