├── .gitignore ├── library.properties ├── keywords.txt ├── .github └── workflows │ └── c-cpp.yml ├── .circleci └── config.yml ├── library.json ├── .library.json ├── example └── read_ph │ └── read_ph.ino ├── src ├── DFRobot_ESP_PH_WITH_ADC.h └── DFRobot_ESP_PH_WITH_ADC.cpp ├── README.md └── LICENSE /.gitignore: -------------------------------------------------------------------------------- 1 | .vscode/ -------------------------------------------------------------------------------- /library.properties: -------------------------------------------------------------------------------- 1 | name=DFRobot_ESP_PH_WITH_ADC_BY_GREENPONIK 2 | version=1.2.3 3 | author=GREENPONIK 4 | maintainer=GreenPonik 5 | sentence=Update from DFROBOT library for ESP32+ADC compatibility 6 | paragraph=Update from DFROBOT library for ESP32+ADC compatibility 7 | category=Sensors 8 | url=https://github.com/GreenPonik/DFRobot_ESP_PH_WITH_ADC_BY_GREENPONIK.git 9 | architectures=* 10 | includes=DFRobot_ESP_PH_WITH_ADC.h 11 | -------------------------------------------------------------------------------- /keywords.txt: -------------------------------------------------------------------------------- 1 | ####################################### 2 | # Syntax Coloring DFRobot_ESP_PH_WITH_ADC 3 | ####################################### 4 | 5 | ####################################### 6 | # Datatypes (KEYWORD1) 7 | ####################################### 8 | 9 | DFRobot_ESP_PH_WITH_ADC KEYWORD1 10 | 11 | ####################################### 12 | # Methods and Functions (KEYWORD2) 13 | ####################################### 14 | readPH KEYWORD2 15 | calibration KEYWORD2 -------------------------------------------------------------------------------- /.github/workflows/c-cpp.yml: -------------------------------------------------------------------------------- 1 | name: C/C++ CI 2 | 3 | on: 4 | push: 5 | branches: [ master ] 6 | pull_request: 7 | branches: [ master ] 8 | 9 | jobs: 10 | build: 11 | 12 | runs-on: ubuntu-latest 13 | 14 | steps: 15 | - uses: actions/checkout@v2 16 | - name: configure 17 | run: ./configure 18 | - name: make 19 | run: make 20 | - name: make check 21 | run: make check 22 | - name: make distcheck 23 | run: make distcheck 24 | -------------------------------------------------------------------------------- /.circleci/config.yml: -------------------------------------------------------------------------------- 1 | # Use the latest 2.1 version of CircleCI pipeline process engine. See: https://circleci.com/docs/2.0/configuration-reference 2 | version: 2.1 3 | # Use a package of configuration called an orb. 4 | orbs: 5 | # Declare a dependency on the welcome-orb 6 | welcome: circleci/welcome-orb@0.4.1 7 | # Orchestrate or schedule a set of jobs 8 | workflows: 9 | # Name the workflow "welcome" 10 | welcome: 11 | # Run the welcome/run job in its own container 12 | jobs: 13 | - welcome/run -------------------------------------------------------------------------------- /library.json: -------------------------------------------------------------------------------- 1 | { 2 | "name": "DFRobot_ESP_PH_WITH_ADC_BY_GREENPONIK", 3 | "description": "Read PH with ESP32, ADC Adafruit ADS1115 and DFrobot SEN0161-V2 PH sensor kit", 4 | "keywords": "PH,reader,ESP32", 5 | "authors": { 6 | "name": "GreenPonik (Mickael Lehoux)", 7 | "maintainer": true 8 | }, 9 | "repository": { 10 | "type": "git", 11 | "url": "https://github.com/GreenPonik/DFRobot_ESP_PH_WITH_ADC_BY_GREENPONIK.git" 12 | }, 13 | "version": "1.2.3", 14 | "license": "LGPL-2.1", 15 | "frameworks": "arduino", 16 | "platforms": "espressif32" 17 | } 18 | -------------------------------------------------------------------------------- /.library.json: -------------------------------------------------------------------------------- 1 | { 2 | "name": "DFRobot_ESP_PH_WITH_ADC_BY_GREENPONIK", 3 | "description": "Read PH with ESP32, ADC Adafruit ADS1115 and DFrobot SEN0161-V2 PH sensor kit", 4 | "keywords": ["PH", "reader", "ESP32"], 5 | "authors": [ 6 | { 7 | "email": "contact@greenponik.com", 8 | "url": "https://www.greenponik.com", 9 | "maintainer": true, 10 | "name": "GreenPonik (Mickael Lehoux)" 11 | } 12 | ], 13 | "repository": { 14 | "type": "git", 15 | "url": "https://github.com/GreenPonik/DFRobot_ESP_PH_WITH_ADC_BY_GREENPONIK.git" 16 | }, 17 | "version": "1.2.3", 18 | "license": "LGPL-2.1", 19 | "frameworks": ["arduino"], 20 | "platforms": ["espressif32"] 21 | } 22 | -------------------------------------------------------------------------------- /example/read_ph/read_ph.ino: -------------------------------------------------------------------------------- 1 | /* 2 | * file read_ph.ino 3 | * @ https://github.com/GreenPonik/DFRobot_ESP_PH_WITH_ADC_BY_GREENPONIK 4 | * 5 | * IMPORTANT : to make it work, you will need the help of an additionnal ADC converter because the one on the ESP32 isn't accurate enough. Here we used an ADS1115 from Adafruit 6 | * You can find it here : https://www.adafruit.com/product/1085 7 | * And here is the library you'll need to add to your sketch : https://github.com/adafruit/Adafruit_ADS1X15 8 | * 9 | * This is the sample code for Gravity: Analog pH Sensor / Meter Kit V2, SKU:SEN0161-V2 10 | * In order to guarantee precision, a temperature sensor such as DS18B20 is needed, to execute automatic temperature compensation. 11 | * You can send commands in the serial monitor to execute the calibration. 12 | * Serial Commands: 13 | * enterph -> enter the calibration mode 14 | * calph -> calibrate with the standard buffer solution, two buffer solutions(4.0 and 7.0) will be automaticlly recognized 15 | * exitph -> save the calibrated parameters and exit from calibration mode 16 | * 17 | * Based on the @ https://github.com/DFRobot/DFRobot_PH 18 | * Copyright [DFRobot](http://www.dfrobot.com), 2018 19 | * Copyright GNU Lesser General Public License 20 | * 21 | * ################################################## 22 | * ################################################## 23 | * ######## Forked on github by GreenPonik ########## 24 | * ############# ONLY ESP COMPATIBLE ################ 25 | * ################################################## 26 | * ################################################## 27 | * 28 | * version V1.2.2 29 | * date 2019-06 30 | */ 31 | 32 | #include "DFRobot_ESP_PH_WITH_ADC.h" 33 | #include "OneWire.h" 34 | #include "DallasTemperature.h" 35 | #include "Adafruit_ADS1015.h" 36 | #include "EEPROM.h" 37 | 38 | #define ONE_WIRE_BUS 15 39 | OneWire oneWire(ONE_WIRE_BUS); 40 | DallasTemperature sensors(&oneWire); 41 | 42 | DFRobot_ESP_PH_WITH_ADC ph; 43 | Adafruit_ADS1115 ads; 44 | 45 | float voltage, phValue, temperature = 25; 46 | 47 | float readTemperature() 48 | { 49 | //add your code here to get the temperature from your temperature sensor 50 | sensors.requestTemperatures(); 51 | return sensors.getTempCByIndex(0); 52 | } 53 | 54 | void