hi there,
I have been using an arduino mega and the Adafruit_TCS34725 (colour sensor) for the last few weeks and it has been working fine. Now I am trying to use the same code on an arduino nano (clone) and I am repeatedly getting errors.
I’m wondering if there are problems with not using the SCL and SDA inputs of the mega and using the nanos A4 and A5 pins instead??
For now I am just using the Adafruit_TCS34725 library code, no additions or changes.
#include <Wire.h>
#include "Adafruit_TCS34725.h"
// Pick analog outputs, for the UNO these three work well
// use ~560 ohm resistor between Red & Blue, ~1K for green (its brighter)
#define redpin 3
#define greenpin 5
#define bluepin 6
// for a common anode LED, connect the common pin to +5V
// for common cathode, connect the common to ground
// set to false if using a common cathode LED
#define commonAnode true
// our RGB -> eye-recognized gamma color
byte gammatable[256];
Adafruit_TCS34725 tcs = Adafruit_TCS34725(TCS34725_INTEGRATIONTIME_50MS, TCS34725_GAIN_4X);
void setup() {
Serial.begin(9600);
Serial.println("Color View Test!");
if (tcs.begin()) {
Serial.println("Found sensor");
} else {
Serial.println("No TCS34725 found ... check your connections");
while (1); // halt!
}
// use these three pins to drive an LED
pinMode(redpin, OUTPUT);
pinMode(greenpin, OUTPUT);
pinMode(bluepin, OUTPUT);
// thanks PhilB for this gamma table!
// it helps convert RGB colors to what humans see
for (int i=0; i<256; i++) {
float x = i;
x /= 255;
x = pow(x, 2.5);
x *= 255;
if (commonAnode) {
gammatable[i] = 255 - x;
} else {
gammatable[i] = x;
}
//Serial.println(gammatable[i]);
}
}
void loop() {
uint16_t clear, red, green, blue;
tcs.setInterrupt(false); // turn on LED
delay(60); // takes 50ms to read
tcs.getRawData(&red, &green, &blue, &clear);
tcs.setInterrupt(true); // turn off LED
Serial.print("C:\t"); Serial.print(clear);
Serial.print("\tR:\t"); Serial.print(red);
Serial.print("\tG:\t"); Serial.print(green);
Serial.print("\tB:\t"); Serial.print(blue);
// Figure out some basic hex code for visualization
uint32_t sum = clear;
float r, g, b;
r = red; r /= sum;
g = green; g /= sum;
b = blue; b /= sum;
r *= 256; g *= 256; b *= 256;
Serial.print("\t");
Serial.print((int)r, HEX); Serial.print((int)g, HEX); Serial.print((int)b, HEX);
Serial.println();
//Serial.print((int)r ); Serial.print(" "); Serial.print((int)g);Serial.print(" "); Serial.println((int)b );
analogWrite(redpin, gammatable[(int)r]);
analogWrite(greenpin, gammatable[(int)g]);
analogWrite(bluepin, gammatable[(int)b]);
}
and here is the error that I have been getting.
Sketch uses 6980 bytes (22%) of program storage space. Maximum is 30720 bytes.
Global variables use 753 bytes (36%) of dynamic memory, leaving 1295 bytes for local variables. Maximum is 2048 bytes.
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 1 of 10: not in sync: resp=0x00
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 2 of 10: not in sync: resp=0x00
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 3 of 10: not in sync: resp=0x00
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 4 of 10: not in sync: resp=0x00
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 5 of 10: not in sync: resp=0x00
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 6 of 10: not in sync: resp=0x00
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 7 of 10: not in sync: resp=0x00
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 8 of 10: not in sync: resp=0x00
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 9 of 10: not in sync: resp=0x00
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 10 of 10: not in sync: resp=0x00
Problem uploading to board. See http://www.arduino.cc/en/Guide/Troubleshooting#upload for suggestions.
I hope this is a good question, have been searching online, but alot of similar posts seem to be unresolved, or with fixes that didnt apply.
Thanks for your time in advance.