Hey,
I have big problems with a NeoPixel on my PCB. The µC is an Atmega32U4 and the NeoPixel is an WS2812B. The pixel seems to work fine and the circuit should be good, but when I use the function to select a color in an if-function the color of the pixel is more green. This itself is not the problem, but when I want to turn it off, all colors are gone but green stays. If I do the same in e.g. the setup or the loop it is working.
The Values for R G B are sent from a mobilephone via usb in serial connection and this is working. I´m also getting R == 0, G == 0, B==0 but like I said the pixel stays green...
I hope you can help me..
I need this for a schoolproject and I only have time till thursday...
Greetings from bavaria !!
#include <Adafruit_NeoPixel.h>
#include <IRremote.h>
//IR
IRsend irsend;
int number = 0;
const int sendingPin = 3;
//LEDs
int LEDs[8]{ 15,14,13,12,11,10,9,8 };
//Neopixel
#define PIN 17
Adafruit_NeoPixel strip = Adafruit_NeoPixel(1, PIN, NEO_GRB + NEO_KHZ800);
//Serial
byte buffer[4] = {0,0,0,0};
int starttime = 0;
//Temperature
const long interval = 1000; //interval of the temperaturechecks
const int checkingNumber = 5; //number of checks
const int ntc = A5; //analogRead-pin
const int ntcNominal = 15000; //resistance at e.g 25°C
const int tempNominal = 25; //nominaltemperature (e.g. 25°C)
const int bCoefficient = 3528; //Beta Coefficient(B25 from the datasheet of the NTC)
const int serialResistor = 10000; //value of the serial resistor
int checks[checkingNumber]; //array variable for averaging the temperatur
float averageValue = 0; //variable for averaging the temperature
float temp; //variable for calculation (Steinhart)
float lastTemp;
unsigned long lastTempCheck = 0; //saves time of last temperaturemeasurement
int lastTempUpdate = 0;
void setup()
{
Serial.begin(9600);
//LEDs
for (int i = 0; i < 8; i++) {
pinMode(LEDs[i], OUTPUT);
}
//NTC
pinMode(ntc, INPUT);
//Neopixel
strip.begin();
strip.show();
}
void loop()
{
temperature();
serialInterface();
}
void serialInterface() {
if (Serial.available() > 0) {
while (Serial.available() < 4 && ((millis() - starttime) < 1000)) {}
for (int n = 0; n < 4; n++) { buffer[n] = Serial.read(); }
//send temperature to FP
int timeNow = millis();
if (timeNow - lastTempUpdate > 2000) {
Serial.println((int)temp);
lastTempUpdate = millis();
}
switch (buffer[0]) {
case 1:
IRremote();
break;
//LED-Light
case 2:
lightLED();
break;
//RGB
case 3:
neoPixel();
break;
}
}
}
//lights up the 8 LEDs attached to the GPIOs
void lightLED() {
for (int i = 0; i <= 7; i++) {
digitalWrite(LEDs[i], bitRead(buffer[1], i));
}
}
//lights up the Neopixel
void neoPixel() {
strip.setPixelColor(0, buffer[1], buffer[2], buffer[3]);
strip.show();
delay(10);
}
//sends signal via IR-LED
void IRremote() {
//sending selected hex-code
switch (buffer[1]) {
// ON
case 1:
irsend.sendNEC(0xFFB04F, 32);
break;
// OFF
case 2:
irsend.sendNEC(0xFFF807, 32);
break;
// RED
case 3:
irsend.sendNEC(0xFF9867, 32);
break;
// GREEN
case 4:
irsend.sendNEC(0xFFD827, 32);
break;
// BLUE
case 5:
irsend.sendNEC(0xFF8877, 32);
break;
}
}
//checking the NTC and sending temperature to the FP
void temperature() {
int timeNow = millis();
if (timeNow - lastTempCheck > 100) {
//N readouts with a short delay
for (int i = 0; i < checkingNumber; i++)
{
checks[i] = analogRead(ntc);
delay(10);
}
//averaging of the measured values
averageValue = 0;
for (int i = 0; i < checkingNumber; i++)
{
averageValue += checks[i];
}
averageValue /= checkingNumber;
//transform measured value (voltage) into resistance
averageValue = 1023 / averageValue - 1;
averageValue = serialResistor / averageValue;
//convert measured results
temp = averageValue / ntcNominal; // (R/Ro)
temp = log(temp); // ln(R/Ro)
temp /= bCoefficient; // 1/B * ln(R/Ro)
temp += 1.0 / (tempNominal + 273.15); // + (1/To)
temp = 1.0 / temp; // invert
temp -= 273.15;
lastTempCheck = timeNow;
lastTemp = temp;
}
}
