265 lines
7.6 KiB
Arduino
265 lines
7.6 KiB
Arduino
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#define MCP1 0x2F // Direcion del mcp1 MICS
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#define MCP2 0x2E // Direcion del mcp2 REGULADORES
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#define R1 82 //Kohm
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#define P1 100 //Kohm
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#define RES 255
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float k= (RES*(float)R1/100)/1000;
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float kr= ((float)P1*1000)/RES;
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#define RO_MICS_5525 450 //Kohm segun tablas estadisticas del fabricante
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#define RO_MICS_2710 3 //Kohm segun tablas estadisticas del fabricante
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float RS_RO_MICS_5525[22] = {
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0.72, 0.68, 0.66, 0.64, 0.63, 0.62, 0.61, 0.6, 0.59, 0.58, 0.5, 0.45, 0.41, 0.38, 0.34, 0.31, 0.29, 0.275, 0.26, 0.17, 0.12, 0.088}; //Rs/Ro
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float PPM_MICS_5525[22] = {
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1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 200, 300, 400}; //ppm
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float RS_RO_MICS_2710[10] = {
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25, 55, 90, 140, 190, 260, 330, 410, 500, 1000}; //Rs/Ro
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float PPM_MICS_2710[10] = {
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0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1, 1.5}; //ppm
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void writeMCP(byte deviceaddress, byte address, int data ) {
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if (data>RES) data=RES;
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Wire.beginTransmission(deviceaddress);
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address=(address<<4)|bitRead(data, 8) ;
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Wire.write(address);
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Wire.write(lowByte(data));
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Wire.endTransmission();
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delay(4);
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}
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int readMCP(int deviceaddress, byte address ) {
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byte rdata = 0xFF;
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int data = 0x0000;
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Wire.beginTransmission(deviceaddress);
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address=(address<<4)|B00001100;
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Wire.write(address);
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Wire.endTransmission();
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Wire.requestFrom(deviceaddress,2);
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while (!Wire.available());
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rdata = Wire.read();
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data=rdata<<8;
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while (!Wire.available());
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rdata = Wire.read();
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data=data|rdata;
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return data;
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}
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void VH_MICS(byte device, long voltage ) {
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byte data=0;
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int temp = (int)(((voltage/1.2)-1000)*k);
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if (temp>255) data=255;
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else if (temp<0) data=0;
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else data = temp;
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if (device== MICS_5525) writeMCP(MCP2, 0x00, data);
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else if (device== MICS_2710) writeMCP(MCP2, 0x01, data);
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}
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float readVH(byte device) {
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int data;
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if (device== MICS_5525) data=readMCP(MCP2, 0x00);
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else if (device== MICS_2710) data=readMCP(MCP2, 0x01);
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float voltage = (data/k + 1000)*1.2;
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return(voltage);
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}
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void RL_MICS(byte device, long resistor) {
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byte data=0x00;
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data = (byte)(resistor/kr);
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if (device== MICS_5525) writeMCP(MCP1, 0x00, data);
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else if (device== MICS_2710) writeMCP(MCP1, 0x01, data);
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}
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void testMICS()
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{
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float current = 0;
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// float i=0;
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float Rs = 0;
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float VL = 0;
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float RL = 0;
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float Vc = 0;
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int Rc = 10; //Ohm
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int Vcc = 5000; //mV
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float Rh = 0;
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float Vh = 0;
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/*Correccion de la tension del Heather*/
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VH_MICS(MICS_5525, 2400); //VH_MICS5525 Inicial
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digitalWrite(IO0, HIGH); //VH_MICS5525
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delay(200);
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Vc = (float)average(S2)*Vcc/1023; //mV
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current = Vc/Rc; //mA
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Rh = (readVH(MICS_5525)- Vc)/current;
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Vh = (Rh + Rc)*32;
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VH_MICS(MICS_5525, Vh); //VH_MICS5525 Corregido
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for(int i=0; i<100; i++)
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{
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delay(1000);
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/*Lectura de datos*/
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RL_MICS(MICS_5525, 100000);
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Vc = (float)average(S2)*Vcc/1023; //mV
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current = Vc/Rc; //mA
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RL = kr*readMCP(MCP1, 0x00)/1000; //Kohm
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VL = ((float)average(S0)*Vcc)/1023; //mV
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Rs = ((Vcc-VL)/VL)*RL; //Kohm
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Serial.print("Ih =");
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Serial.print(current);
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Serial.print(" mA Rs = ");
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Serial.print(Rs);
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Serial.println(" KOhm.");
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}
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digitalWrite(IO0, LOW); //VH_MICS5525
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}
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float getMICS(byte device,unsigned long time){
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float current = 0;
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// float i=0;
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float Rs = 0;
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float VL = 0;
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float RL = 0;
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float Vc = 0;
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int Rc = 10; //Ohm
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int Vcc = 5000; //mV
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float Rh = 0;
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float Vh = 0;
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if (device == MICS_5525)
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{
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/*Correccion de la tension del Heather*/
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VH_MICS(MICS_5525, 2400); //VH_MICS5525 Inicial
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digitalWrite(IO0, HIGH); //VH_MICS5525
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Serial.println("*******************");
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Serial.println("MICS5525 VH a 2.4V");
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delay(200);
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Vc = (float)average(S2)*Vcc/1023; //mV
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current = Vc/Rc; //mA
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Rh = (readVH(MICS_5525)- Vc)/current;
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Vh = (Rh + Rc)*32;
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VH_MICS(MICS_5525, Vh); //VH_MICS5525 Corregido
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Serial.print("MICS5525 correccion VH: ");
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Serial.print(Vh/1000.);
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Serial.println("V");
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Serial.println("Heating...");
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delay(5000); // Tiempo de heater!
