Monitorizarea online wireless a puterii produse de o turbina VAWT se poate realiza cu doar 5$ !
Sunt necesare doar o placa de dezvoltare cu WEMOS D1 MINI ~2.6 $ si un senzor de curent INA 219 ~1.7$.
Daca se inlocuieste rezistenta 0.1 ohm de pe senzorul INA219 cu o rezistenta de 0.01 ohm, 10W se pot masura curenti de pana la 32A cu o rezolutie de 8mA.
Codul necesar :
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#include <DHT.h> #include <Wire.h> #include <Adafruit_INA219.h> #include <ESP8266WiFi.h> #include "ThingSpeak.h" int AC = 0; int lastAC = 0; int turatie = 0; unsigned long myChannelNumber = 22793; const char * myWriteAPIKey = "cheie"; const char* ssid = "HUAWEI-SQ77"; const char* password = "parola"; #define DHTPIN D4 #define DHTTYPE DHT11 DHT dht(DHTPIN, DHTTYPE); WiFiClient client; Adafruit_INA219 ina219; void setup() { Serial.begin(115200); delay(10); dht.begin(); WiFi.begin(ssid, password); Serial.println(); Serial.println(); Serial.print("Connecting to "); Serial.println(ssid); WiFi.begin(ssid, password); while (WiFi.status() != WL_CONNECTED) { delay(5000); Serial.print("."); } Serial.println(""); Serial.println("WiFi connected"); ina219.begin(); Serial.println("Measuring voltage and current with INA219 ..."); ThingSpeak.begin(client); Serial.println("ThingSpeak connected"); } void loop() { float t = dht.readTemperature(); float h = dht.readHumidity(); delay(5); if (isnan(h) || isnan(t)) { Serial.println("Failed to read from DHT sensor!"); return; } float shuntvoltage = 0; float busvoltage = 0; float current_mA = 0; float loadvoltage = 0; float power = 0; float turatiei = 0; float current_A = 0; for(int i=0;i<2500;i++) { shuntvoltage = shuntvoltage + ina219.getShuntVoltage_mV(); busvoltage = busvoltage + ina219.getBusVoltage_V(); current_mA = current_mA + ina219.getCurrent_mA(); AC = digitalRead(5); // Se contorizeaza trecerea prin "0" if ((AC == LOW) && (AC != lastAC )) { turatiei++; } lastAC= digitalRead(5); delay(5); } turatie=turatiei*60/8/15; shuntvoltage = shuntvoltage/2500; busvoltage = busvoltage/2500; loadvoltage = busvoltage + (shuntvoltage / 1000); current_A = current_mA/2500/1000; power = loadvoltage * current_A; Serial.print("Bus Voltage: "); Serial.print(busvoltage); Serial.println(" V"); Serial.print("Shunt Voltage: "); Serial.print(shuntvoltage); Serial.println(" mV"); Serial.print("Load Voltage: "); Serial.print(loadvoltage); Serial.println(" V"); Serial.print("Current: "); Serial.print(current_A); Serial.println(" A"); Serial.print("Power: "); Serial.print(power); Serial.println(" W"); Serial.println(""); Serial.print("Temperature: "); Serial.print(t); Serial.print(" degrees Celsius Humidity: "); Serial.print(h); Serial.println(""); ThingSpeak.setField(1,loadvoltage); ThingSpeak.setField(2,current_A); ThingSpeak.setField(3,power); ThingSpeak.setField(4,turatie); ThingSpeak.setField(5,t); ThingSpeak.setField(6,h); ThingSpeak.writeFields(myChannelNumber, myWriteAPIKey); Serial.println("Send to ThingSpeak"); } |
Contine suplimentar cod pentru integrarea unui senzor de temperatura / umiditate DH11 si pentru determinarea turatiei.