setup() 55 | { 56 | Serial.begin(115200); 57 | EEPROM.begin(32);//needed EEPROM.begin to store calibration k in eeprom 58 | ph.begin(); 59 | sensors.begin(); 60 | ads.setGain(GAIN_ONE); 61 | ads.begin(); 62 | } 63 | 64 | void loop() 65 | { 66 | static unsigned long timepoint = millis(); 67 | if (millis() - timepoint > 1000U) //time interval: 1s 68 | { 69 | timepoint = millis(); 70 | /** 71 | * index 0 for adc's pin A0 72 | * index 1 for adc's pin A1 73 | * index 2 for adc's pin A2 74 | * index 3 for adc's pin A3 75 | */ 76 | voltage = ads.readADC_SingleEnded(1) / 10; // read the voltage 77 | Serial.print("voltage:"); 78 | Serial.println(voltage, 4); 79 | 80 | temperature = readTemperature(); // read your temperature sensor to execute temperature compensation 81 | Serial.print("temperature:"); 82 | Serial.print(temperature, 1); 83 | Serial.println("^C"); 84 | 85 | phValue = ph.readPH(voltage, temperature); // convert voltage to pH with temperature compensation 86 | Serial.print("pH:"); 87 | Serial.println(phValue, 4); 88 | } 89 | ph.calibration(voltage, temperature); // calibration process by Serail CMD 90 | } -------------------------------------------------------------------------------- /src/DFRobot_ESP_PH_WITH_ADC.h: -------------------------------------------------------------------------------- 1 | /* 2 | * file DFRobot_ESP_PH_WITH_ADC.h * @ https://github.com/GreenPonik/DFRobot_ESP_PH_WITH_ADC_BY_GREENPONIK 3 | * 4 | * Arduino library for Gravity: Analog pH Sensor / Meter Kit V2, SKU: SEN0161-V2 + ADC Adafruit ADS1115 5 | * 6 | * Based on the @ https://github.com/DFRobot/DFRobot_PH 7 | * Copyright [DFRobot](http://www.dfrobot.com), 2018 8 | * Copyright GNU Lesser General Public License 9 | * 10 | * ################################################## 11 | * ################################################## 12 | * ########## Fork on github by GreenPonik ########## 13 | * ############# ONLY ESP COMPATIBLE ################ 14 | * ################################################## 15 | * ################################################## 16 | * 17 | * version V1.2.1 18 | * date 2019-06 19 | */ 20 | 21 | #ifndef _DFROBOT_ESP_PH_WITH_ADC_H_ 22 | #define _DFROBOT_ESP_PH_WITH_ADC_H_ 23 | 24 | #include "Arduino.h" 25 | 26 | #define PHVALUEADDR 0 //the start address of the pH calibration parameters stored in the EEPROM 27 | 28 | /** 29 | * first you need to define the raw voltage for your circuit 30 | * the raw voltage for neutral pH 7.0 and acid pH 4.0 at 25 °c 31 | * for the actual circuit => ESP32 + ADC (ADS1115) 32 | */ 33 | /** 34 | * you may have to adapt voltage acid and neutral offset or directly the ranges 35 | * according to the signal sending by your own pH probe if you don't use the DFRobot pH sensor kit probe 36 | * same circuit with different probe return different voltage value for buffer4.0 or buffer 7.0 37 | */ 38 | #define PH_VOLTAGE_ACID_OFFSET 200 39 | #define PH_VOLTAGE_NEUTRAL_OFFSET 200 40 | #define PH_8_VOLTAGE 995 //linear culculation 41 | #define PH_7_AT_25 1134 //laboratory measurement with isolation circuit, PH meter V2.0 and PH probe from DFRobot kit 42 | #define PH_6_VOLTAGE 1250 //linear culculation 43 | #define PH_5_VOLTAGE 1380 //linear culculation 44 | #define PH_4_AT_25 1521 //laboratory measurement with isolation circuit, PH meter V2.0 and PH probe from DFRobot kit 45 | #define PH_3_VOLTAGE 1700 //linear culculation 46 | 47 | #define PH_VOLTAGE_NEUTRAL_LOW_LIMIT