thermal camera display

Projects Programming
1

I have an AMG8833 thermal sensor with an arduino mega and a ILI9341 TFT 2.8" shield.

I have installed all the correct libraries and have adapted the Sheild screen for Mega by soldering closed the ICSP and splitting the 11 - 13.
I have tested the screen with some examples and it works fine and I tested the pixel array of the sensor in the serial monitor and both work fine independently.

However, when I run the Thermal_cam example, nothing is displayed on the screen. What could be the problem here? I am a newbie so am not totally confident with reading the code within the example and understanding everything it is doing. I am frantically undertaking tutorials to try to get better at this.

2

This is the programming section, but you don't appear to have posted your code.

3

Code

/***************************************************************************
  This is a library for the AMG88xx GridEYE 8x8 IR camera

  This sketch makes a 64 pixel thermal camera with the GridEYE sensor
  and a 128x128 tft screen https://www.adafruit.com/product/2088

  Designed specifically to work with the Adafruit AMG88 breakout
  ----> http://www.adafruit.com/products/3538

  These sensors use I2C to communicate. The device's I2C address is 0x69

  Adafruit invests time and resources providing this open source code,
  please support Adafruit andopen-source hardware by purchasing products
  from Adafruit!

  Written by Dean Miller for Adafruit Industries.
  BSD license, all text above must be included in any redistribution
 ***************************************************************************/

#include <Adafruit_GFX.h>    // Core graphics library
#include <Adafruit_ST7735.h> // Hardware-specific library
#include <SPI.h>

#include <Wire.h>
#include <Adafruit_AMG88xx.h>

#define TFT_CS     10 //chip select pin for the TFT screen
#define TFT_RST    9  // you can also connect this to the Arduino reset
                      // in which case, set this #define pin to 0!
#define TFT_DC     8

//low range of the sensor (this will be blue on the screen)
#define MINTEMP 22

//high range of the sensor (this will be red on the screen)
#define MAXTEMP 34

//the colors we will be using
const uint16_t camColors[] = {0x480F,
0x400F,0x400F,0x400F,0x4010,0x3810,0x3810,0x3810,0x3810,0x3010,0x3010,
0x3010,0x2810,0x2810,0x2810,0x2810,0x2010,0x2010,0x2010,0x1810,0x1810,
0x1811,0x1811,0x1011,0x1011,0x1011,0x0811,0x0811,0x0811,0x0011,0x0011,
0x0011,0x0011,0x0011,0x0031,0x0031,0x0051,0x0072,0x0072,0x0092,0x00B2,
0x00B2,0x00D2,0x00F2,0x00F2,0x0112,0x0132,0x0152,0x0152,0x0172,0x0192,
0x0192,0x01B2,0x01D2,0x01F3,0x01F3,0x0213,0x0233,0x0253,0x0253,0x0273,
0x0293,0x02B3,0x02D3,0x02D3,0x02F3,0x0313,0x0333,0x0333,0x0353,0x0373,
0x0394,0x03B4,0x03D4,0x03D4,0x03F4,0x0414,0x0434,0x0454,0x0474,0x0474,
0x0494,0x04B4,0x04D4,0x04F4,0x0514,0x0534,0x0534,0x0554,0x0554,0x0574,
0x0574,0x0573,0x0573,0x0573,0x0572,0x0572,0x0572,0x0571,0x0591,0x0591,
0x0590,0x0590,0x058F,0x058F,0x058F,0x058E,0x05AE,0x05AE,0x05AD,0x05AD,
0x05AD,0x05AC,0x05AC,0x05AB,0x05CB,0x05CB,0x05CA,0x05CA,0x05CA,0x05C9,
0x05C9,0x05C8,0x05E8,0x05E8,0x05E7,0x05E7,0x05E6,0x05E6,0x05E6,0x05E5,
0x05E5,0x0604,0x0604,0x0604,0x0603,0x0603,0x0602,0x0602,0x0601,0x0621,
0x0621,0x0620,0x0620,0x0620,0x0620,0x0E20,0x0E20,0x0E40,0x1640,0x1640,
0x1E40,0x1E40,0x2640,0x2640,0x2E40,0x2E60,0x3660,0x3660,0x3E60,0x3E60,
0x3E60,0x4660,0x4660,0x4E60,0x4E80,0x5680,0x5680,0x5E80,0x5E80,0x6680,
0x6680,0x6E80,0x6EA0,0x76A0,0x76A0,0x7EA0,0x7EA0,0x86A0,0x86A0,0x8EA0,
0x8EC0,0x96C0,0x96C0,0x9EC0,0x9EC0,0xA6C0,0xAEC0,0xAEC0,0xB6E0,0xB6E0,
0xBEE0,0xBEE0,0xC6E0,0xC6E0,0xCEE0,0xCEE0,0xD6E0,0xD700,0xDF00,0xDEE0,
0xDEC0,0xDEA0,0xDE80,0xDE80,0xE660,0xE640,0xE620,0xE600,0xE5E0,0xE5C0,
0xE5A0,0xE580,0xE560,0xE540,0xE520,0xE500,0xE4E0,0xE4C0,0xE4A0,0xE480,
0xE460,0xEC40,0xEC20,0xEC00,0xEBE0,0xEBC0,0xEBA0,0xEB80,0xEB60,0xEB40,
0xEB20,0xEB00,0xEAE0,0xEAC0,0xEAA0,0xEA80,0xEA60,0xEA40,0xF220,0xF200,
0xF1E0,0xF1C0,0xF1A0,0xF180,0xF160,0xF140,0xF100,0xF0E0,0xF0C0,0xF0A0,
0xF080,0xF060,0xF040,0xF020,0xF800,};

