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derived from http://thierrydphotographe.free.fr/index.php/2023/03/13/thermal-camera-for-android-diy-do-it-yourself/
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| //Version 1.02 | |
| #include <WiFi.h> | |
| #include <Adafruit_MLX90640.h> | |
| Adafruit_MLX90640 mlx; | |
| //#include <U8g2lib.h> | |
| /* | |
| #define SDA_PIN 41 | |
| #define SCL_PIN 40 | |
| */ | |
| //U8G2_SSD1306_72X40_ER_F_SW_I2C u8g2(U8G2_R0, /* SCL=*/ SCL_PIN, /* SDA=*/ SDA_PIN, /* reset=*/ U8X8_PIN_NONE); | |
| float frame[769]; | |
| float frameForSerial[769]; | |
| float frameTemp [768]; | |
| float Emissivity = 0.95F; | |
| TaskHandle_t xHandleUpdateFrame ; | |
| bool SerialInProgress = false; | |
| bool CaptureFrameInProgress = false; | |
| void WriteDisplay(String Str1, String Str2) { | |
| /* | |
| char buf1[30]; | |
| char buf2[30]; | |
| Str1.toCharArray(buf1,Str1.length() + 1); | |
| Str2.toCharArray(buf2,Str2.length() + 1); | |
| u8g2.clearBuffer(); | |
| u8g2.drawStr( 0, 0, buf1); | |
| u8g2.drawStr( 0, 22, buf2); | |
| u8g2.sendBuffer(); | |
| */ | |
| Serial.print(Str1); | |
| Serial.print(" "); | |
| Serial.println(Str2); | |
| } | |
| void setup() { | |
| /* | |
| u8g2.begin(); | |
| u8g2.setFont(u8g2_font_6x10_tf); | |
| u8g2.setFontRefHeightExtendedText(); | |
| u8g2.setFontDirection(0); | |
| u8g2.setDrawColor(1); | |
| u8g2.setFontPosTop(); | |
| */ | |
| //Serial.setTxBufferSize (3076); // removed? | |
| Serial.setRxBufferSize(20); | |
| Serial.begin(115200); | |
| WriteDisplay("Create a", "first array"); | |
| float Temp = 20.18; | |
| for (uint8_t h=0; h<24; h++) { | |
| Temp++; | |
| for (uint8_t w=0; w<32; w++) { frame[h*32 + w] = Temp; } | |
| } | |
| copyArray(frame, frameForSerial,769); | |
| WriteDisplay("Disable", "WIFI"); | |
| WiFi.mode(WIFI_OFF); | |
| WriteDisplay("INIT", "Serial"); | |
| WriteDisplay("INIT", "MLX90640"); | |
| xTaskCreatePinnedToCore( TaskUpdateFrame, "TaskUpdateFrame", 10000, NULL, 1, &xHandleUpdateFrame, 0); /* pin task to core 0 */ | |
| WriteDisplay("INIT", "finish"); | |
| } | |
| void loop() { | |
| if (Serial.available()) { | |
| String Data = ""; | |
| while (Serial.available()) { | |
| char Temp = Serial.read(); | |
| Data = Data + Temp; | |
| } | |
| Serial.flush(); | |
| if (Data.startsWith("SENDDATA")) { | |
| while (CaptureFrameInProgress == true) {delay(1);} | |
| SerialInProgress = true; | |
| Serial.write((byte *) &frameForSerial, 3076); | |
| SerialInProgress = false; | |
| } | |
| else if (Data.startsWith("EMISSIVITY")) { | |
| Emissivity = Data.substring(Data.indexOf("|") + 1, Data.indexOf("²") - Data.indexOf("|") - 1).toFloat(); | |
| mlx.setEmissivity(Emissivity); | |
| } | |
| else if (Data.startsWith("GETEMISSIVITY")) { Serial.print("EMISSIVITY|" + FloatToString(Emissivity, 2) + "²"); } | |
| else if (Data.startsWith("CHANGE4")) { mlx.setRefreshRate(MLX90640_4_HZ); } | |
| else if (Data.startsWith("CHANGE8")) { mlx.setRefreshRate(MLX90640_8_HZ); } | |
| else if (Data.startsWith("CHANGE16")) { mlx.setRefreshRate(MLX90640_16_HZ); } | |
| else if (Data.startsWith("HELLO4")) { mlx.setRefreshRate(MLX90640_4_HZ); Serial.print(Data); } | |
| else if (Data.startsWith("HELLO8")) { mlx.setRefreshRate(MLX90640_8_HZ); Serial.print(Data); } | |
| else if (Data.startsWith("HELLO16")) { mlx.setRefreshRate(MLX90640_16_HZ); Serial.print(Data); } | |
| else if (Data.startsWith("HELLO")) { mlx.setRefreshRate(MLX90640_8_HZ); Serial.print(Data); } | |
| } | |
| delay(5); | |
| } | |
| void TaskUpdateFrame( void *pvParameters ) { | |
| Wire.begin(6,7); // init i2C using SDA=pin6, SCL=pin7 | |
| Wire.setClock(800000L); | |
| if (! mlx.begin(MLX90640_I2CADDR_DEFAULT, &Wire)) { | |
| WriteDisplay("MLX90640", "not found!"); | |
| while (1) {delay(1000); WriteDisplay("MLX90640", "not found!");} | |
| } else { | |
| WriteDisplay("MLX90640", "init correct"); | |
| } | |
| mlx.setMode(MLX90640_INTERLEAVED); | |
| mlx.setResolution(MLX90640_ADC_18BIT); | |
| mlx.setRefreshRate(MLX90640_8_HZ); | |
| for( ;; ) | |
| { | |
| mlx.getFrame(frameTemp); | |
| copyArray(frameTemp, frame,768); | |
| float TA = mlx.getTA(); | |
| Emissivity = mlx.getEmissivity(); | |
| frame[768] = TA; | |
| while (SerialInProgress == true) {delay(1);} | |
| CaptureFrameInProgress = true; | |
| copyArray(frame, frameForSerial,769); | |
| CaptureFrameInProgress = false; | |
| vTaskDelay( pdMS_TO_TICKS( 13 ) ); | |
| } | |
| } | |
| void copyArray(float* src, float* dst, int len) { | |
| for (int i = 0; i < len; i++) { *dst++ = *src++; } | |
| } | |
| String FloatToString(float Val, byte decimal) { | |
| String Str = ""; | |
| long Tmp = 0; | |
| if (Val < 0){Str = "-"; Val = -Val;} | |
| Val = (float)Val + (float)(0.5 / pow(10, decimal)); | |
| Tmp = (long)Val; | |
| Str = Str + (String)Tmp; | |
| Val = (float)Val - (float)Tmp; | |
| if (decimal > 0){Str = Str + ".";} | |
| for (int i=0; i<decimal; i++) { | |
| Val = (float)Val * (float)10; | |
| Tmp = (long)Val; | |
| Str = Str + (String)Tmp; | |
| Val = (float)Val - (float)Tmp; | |
| } | |
| return Str; | |
| } | |
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