PH_8_VOLTAGE - PH_VOLTAGE_NEUTRAL_OFFSET 48 | #define PH_VOLTAGE_NEUTRAL_HIGH_LIMIT PH_6_VOLTAGE 49 | #define PH_VOLTAGE_ACID_LOW_LIMIT PH_5_VOLTAGE - PH_VOLTAGE_ACID_OFFSET 50 | #define PH_VOLTAGE_ACID_HIGH_LIMIT PH_3_VOLTAGE 51 | 52 | #define ReceivedBufferLength 10 //length of the Serial CMD buffer 53 | 54 | class DFRobot_ESP_PH_WITH_ADC 55 | { 56 | public: 57 | DFRobot_ESP_PH_WITH_ADC(); 58 | ~DFRobot_ESP_PH_WITH_ADC(); 59 | void calibration(float voltage, float temperature, char *cmd); //calibration by Serial CMD 60 | void calibration(float voltage, float temperature); 61 | float readPH(float voltage, float temperature); // voltage to pH value, with temperature compensation 62 | void begin(int EepromStartAddress = PHVALUEADDR); //initialization 63 | 64 | private: 65 | float _phValue; 66 | float _acidVoltage; 67 | float _neutralVoltage; 68 | float _voltage; 69 | float _temperature; 70 | 71 | char _cmdReceivedBuffer[ReceivedBufferLength]; //store the Serial CMD 72 | byte _cmdReceivedBufferIndex; 73 | 74 | private: 75 | int _eepromStartAddress; 76 | boolean cmdSerialDataAvailable(); 77 | void phCalibration(byte mode); // calibration process, wirte key parameters to EEPROM 78 | byte cmdParse(const char *cmd); 79 | byte cmdParse(); 80 | }; 81 | 82 | #endif 83 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | ## DFRobot_ESP_PH_WITH_ADC_BY_GREENPONIK Library 2 | --------------------------------------------------------- 3 | 4 | ESP Ph Reading and Calibration 5 | @ https://github.com/greenponik/DFRobot_ESP_PH_WITH_ADC_BY_GREENPONIK 6 | 7 | >using Gravity: Analog pH Sensor / Meter Kit V2, SKU:SEN0161-V2 + ADC ADS1115 8 | 9 | >based on DFRobot_PH @ https://github.com/DFRobot/DFRobot_PH 10 | 11 | >IMPORTANT : to make it work, you will need the help of an additionnal ADC converter because the one on the ESP32 isn't accurate enough. Here we used an ADS1115 from Adafruit 12 | >You can find it here : https://www.adafruit.com/product/1085 13 | > 14 | >And here is the library you'll need to add to your sketch : https://github.com/adafruit/Adafruit_ADS1X15 15 | 16 | 17 | ## Example 18 | 19 | ```C++ 20 | 21 | #include 22 | #include "DFRobot_ESP_PH_WITH_ADC.h" 23 | #include "OneWire.h" 24 | #include "DallasTemperature.h" 25 | #include "Adafruit_ADS1015.h" 26 | #include "EEPROM.h" 27 | 28 | #define ONE_WIRE_BUS 15 29 | OneWire oneWire(ONE_WIRE_BUS); 30 | DallasTemperature sensors(&oneWire); 31 | 32 | DFRobot_ESP_PH_WITH_ADC ph; 33 | Adafruit_ADS1115 ads; 34 | 35 | float voltage, phValue, temperature = 25; 36 | 37 | float readTemperature() 38 | { 39 | //add your code here to get the temperature from your temperature sensor 40 | sensors.requestTemperatures(); 41 | return sensors.getTempCByIndex(0); 42 | } 43 | 44 | void setup() 45 | { 46 | Serial.begin(115200); 47 | EEPROM.begin(32);//needed EEPROM.begin to store calibration k in eeprom 48 | ph.begin(); 49 | sensors.begin(); 50 | ads.setGain(GAIN_ONE); 51 | ads.begin(); 52 | } 53 | 54 | void loop() 55 | { 56 | static unsigned long timepoint = millis(); 57 | if (millis() - timepoint > 1000U) //time interval: 1s 58 | { 59 | timepoint = millis(); 60 | /** 61 | * index 0 for adc's pin A0 62 | * index 1 for adc's pin A1 63 | * index 2 for adc's pin A2 64 | * index 3 for adc's pin A3 65 | */ 66 | voltage = ads.readADC_SingleEnded(1) / 10; // read the voltage 67 | Serial.print("voltage:"); 68 | Serial.println(voltage, 4); 69 | 70 | temperature = readTemperature(); // read