Sending data from Blynk to thingspeak with Bluetooth

Need Help With My Project
1

Hi, I’m creating an sensor network using an Arduino Uno and an Open-Smart bluetooth module. As part of this project it is required that the arduino will send temperature/humidity and light sensor readings via bluetooth to be displayed in Blynk. The sensor readings also need to be display in a thingspeak channel I’ve created. I have tried to do this by using the webhook widget. When i run the project, the number of entries updates as expected, however on the graphs, it is displaying the sensor readings as 0. This is the code I have:

#define BLYNK_PRINT Serial


#include <BlynkSimpleSerialBLE.h>
#include <BLEPeripheral.h>
#include <SoftwareSerial.h>;
#include <DHT.h>

// Auth Token recieved in the Blynk App.
char auth[] = "XXXXXXXXXXXXXXX";



// 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);
  
  Blynk.virtualWrite(V3, "t", "h", "ldr");
}

void loop()
{
  Blynk.run();
  timer.run();
}
void sendSensor()
{
  float h = dht.readHumidity();
  float t = dht.readTemperature();

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

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

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

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

In Blynk I’ve the webhook set up as:

Output: V3
URL: http:// api.thingspeak.com/update?api_key=xxxxxxxxxxxx&field1=/pin[0]/&field2=/pin[1]/&field3=/pin[2]/
Method: GET
Content type: application/json
Body: empty

Any help would be seriously appreciated.
Thanks

1 Like
2

Please remember to properly format your posted code… I fixed your last post.

3

Hi,
I read it and I would make it too, did you solve problem now?
I’m new and im not able to make it alone.
Can you share a code corrected for try to use it please?
Thanks a lot .
mauro