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Blynk, Arduino and 433 MHz RF


#5

Thanks Alexis, great …

Now I have two arduino nano, the first controls the light of camera 1 and the second commands the caladia, both have a 433 MHz RF receiver, according to the code launched by the transmitter they must be able to reset the digital pin 2 or 3 … .

Thank you


#6

thank you very much for the help you gave me …

But how do I make Arduino and Blynk understand that the 433MHz RF is connected to the digital 4 pin?

Thank you


#7

hello !
this is the code :slight_smile:

/*      ARDUINO  NODEMCU
            0       D3
            1       D10
            2       D4
            3       D9
            4       D2
            5       D1
           12       D6
           13       D7
           14       D5
           15       D8
           16       DO */

 mySwitch.enableTransmit(4); //nodemcu D2

#8

Thanks, it gives me error "exit status 1 ‘mySwitch’ does not name a type

What does it mean?


#9

don’t forget to declare that

#include <RCSwitch.h>
RCSwitch mySwitch = RCSwitch();


#10

I declared it
but still gives me the error …

Help me, please …


#11

please post your entire code, I will take a look.
don’t forget to format it.


#12

‘RCSwitch’ does not name a type
RCSwitch mySwitch = RCSwitch();
^
error: ‘mySwitch’ was not declared in this scope

this is the issue when I comment :

 //#include <RCSwitch.h>

so, you have not the RCSwitch.h library , or you made a mistake naming your lib


#13
#define BLYNK_PRINT Serial


#include <SPI.h>
#include <Ethernet.h>
#include <BlynkSimpleEthernet.h>
#include <DHT.h>
#include <RCSwitch.h>


RCSwitch mySwitch = RCSwitch();



#define PACKET_LENGTH 24 //length

#define SWITCH_1_ON   1173 // decimal code
#define SWITCH_1_OFF  1179 

#define SWITCH_2_ON   1273 
#define SWITCH_2_OFF  1279 

#define SWITCH_3_ON   1373 // decimal code
#define SWITCH_3_OFF  1379 

#define SWITCH_4_ON   1473 
#define SWITCH_4_OFF  1479 

#define SWITCH_5_ON   1573 // decimal code
#define SWITCH_5_OFF  1579 

#define SWITCH_6_ON   1673 
#define SWITCH_6_OFF  1679 

int BTN1;
int BTN2;
int BTN3;
int BTN4;
int BTN5;
int BTN6;


// You should get Auth Token in the Blynk App.
// Go to the Project Settings (nut icon).
char auth[] = "token";

#define W5100_CS  10
#define SDCARD_CS 4

#define DHT1PIN 2          // What digital pin we're connected to
#define DHT2PIN 3          // What digital pin we're connected to

// Uncomment whatever type you're using!
#define DHT1TYPE DHT11     // DHT 11
#define DHT2TYPE DHT11   // DHT 22, AM2302, AM2321
//#define DHTTYPE DHT21   // DHT 21, AM2301

DHT dht1(DHT1PIN, DHT1TYPE);
DHT dht2(DHT2PIN, DHT2TYPE);
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 sendSensor()
{
  float h1 = dht1.readHumidity();
  float t1 = dht1.readTemperature(); // or dht.readTemperature(true) for Fahrenheit

  float h2 = dht2.readHumidity();
  float t2 = dht2.readTemperature(); // or dht.readTemperature(true) for Fahrenheit

  if (isnan(h1) || isnan(t1)) {
    Serial.println("Failed to read from DHT sensor!");
    return;
  }

   if (isnan(h2) || isnan(t2)) {
    Serial.println("Failed to read from DHT sensor!");
    return;
  }
  // You can send any value at any time.
  // Please don't send more that 10 values per second.
  Blynk.virtualWrite(V5, h1);
  Blynk.virtualWrite(V6, t1);

    Blynk.virtualWrite(V7, h2);
    Blynk.virtualWrite(V8, t2);
}

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

  pinMode(SDCARD_CS, OUTPUT);
  digitalWrite(SDCARD_CS, HIGH); // Deselect the SD card

  Blynk.begin(auth);
  // You can also specify server:
  //Blynk.begin(auth, "blynk-cloud.com", 8442);
  //Blynk.begin(auth, IPAddress(192,168,1,100), 8442);

  dht1.begin();
  dht2.begin();

  // Setup a function to be called every second
  timer.setInterval(1000L, sendSensor);
}



