Project Development - Embedded Programming

I have done a lot of research as result of this topic learning everything from hex code to the International Space Station. Here is a link to my resources.

Work Flow

Once I was able to access the ISS-Above data stream, I knew that I could use this information for my needs Click here to see how I access the ISS-Above data stream.

I want my project to flash blue leds when the Internation Space Station flies over our location. ISS-Above "tells" PiGlow to turn on 0xB - eleventh LED or white LED when ISS is above our location. I will test for B and turn on my LEDs to blue. I can't use delay function because the Fab arduino needs to contiuosly monitor the Raspberry Pi and ISS-Above. I need to use the milli function and amchine state.

Neopixels and Machine State

I begin by soldeing jumpers leads to single neopixel. This includes power, ground and signal

I connected the red to power , green to ground and signal to pin 6 on the Arduino.

Downloaded Adafruit Neopixel library

Installed the Adafruit library by selecting zip library files in Arduino.

I open File --> Examples --> Adafruit Neopixel --> simple.

I changed the number of pixels from 16 to 1 and then uploaded and ran the program.

Next, I open File --> Examples --> Adafruit Neopixel --> strandTest file

I changed the number of pixels from 16 to 1 and then uploaded and ran the program.

While I could set the color of the neopixel this program uses delay commands.

I spoke to Dr. Harris about this issue. He suggested this adafruit tutorial on milli fucntion and machine state

I began with a program to blink a light without using a delay instead you use the milli function and machine state.

Below is section of the code:

// check to see if it's time to change the state of the LED

unsigned long currentMillis = millis();

if((ledState == HIGH) && (currentMillis - previousMillis >= OnTime))

{

if((ledState == HIGH) && (currentMillis - previousMillis >= OnTime))

{

ledState = LOW; // Turn it off

previousMillis = currentMillis; // Remember the time

digitalWrite(ledPin, ledState); // Update the actual LED

}

else if ((ledState == LOW) && (currentMillis - previousMillis >= OffTime))

{

ledState = HIGH; // turn it on

previousMillis = currentMillis; // Remember the time

digitalWrite(ledPin, ledState); // Update the actual LED

}

The final code below combines I2C Code, Machine State with Neopixels. This is a portion of the code.

void receiveEvent(int howMany) { <---- I2C code

while (0 < Wire.available()) { // loop through all but the last

unsigned char c = Wire.read(); // receive byte as a character

Serial.print(c,HEX); // print the character

if (c == 0x0B) //white

{

if((ledState == HIGH) && (currentMillis - previousMillis >= OnTime)) Machine State code

{

ledState = LOW; // Turn it off

previousMillis = currentMillis; // Remember the time

digitalWrite(ledPin, ledState); // Update the actual

for (int i=0;iNeopixel or LED code

pixels.setPixelColor(i, pixels.Color(0,0,0)); // Moderately bright blue color.

}

}

else if ((ledState == LOW) && (currentMillis - previousMillis >= OffTime))

{

ledState = HIGH; // turn it on

previousMillis = currentMillis; // Remember the time

digitalWrite(ledPin, ledState); // Update the actual LED

for (int i=0;i

pixels.setPixelColor(0, pixels.Color(0,0,255)); //neo pixel code make it blue

pixels.show(); //neo pixel code

}

Final Assembly

Once I finished the programming, I soldered a 8 LED neopixel stick.

I connected LED stick to an arduino and I uploaded NeoPixel/Machine State file and I confirmed the LED sticks worked

I laser cut 8 holes into the "my book"

I put 8 transparent glue sticks into holes

I then added the LED neopixel stick to a my "book"

I aligned each glue stick above each pixel

Videos

• Blinking a LED Light using delay.
• Blinking a LED light using machine state.
• Blinking alternating LEDs using machine state.
• Turning on a multiple Leds

Exercise Files

• Strand test with 8 pixels
• Machine state controlling LED