could please someone tell me whats wrong with my code?
My connections are right - when I run an example from DFRobot the data prints to the serial monitor!
Any help appreciated!
Thanx in advance.
Here’s the code
// Blynk
#include "DFRobot_BME280.h"
#include "Wire.h"
#define BLYNK_PRINT Serial
// bme280
#include <SPI.h>
#include <WiFiNINA.h>
#include <BlynkSimpleWiFiNINA.h>
#define SEA_LEVEL_PRESSURE 1015.0f // sea level pressure
// ******** use abbreviations instead of full names ********
typedef DFRobot_BME280_IIC BME;
BME bme(&Wire, 0x77);
char auth[] = "******";
// Set password to "" for open networks.
char ssid[] = "******";
char pass[] = "******";
float temp = bme.getTemperature();
uint32_t press = bme.getPressure();
float alti = bme.calAltitude(SEA_LEVEL_PRESSURE, press);
float humi = bme.getHumidity();
BlynkTimer timer;
// This function sends Arduino's up time every second to Virtual Pin (5).
// In the app, Widget's reading frequency should be set to PUSH. This means
// that you define how often to send data to Blynk App.
void myTimerEvent1()
{
// You can send any value at any time.
// Please don't send more that 10 values per second.
Blynk.virtualWrite(V5, millis() / 1000);
}
void myTimerEvent2()
{
// You can send any value at any time.
// Please don't send more that 10 values per second.
Blynk.virtualWrite(V10, temp);
void setup()
{
// Debug console
Serial.begin(9600);
Blynk.begin(auth, ssid, pass);
// You can also specify server:
//Blynk.begin(auth, ssid, pass, "blynk-cloud.com", 8442);
//Blynk.begin(auth, ssid, pass, IPAddress(192,168,1,100), 8442);
// Setup a function to be called every second
timer.setInterval(1000L, myTimerEvent1);
timer.setInterval(1000L, myTimerEvent2);
}
void loop()
{
Blynk.run();
timer.run(); // Initiates BlynkTimer
}
Some information about what you see in the serial monitor and the app when you run this sketch would be useful.
Your code that takes a temperature, pressure and humidity reading is floating outside of a function and needs to be moved into the beginning of the myTimerEvent2 function
.
thank you for your fast reply!
I modified the code as instructed and I can get some date from it. unfortunatelly its the wrong date. do you have any idea why?
// Blynk
#include "DFRobot_BME280.h"
#include "Wire.h"
#define BLYNK_PRINT Serial
// bme280
#include <SPI.h>
#include <WiFiNINA.h>
#include <BlynkSimpleWiFiNINA.h>
#define SEA_LEVEL_PRESSURE 1015 // sea level pressure
// ******** use abbreviations instead of full names ********
typedef DFRobot_BME280_IIC BME;
BME bme(&Wire, 0x77);
char auth[] = "******";
// Set password to "" for open networks.
char ssid[] = "******";
char pass[] = "******";
BlynkTimer timer;
// This function sends Arduino's up time every second to Virtual Pin (5).
// In the app, Widget's reading frequency should be set to PUSH. This means
// that you define how often to send data to Blynk App.
void myTimerEvent1()
{
// You can send any value at any time.
// Please don't send more that 10 values per second.
Blynk.virtualWrite(V5, millis() / 1000);
}
void myTimerEvent2()
{
float temp = bme.getTemperature();
uint32_t press = bme.getPressure();
float alti = bme.calAltitude(SEA_LEVEL_PRESSURE, press);
float humi = bme.getHumidity();
// You can send any value at any time.
// Please don't send more that 10 values per second.
Blynk.virtualWrite(V10, temp);
Blynk.virtualWrite(V7, humi);
Blynk.virtualWrite(V8, press);
Blynk.virtualWrite(V9, alti);
}
void setup()
{
// Debug console
Serial.begin(9600);
Blynk.begin(auth, ssid, pass);
// You can also specify server:
//Blynk.begin(auth, ssid, pass, "blynk-cloud.com", 8442);
//Blynk.begin(auth, ssid, pass, IPAddress(192,168,1,100), 8442);
// Setup a function to be called every second
timer.setInterval(1000L, myTimerEvent1);
timer.setInterval(1000L, myTimerEvent2);
}
void loop()
{
Blynk.run();
timer.run(); // Initiates BlynkTimer
}
Since I am planning to build a more complex device for Iot I would like to learn more about C/C++ do you know where I can get this kind of knowlege? Do you know any tutorials online?
It depends on your learning style.
YouTube is a good place to look if you like that sort of thing. There are also numerous blogs and online tutorials.
If printed books are your thing then there are lots of them too.
@daveblynk as referring to the device address on the I2C bus. Ports are something else entirely.