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/*Lectura de datos*/
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RL_MICS(MICS_5525, 100000);
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digitalWrite(IO0, LOW); //VH_MICS5525 OFF para lectura
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//VH_MICS(MICS_5525, 1200); //VH_MICS5525 a 1.2V para lectura
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Serial.println("MICS5525 VH a 0V ");
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delay(time); //Tiempo de enfriamiento para lectura
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//Vc = (float)average(S2)*Vcc/1023; //mV
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//current = Vc/Rc; //mA
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RL = kr*readMCP(MCP1, 0x00)/1000; //Kohm
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VL = ((float)average(S0)*Vcc)/1023; //mV
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Rs = ((Vcc-VL)/VL)*RL; //Kohm
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Serial.print("MICS5525 Rs: ");
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Serial.print(Rs);
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Serial.println("K");
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/*Correccion de impedancia de carga*/
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if (Rs < 100)
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{
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delay(100);
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RL_MICS(MICS_5525, Rs*1000);
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RL = kr*readMCP(MCP1, 0x00)/1000; //Kohm
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VL = ((float)average(S0)*Vcc)/1023; //mV
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Rs = ((Vcc-VL)/VL)*RL; //Kohm
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}
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//digitalWrite(IO0, LOW); //VH_MICS5525 OFF
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//Serial.println("MICS5525 VH OFF ");
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/*Calculo de los resultados*/
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// if ((Rs/RO_MICS_5525)>RS_RO_MICS_5525[0]) //Valores inferiores a 1ppm
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// {
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// return(0);
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// }
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// else
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// {
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// int i=0;
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// while (RS_RO_MICS_5525[i]>Rs/RO_MICS_5525) i++;
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// float m = (PPM_MICS_5525[i] - PPM_MICS_5525[i-1])/(RS_RO_MICS_5525[i] - RS_RO_MICS_5525[i-1]); //Pendiente
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// float b = PPM_MICS_5525[i]-m*RS_RO_MICS_5525[i]; //Ordenada al origen
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// return(m*(Rs/RO_MICS_5525)+b);
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// }
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return(Rs);
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}
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else if (device == MICS_2710)
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{
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digitalWrite(IO2, LOW); //RADJ_MICS2710 PIN ALTA IMPEDANCIA
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digitalWrite(IO1, HIGH); //VH_MICS2710
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/*Correccion de la tension del Heather*/
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VH_MICS(MICS_2710, 1700); //VH_MICS2710 Inicial
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Serial.println("*******************");
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Serial.println("MICS2710 VH a 1.7V");
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delay(200);
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Vc = (float)average(S3)*Vcc/1023; //mV
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current = Vc/Rc; //mA
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Rh = (readVH(MICS_2710)- Vc)/current; //Ohm
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Vh = (Rh + Rc)*26; //mV
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VH_MICS(MICS_2710, Vh); //VH_MICS2710 Corregido
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Serial.print("MICS2710 correccion VH: ");
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Serial.print(Vh/1000.);
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Serial.println("V");
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Serial.println("Heating...");
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delay(30000);
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/*Lectura de datos*/
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//VH_MICS(MICS_2710, 1200); //VH_MICS2710 Inicial
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RL_MICS(MICS_2710, 10000);
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delay(time);
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Vc = (float)average(S3)*Vcc/1023; //mV
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current = Vc/Rc; //mA
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RL = kr*readMCP(MCP1, 0x01)/1000; //Kohm
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VL = ((float)average(S1)*Vcc)/1023; //mV
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Rs = ((2500-VL)/VL)*RL; //Kohm
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/*Correccion de impedancia de carga*/
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if (Rs > 100) RL_MICS(MICS_2710, 100000);
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else RL_MICS(MICS_2710, Rs*1000);
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delay(100);
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RL = kr*readMCP(MCP1, 0x01)/1000; //Kohm
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VL = ((float)average(S1)*Vcc)/1023; //mV
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Rs = ((2500-VL)/VL)*RL; //Kohm
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Serial.print("MICS2710 Rs: ");
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Serial.print(Rs);
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Serial.println("K");
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digitalWrite(IO1, LOW); //VH MICS2710 OFF
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Serial.println("MICS2710 VH OFF ");
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Serial.println("*******************");
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/*Calculo de los resultados*/
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// if ((Rs/RO_MICS_2710)<RS_RO_MICS_2710[0]) //Valores inferiores a 0.2ppm
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// {
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// return(0);
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// }
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// else
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// {
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// int i=0;
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// while (RS_RO_MICS_2710[i]<Rs/RO_MICS_2710) i++;
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// float m = (PPM_MICS_2710[i] - PPM_MICS_2710[i-1])/(RS_RO_MICS_2710[i] - RS_RO_MICS_2710[i-1]); //Pendiente
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// float b = PPM_MICS_2710[i]-m*RS_RO_MICS_2710[i]; //Ordenada al origen
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// return(m*(Rs/RO_MICS_2710)+b);
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// }
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return(Rs);
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}
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}
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