your temperature sensor to execute temperature compensation 71 | Serial.print("temperature:"); 72 | Serial.print(temperature, 1); 73 | Serial.println("^C"); 74 | 75 | phValue = ph.readPH(voltage, temperature); // convert voltage to pH with temperature compensation 76 | Serial.print("pH:"); 77 | Serial.println(phValue, 4); 78 | } 79 | ph.calibration(voltage, temperature); // calibration process by Serail CMD 80 | } 81 | ``` 82 | 83 | ## Compatibility 84 | 85 | MCU | Work Well | Work Wrong | Untested | Remarks 86 | ------------------ | :----------: | :----------: | :---------: | ----- 87 | ESP32 | √ | | | 88 | ESP8266 | | √ | | 89 | 90 | ## Credits 91 | 92 | Written by Mickael Lehoux from [@greenponik](https://www.greenponik.com/) 93 | 94 | >Based on written by Jiawei Zhang(Welcome to our [website](https://www.dfrobot.com/)) 95 | 96 | # Tutorial here 97 | [![Tutorial here](http://img.youtube.com/vi/EqFw561pO5k/0.jpg)](https://www.youtube.com/watch?v=EqFw561pO5k "PH Meter with ESP32 and DFRobot PH module (SEN0161-V2)") 98 | 99 | ### Suscribe on our newsletter here: 100 | en: http://bit.ly/2NuaKbN 101 | 102 | fr: http://bit.ly/2XNf61R 103 | 104 | https://www.greenponik.com 105 | 106 | ## support us 107 | [become a patreon](https://www.patreon.com/bePatron?u=32614023) 108 | -------------------------------------------------------------------------------- /src/DFRobot_ESP_PH_WITH_ADC.cpp: -------------------------------------------------------------------------------- 1 | /* 2 | * file DFRobot_ESP_PH_WITH_ADC.cpp * @ https://github.com/GreenPonik/DFRobot_ESP_PH_WITH_ADC_BY_GREENPONIK 3 | * 4 | * Arduino library for Gravity: Analog pH Sensor / Meter Kit V2, SKU: SEN0161-V2 + ADC Adafruit ADS1115 5 | * 6 | * Based on the @ https://github.com/DFRobot/DFRobot_PH 7 | * Copyright [DFRobot](http://www.dfrobot.com), 2018 8 | * Copyright GNU Lesser General Public License 9 | * 10 | * ################################################## 11 | * ################################################## 12 | * ########## Fork on github by GreenPonik ########## 13 | * ############# ONLY ESP COMPATIBLE ################ 14 | * ################################################## 15 | * ################################################## 16 | * 17 | * version V1.2.1 18 | * date 2019-06 19 | */ 20 | 21 | #include "Arduino.h" 22 | #include "DFRobot_ESP_PH_WITH_ADC.h" 23 | #include "EEPROM.h" 24 | 25 | DFRobot_ESP_PH_WITH_ADC::DFRobot_ESP_PH_WITH_ADC() 26 | { 27 | this->_temperature = 25.0; 28 | this->_phValue = 7.0; 29 | this->_acidVoltage = PH_4_AT_25; //buffer solution 4.0 at 25C 30 | this->_neutralVoltage = PH_7_AT_25; //buffer solution 7.0 at 25C 31 | this->_voltage = PH_7_AT_25; 32 | } 33 | 34 | DFRobot_ESP_PH_WITH_ADC::~DFRobot_ESP_PH_WITH_ADC() 35 | { 36 | } 37 | 38 | void DFRobot_ESP_PH_WITH_ADC::begin(int EepromStartAddress) 39 | { 40 | this->_eepromStartAddress = EepromStartAddress; 41 | //check if calibration values (neutral and acid) are stored in eeprom 42 | this->_neutralVoltage = EEPROM.readFloat(this->_eepromStartAddress); //load the neutral (pH = 7.0)voltage of the pH board from the EEPROM 43 | if (this->_neutralVoltage == float() || isnan(this->_neutralVoltage) || isinf(this->_neutralVoltage)) 44 | { 45 | this->_neutralVoltage = PH_7_AT_25; // new EEPROM, write typical voltage 46 | EEPROM.writeFloat(this->_eepromStartAddress, this->_neutralVoltage); 47 | EEPROM.commit(); 48 | } 49 | 50 | this->_acidVoltage = EEPROM.readFloat(this->_eepromStartAddress + (int)sizeof(float)); //load the acid (pH = 4.0) voltage of the pH board from the EEPROM 51 | if (this->_acidVoltage == float() || isnan(this->_acidVoltage) || isinf(this->_acidVoltage)) 52 | { 53 | this->_acidVoltage = PH_4_AT_25; // new EEPROM, write typical voltage 54 | EEPROM.writeFloat(this->_eepromStartAddress + (int)sizeof(float), this->_acidVoltage); 55 | EEPROM.commit(); 56 | } 57 | } 58 | 59 | float DFRobot_ESP_PH_WITH_ADC::readPH(float voltage, float temperature) 60 | { 61 | // Serial.print("[readPH]... _neutraVoltage:"); 62 | // Serial.print(this->_neutralVoltage); 63 | // Serial.print(", _acidVoltage:"); 64 | // Serial.print(this->_acidVoltage); 65 | float slope = (7.0 - 4.0) / ((this->_neutralVoltage - PH_7_AT_25) / 3.0 - (this->_acidVoltage - PH_7_AT_25) / 3.0); // two point: (_neutralVoltage,7.0),(_acidVoltage,4.0) 66 | float intercept = 7.0 - slope * (this->_neutralVoltage - PH_7_AT_25) / 3.0; 67 | // Serial.print(", slope:"); 68 | // Serial.print(slope); 69 | // Serial.print(", intercept:"); 70 | // Serial.println(intercept); 71 | this->_phValue = slope * (voltage - PH_7_AT_25) / 3.0 + intercept; //y = k*x + b 72 | Serial.print(F(">>>phValue ")); 73 | Serial.print(this->_phValue,4); 74 | Serial.println(F("<<<")); 75 | return this->_phValue; 76 | } 77 | 78 | void DFRobot_ESP_PH_WITH_ADC::calibration(float voltage, float temperature, char *cmd) 79 | { 80 | this->_voltage = voltage; 81 | this->_temperature = temperature; 82 | strupr(cmd); 83 | phCalibration(cmdParse(cmd)); // if received Serial CMD from the serial monitor, enter into the calibration mode 84 | } 85 | 86 | void DFRobot_ESP_PH_WITH_ADC::calibration(float voltage, float temperature) 87 | { 88 | this->_voltage = voltage; 89 | this->_temperature = temperature; 90 | if (cmdSerialDataAvailable() > 0) 91 | { 92 | phCalibration(cmdParse()); // if received Serial CMD from the serial monitor, enter into the calibration mode 93 | } 94 | } 95 | 96 | boolean DFRobot_ESP_PH_WITH_ADC::cmdSerialDataAvailable() 97 | { 98 | char cmdReceivedChar; 99 | static unsigned long cmdReceivedTimeOut = millis(); 100 | while (Serial.available() > 0) 101 | { 102 | if (millis() - cmdReceivedTimeOut > 500U) 103 | { 104 | this->_cmdReceivedBufferIndex = 0; 105 | memset(this->_cmdReceivedBuffer, 0, (ReceivedBufferLength)); 106 | } 107 | cmdReceivedTimeOut = millis(); 108 | cmdReceivedChar = Serial.read(); 109 | if (cmdReceivedChar == '\n' || this->_cmdReceivedBufferIndex == ReceivedBufferLength - 1) 110 | { 111 | this->_cmdReceivedBufferIndex = 0; 112 | strupr(this->_cmdReceivedBuffer); 113 | return true; 114 | } 115 | else 116 | { 117 | this->_cmdReceivedBuffer[this->_cmdReceivedBufferIndex] = cmdReceivedChar; 118 | this->_cmdReceivedBufferIndex++; 119 | } 120 | } 121 | return false; 122 | } 123 | 124 | byte DFRobot_ESP_PH_WITH_ADC::cmdParse(const char *cmd) 125 | { 126 | byte modeIndex = 0; 127 | if (strstr(cmd, "ENTERPH") != NULL) 128 | { 129 | modeIndex = 1; 130 | } 131 | else if (strstr(cmd, "EXITPH") != NULL) 132 | { 133 | modeIndex = 3; 134 | } 135 | else if (strstr(cmd, "CALPH") != NULL) 136 | { 137 | modeIndex = 2; 138 | } 139 | return modeIndex; 140 | } 141 | 142 | byte DFRobot_ESP_PH_WITH_ADC::cmdParse() 143 | { 144 | byte modeIndex = 0; 145 | if (strstr(this->_cmdReceivedBuffer, "ENTERPH") != NULL) 146 | { 147 | modeIndex = 1; 148 | } 149 | else if (strstr(this->_cmdReceivedBuffer, "EXITPH") != NULL) 150 | { 