BLYNK_WRITE(V11) {
  BTN1 = param.asInt();
  if (BTN1 == true) {
     mySwitch.send(SWITCH_1_ON, PACKET_LENGTH);
     }
  else {
      mySwitch.send(SWITCH_1_OFF, PACKET_LENGTH);
   }
}

BLYNK_WRITE(V12) {
  BTN2 = param.asInt();
  if (BTN2 == true) {
       mySwitch.send(SWITCH_2_ON, PACKET_LENGTH);
     }
  else {
      mySwitch.send(SWITCH_2_OFF, PACKET_LENGTH);
    }
}

BLYNK_WRITE(V13) {
  BTN3 = param.asInt();
  if (BTN3 == true) {
     mySwitch.send(SWITCH_1_ON, PACKET_LENGTH);
     }
  else {
      mySwitch.send(SWITCH_1_OFF, PACKET_LENGTH);
   }
}

BLYNK_WRITE(V14) {
  BTN4 = param.asInt();
  if (BTN4 == true) {
       mySwitch.send(SWITCH_2_ON, PACKET_LENGTH);
     }
  else {
      mySwitch.send(SWITCH_2_OFF, PACKET_LENGTH);
    }
}

BLYNK_WRITE(V15) {
  BTN5 = param.asInt();
  if (BTN5 == true) {
     mySwitch.send(SWITCH_1_ON, PACKET_LENGTH);
     }
  else {
      mySwitch.send(SWITCH_1_OFF, PACKET_LENGTH);
   }
}

BLYNK_WRITE(V26) {
  BTN6 = param.asInt();
  if (BTN6 == true) {
       mySwitch.send(SWITCH_2_ON, PACKET_LENGTH);
     }
  else {
      mySwitch.send(SWITCH_2_OFF, PACKET_LENGTH);
    }
}

void loop()
{
  Blynk.run();
  timer.run();
}

#14

…and he forgot anyhow :stuck_out_tongue:

@nervimarco Please read the proper way to post code here…


#15

:joy::joy::joy::joy::joy::joy:


#16

@nervimarco

I compiled your code and it works fine :wink:
so you probably have an issue with one of the libraries !

can you send me error list?


#17

Thank you so much for your support …

the error comes out when I insert the line
“mySwitch.enableTransmit (4);”

gives me error “exit status 1 ‘mySwitch’ does not name a type”

I do not understand.

Thank you


#18

ah ah
you put an extra space !
try enableTransmit(4);
:wink:


#19

thanks, I’ve already tried …
nothing changes, always a mistake …

Help…


#20

are you sure you put mySwitch.enableTransmit(4); at the right place?
it must be into the void setup , like this

void setup()
{
  // Debug console
  Serial.begin(9600);
  mySwitch.enableTransmit(4); //<<<<<<<<<<<<<--------------------
  pinMode(SDCARD_CS, OUTPUT);
  digitalWrite(SDCARD_CS, HIGH); // Deselect the SD card

#21

Yes Yes Yes Yes

thanks … this was the problem …

Yuuuuhhhuuuuuuu
Thanks thanks thanks…

:+1::+1::+1::+1::+1::+1::+1::+1::+1::+1::+1::+1::+1::+1::+1::+1:


#22

you are welcome my friend


#23

Thanks for the help and patience my friend …
Now I have to realize the part of the project related to the 433Mhz RF receiver that is mounted on Arduino NANO

Upon receipt of the data package, eg 1455 the relay 1 is energized and when the packet 1488 is received, relay 1 goes into the off state …

Help me?

Thanks so much.


#24

Quiet simple !
this is a part of my code to receive the packet, you have to adapt it

void setup()
{
  Serial.begin(115200);
  mySwitch.enableReceive(0);  // Receiver on interrupt 0 => that is pin D3 nodemcu
  timer.setInterval(100, receiver);

void receiver() {
  if (mySwitch.available()) {

    int value = mySwitch.getReceivedValue();
    if (value == 0) {
      Serial.print("Unknown encoding");
    } else {
      Serial.print("Received ");
      Serial.print( mySwitch.getReceivedValue() );
      Serial.print(" / ");
      Serial.print( mySwitch.getReceivedBitlength() );
      Serial.print("bit ");
      Serial.print("Protocol: ");
      Serial.println( mySwitch.getReceivedProtocol() );
      Blynk.virtualWrite(V6, mySwitch.getReceivedValue());//received code to V6 value widget
    }
    mySwitch.resetAvailable();
  }