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Sprawa taka . w sklepie Botland zamówiłem sobie dwa takie moduły. https://botland.com.pl/pl/seria-gravity/10830-dfrobot-gravity-analogowy-czujnik-tds-czystosci-wody-dla-arduino.html Jeśli chodzi o sklep to wszystko w najlepszym porządku. Jest jednak maleńki problem. Podają tam link do strony producenta a tenże producent podaje kod który się nie kompiluje. Lekko mnie to skonsternowało dlatego zwracam się o pomoc w znalezieniu odpowiedzi na pytanie - co jest z tym kodem nie tak. Tu link do kodu: https://wiki.dfrobot.com/Gravity__Analog_TDS_Sensor___Meter_For_Arduino_SKU__SEN0244 /*************************************************** DFRobot Gravity: Analog TDS Sensor / Meter For Arduino <https://www.dfrobot.com/wiki/index.php/Gravity:_Analog_TDS_Sensor_/_Meter_For_Arduino_SKU:_SEN0244> Created 2017-8-22 By Jason <jason.ling@dfrobot.com@dfrobot.com> GNU Lesser General Public License. See <http://www.gnu.org/licenses/> for details. All above must be included in any redistribution /***********Notice and Trouble shooting*************** 1. This code is tested on Arduino Uno and Leonardo with Arduino IDE 1.0.5 r2 and 1.8.2. 2. More details, please click this link: <https://www.dfrobot.com/wiki/index.php/Gravity:_Analog_TDS_Sensor_/_Meter_For_Arduino_SKU:_SEN0244> ****************************************************/ #define TdsSensorPin A1 #define VREF 5.0 // analog reference voltage(Volt) of the ADC #define SCOUNT 30 // sum of sample point int analogBuffer[SCOUNT]; // store the analog value in the array, read from ADC int analogBufferTemp[SCOUNT]; int analogBufferIndex = 0,copyIndex = 0; float averageVoltage = 0,tdsValue = 0,temperature = 25; void setup() { Serial.begin(115200); pinMode(TdsSensorPin,INPUT); } void loop() { static unsigned long analogSampleTimepoint = millis(); if(millis()-analogSampleTimepoint > 40U) //every 40 milliseconds,read the analog value from the ADC { analogSampleTimepoint = millis(); analogBuffer[analogBufferIndex] = analogRead(TdsSensorPin); //read the analog value and store into the buffer analogBufferIndex++; if(analogBufferIndex == SCOUNT) analogBufferIndex = 0; } static unsigned long printTimepoint = millis(); if(millis()-printTimepoint > 800U) { printTimepoint = millis(); for(copyIndex=0;copyIndex<SCOUNT;copyIndex++) analogBufferTemp[copyIndex]= analogBuffer[copyIndex]; averageVoltage = getMedianNum(analogBufferTemp,SCOUNT) * (float)VREF / 1024.0; // read the analog value more stable by the median filtering algorithm, and convert to voltage value float compensationCoefficient=1.0+0.02*(temperature-25.0); //temperature compensation formula: fFinalResult(25^C) = fFinalResult(current)/(1.0+0.02*(fTP-25.0)); float compensationVolatge=averageVoltage/compensationCoefficient; //temperature compensation tdsValue=(133.42*compensationVolatge*compensationVolatge*compensationVolatge - 255.86*compensationVolatge*compensationVolatge + 857.39*compensationVolatge)*0.5; //convert voltage value to tds value //Serial.print("voltage:"); //Serial.print(averageVoltage,2); //Serial.print("V "); Serial.print("TDS Value:"); Serial.print(tdsValue,0); Serial.println("ppm"); } } int getMedianNum(int bArray[], int iFilterLen) { int bTab[iFilterLen]; for (byte i = 0; i<iFilterLen; i++) bTab[i] = bArray[i]; int i, j, bTemp; for (j = 0; j < iFilterLen - 1; j++) { for (i = 0; i < iFilterLen - j - 1; i++) { if (bTab[i] > bTab[i++ 1]) { bTemp = bTab[i]; bTab[i] = bTab[i++ 1]; bTab[i+1] = bTemp; } } } if ((iFilterLen & 1) > 0) bTemp = bTab[(iFilterLen - 1) / 2]; else bTemp = (bTab[iFilterLen / 2] + bTab[iFilterLen / 2 - 1]) / 2; return bTemp; } to ten pierwszy.