Though not mandated, many motorcycles also support OBD-II PIDs. Manufacturers also define additional PIDs specific to their vehicles. All on-road vehicles and trucks sold in North America are required to support a subset of these codes, primarily for state mandated emissions inspections. SAE standard J1979 defines many OBD-II PIDs. ![]() Serial.println("DO:\t" + String(readDO(ADC_Voltage, temperature)) + "\t") ĭtCursor(30, 20) //oled displayĭisplay.print((readDO(ADC_Voltage, temperature))/1000) ĭisplay.OBD-II PIDs ( On-board diagnostics Parameter IDs) are codes used to request data from a vehicle, used as a diagnostic tool. Serial.print("ADC Voltage:\t" + String(ADC_Voltage) + "\t") Serial.print("ADC RAW:\t" + String(ADC_Raw) + "\t") Serial.print("temperature:\t" + String(temperature) + "\t") Serial.print("PH:\t" + String(phValue) + "\t" ) PhValue=3.5phValue //convert the millivolt into pH value Serial.println("Ready") //Test the serial monitorĪDC_Voltage = uint32_t(VREF) * ADC_Raw / ADC_RES įor(int i=2 i<8 i++) //take the average value of 6 center sampleįloat phValue=(float)avgValue 5.0/1024/6 //convert the analog into millivolt Return (voltage_mv * DO_Table / V_saturation) Int16_t readDO(uint32_t voltage_mv, uint8_t temperature_c) Two-point calibration needs to be filled CAL2_V and CAL2_T Single point calibration needs to be filled CAL1_V and CAL1_T #define READ_TEMP (25) //Current water temperature ℃, Or temperature sensor function ADDED DEFINE SENSOR PIN A0 FOR PH ENDS HERE-LEHANSA Unsigned long int avgValue //Store the average value of the sensor feedback #define SensorPin A0 // the pH meter Analog output is connected with the Arduino’s Analog ADDED DEFINE SENSOR PIN A0 FOR PH STARTS HERE-LEHANSA #define OLED_RESET -1 // Reset pin # (or -1 if sharing Arduino reset pin)Īdafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET) ![]() #define SCREEN_HEIGHT 64 // OLED display height, in pixels #define SCREEN_WIDTH 128 // OLED display width, in pixels Ph, DO, Temperature to OLED from Arduino - Lehansa M This is the program that collects and displays pH, temperature, and dissolved oxygen values.: You can even switch between BLE and WiFi with some Arduinos. There are a couple of Nano sized Arduinos that have WiFi and/or BLE build in. ![]() There are additional options if you want to extend this system e.g., local or cloud data storage and analysis. You can have a secure WPA2 access point or connect to your home WiFi. With some HTML and CSS knowledge you can make that very pretty. It allows you to run a local WebServer that provides an interface that anyone can use. When you have power available you can use WiFi. Maybe the app from drmpf is something in between. But for a good user experience you need to write your own. ) that allow you to read and write raw data. There are generic apps (BLE Scanner, nRF Connect. The drawback is you need an app to interact with your BLE device. e.g., when your sensor runs from a battery. So, here are a few general points.īLE is great when you need low power.
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