Sending DHT22 data from Arduino to Blynk and Thingspeak over Bluetooth | ThingSpeak Projects | Forum

I have written code that will send the sensor data to Blynk over Bluetooth. Using a webhook widget in Blynk I am trying to send the data to ThingSpeak.

In the Blynk webhook I have the URL: http://api.thingspeak.com/update?api_key=XXXXXXX&field1=t&field2=h&field3=ldr
I have noticed that if I put field1= 20, the value will be updated on the graph.

This is the code I have:

```

#define BLYNK_PRINT Serial

#include
#include
#include
#include
#include

// Auth Token recieved in the Blynk App.
char auth[] = "7c5d501236d44df3838c01cffc2f086e";
char thingspeak = "1CO81IDJXVZVGRDV" ;

// create ble serial instance
SoftwareSerial SerialBLE(10, 11); // Rx, Tx

#define DHTPIN 13 // Pin DHT22 is connected to
#define ldrPIN A0 // Pin LDR is connected to

#define DHTTYPE DHT22 // DHT 22

float t;
float h;
float ldr;

DHT dht(DHTPIN, DHTTYPE);
BlynkTimer timer;

void setup()
{
// Debug console
Serial.begin(9600);
SerialBLE.begin(9600);

Blynk.begin(SerialBLE, auth);

Serial.println("Waiting for connections...");

dht.begin();

// Setup a function to be called every 5 second
timer.setInterval(10000, sendSensor);
timer.setInterval(10000, sendLDR);
timer.setInterval(30000, SendtoThingspeak);

}

void loop()
{
Blynk.run();
timer.run();
}
void sendSensor()
{
float h = dht.readHumidity();
// String hString = String(h);

float t = dht.readTemperature();
// String tString = String(t);

// Write DHT22 values to Blynk
Blynk.virtualWrite(V4, h);
Blynk.virtualWrite(V5, t);
}

void sendLDR()
{
float ldr = analogRead(ldr);

// Write LDR values to Blynkd
Blynk.virtualWrite(V6, ldr);
}

void SendtoThingspeak()
{
Blynk.virtualWrite(V3, t, h, ldr);
}

```

Sorry if the code is difficult to follow, I don't know how to format it on here. I've been using trial and error for a while now trying to figure it out and am out of ideas as to how to get it working.

I have tried changing the URL to http://api.thingspeak.com/update?api_key=XXXXXXX&field1=/pin%5B0%5D/&field2=/pin%5B1%5D/&field3/pin%5B2%5D/
I'm still getting 0 as the output.

I looked at the document and I don't fully understand how to put the data as an array. I added this to my code:

BLYNK_WRITE(V0){
String webhookdata = param.asStr();

}

But I had no luck.

I have noticed that if I put field1 = 50, 50 will be displayed on the graph. So I think this means that the Bluetooth link between Blynk and Thingspeak works, and I just need to figure out how to get real-time sensor readings to sent and displayed on Thingspeak.

This is my channel id: 639757, I have made it public if you don't mind having a look at it and seeing if I've it sent up correctly.