151 | modeIndex = 3; 152 | } 153 | else if (strstr(this->_cmdReceivedBuffer, "CALPH") != NULL) 154 | { 155 | modeIndex = 2; 156 | } 157 | return modeIndex; 158 | } 159 | 160 | void DFRobot_ESP_PH_WITH_ADC::phCalibration(byte mode) 161 | { 162 | char *receivedBufferPtr; 163 | static boolean phCalibrationFinish = 0; 164 | static boolean enterCalibrationFlag = 0; 165 | switch (mode) 166 | { 167 | case 0: 168 | if (enterCalibrationFlag) 169 | { 170 | Serial.println(F(">>>Command Error<<<")); 171 | } 172 | break; 173 | 174 | case 1: 175 | enterCalibrationFlag = 1; 176 | phCalibrationFinish = 0; 177 | Serial.println(); 178 | Serial.println(F(">>>Enter PH Calibration Mode<<<")); 179 | Serial.println(F(">>>Please put the probe into the 4.0 or 7.0 standard buffer solution<<<")); 180 | Serial.println(); 181 | break; 182 | 183 | case 2: 184 | if (enterCalibrationFlag) 185 | { 186 | // buffer solution:7.0 187 | // 7795 to 1250 188 | if ((this->_voltage > PH_VOLTAGE_NEUTRAL_LOW_LIMIT) && (this->_voltage < PH_VOLTAGE_NEUTRAL_HIGH_LIMIT)) 189 | { 190 | Serial.println(); 191 | Serial.print(F(">>>Buffer Solution:7.0")); 192 | this->_neutralVoltage = this->_voltage; 193 | Serial.println(F(",Send EXITPH to Save and Exit<<<")); 194 | Serial.println(); 195 | phCalibrationFinish = 1; 196 | } 197 | //buffer solution:4.0 198 | //1180 to 1700 199 | else if ((this->_voltage > PH_VOLTAGE_ACID_LOW_LIMIT) && (this->_voltage < PH_VOLTAGE_ACID_HIGH_LIMIT)) 200 | { 201 | Serial.println(); 202 | Serial.print(F(">>>Buffer Solution:4.0")); 203 | this->_acidVoltage = this->_voltage; 204 | Serial.println(F(",Send EXITPH to Save and Exit<<<")); 205 | Serial.println(); 206 | phCalibrationFinish = 1; 207 | } 208 | else 209 | { 210 | Serial.println(); 211 | Serial.print(F(">>>Buffer Solution Error Try Again<<<")); 212 | Serial.println(); // not buffer solution or faulty operation 213 | phCalibrationFinish = 0; 214 | } 215 | } 216 | break; 217 | 218 | case 3: //store calibration value in eeprom 219 | if (enterCalibrationFlag) 220 | { 221 | Serial.println(); 222 | if (phCalibrationFinish) 223 | { 224 | // buffer solution:7.0 225 | // 7795 to 1250 226 | if ((this->_voltage > PH_VOLTAGE_NEUTRAL_LOW_LIMIT) && (this->_voltage < PH_VOLTAGE_NEUTRAL_HIGH_LIMIT)) 227 | { 228 | EEPROM.writeFloat(this->_eepromStartAddress, this->_neutralVoltage); 229 | EEPROM.commit(); 230 | } 231 | //buffer solution:4.0 232 | //1180 to 1700 233 | else if ((this->_voltage > PH_VOLTAGE_ACID_LOW_LIMIT) && (this->_voltage < PH_VOLTAGE_ACID_HIGH_LIMIT)) 234 | { 235 | EEPROM.writeFloat(this->_eepromStartAddress + (int)sizeof(float), this->_acidVoltage); 236 | EEPROM.commit(); 237 | } 238 | Serial.print(F(">>>Calibration Successful")); 239 | } 240 | else 241 | { 242 | Serial.print(F(">>>Calibration Failed")); 243 | } 244 | Serial.println(F(",Exit PH Calibration Mode<<<")); 245 | Serial.println(); 246 | phCalibrationFinish = 0; 247 | enterCalibrationFlag = 0; 248 | } 249 | break; 250 | } 251 | } 252 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU LESSER GENERAL PUBLIC LICENSE 2 | Version 2.1, February 1999 3 | 4 | Copyright (C) 1991, 1999 Free Software Foundation, Inc. 5 | 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 6 | Everyone is permitted to copy and distribute verbatim copies 7 | of this license document, but changing it is not allowed. 8 | 9 | [This is the first released version of the Lesser GPL. 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