Adafruit_ST7735 tft = Adafruit_ST7735(TFT_CS,  TFT_DC, TFT_RST);

Adafruit_AMG88xx amg;
unsigned long delayTime;
float pixels[AMG88xx_PIXEL_ARRAY_SIZE];
uint16_t displayPixelWidth, displayPixelHeight;

void setup() {
  Serial.begin(9600);
    Serial.println(F("AMG88xx thermal camera!"));

    tft.initR(INITR_144GREENTAB);   // initialize a ST7735S chip, black tab
    tft.fillScreen(ST7735_BLACK);

    displayPixelWidth = tft.width() / 8;
    displayPixelHeight = tft.height() / 8;

    //tft.setRotation(3);
    
    bool status;
    
    // default settings
    status = amg.begin();
    if (!status) {
        Serial.println("Could not find a valid AMG88xx sensor, check wiring!");
        while (1);
    }
    
    Serial.println("-- Thermal Camera Test --");
    delay(100); // let sensor boot up

}

void loop() {
  //read all the pixels
  amg.readPixels(pixels);

  for(int i=0; i<AMG88xx_PIXEL_ARRAY_SIZE; i++){
    uint8_t colorIndex = map(pixels[i], MINTEMP, MAXTEMP, 0, 255);
    colorIndex = constrain(colorIndex, 0, 255);

    //draw the pixels!
    tft.fillRect(displayPixelHeight * floor(i / 8), displayPixelWidth * (i % 8),
        displayPixelHeight, displayPixelWidth, camColors[colorIndex]);
  }
}
4

by soldering closed the ICSP and splitting the 11 - 13.

I'm sure you know what this means. Given the lack of responses, I'm going to go out on a limb and suggest that you are the ONLY one that knows what the heck that means.

I have tested the screen with some examples and it works fine

Before or after doing whatever it is you did above?

I tested the pixel array of the sensor in the serial monitor

I have no idea what this means. The Serial Monitor application doesn't HAVE a sensor, with or without a pixel array.

    bool status;
   
    // default settings
    status = amg.begin();

A real programmer would have declared the variable and valued it using one statement.

float pixels[AMG88xx_PIXEL_ARRAY_SIZE];

float? Care to share what you were smoking?

    uint8_t colorIndex = map(pixels[i], MINTEMP, MAXTEMP, 0, 255);

What, EXACTLY, is in pixels[ i ] at this point? What, EXACTLY, is in colorIndex after this statement is executed?

    tft.fillRect(displayPixelHeight * floor(i / 8), displayPixelWidth * (i % 8),
        displayPixelHeight, displayPixelWidth, camColors[colorIndex]);

What, EXACTLY, is camColors[colorIndex]? What value is passed to the fillRect() function is colorIndex is not between 0 and 256?

5

The code came in the library for the thermal camera. In the examples. I guess this problem is not suitable for a forum. I will try to find someone in the real world

6

I guess this problem is not suitable for a forum.

You are trying to run before you can even crawl. You have started a difficult project without having the necessary background, and can't communicate what you have done so far in a way that make sense to anyone.

Start with the simple examples that come with the Arduino, in order to learn the language and the special features of the Arduino. Learn how to blink an LED, read a button, a voltage and a sensor.

Then learn how to use that display. It is not enough that it "works" when you run an example. You need to understand the code before you can begin to figure out why the code doesn't work.