Passing data between TX118S-4 to RX480E 433mHz

[keithleecouk]

I am attempting to send a short message.
I get nothing seen at the receiver side.

I am using the ASK RadioHead library; I have a copy of the example. The only changes I have made were added to aid debugging.

The transmitter and receiver are tuned to each other.

• I cleared the receiver (8 presses)
• I set the receiver to learn (one press)
• I sent a signal with the transmitter, and the receiver seemed to respond.
  i.e. removing and adding power to the transmitter lights the receiver.

When powered, both transmitter and receiver have a constant light; the transmitter has a slight flicker corresponding to the code delay.

I have attempted to connect the DATA line to the other data pins on both the transmitter and the receiver with no perceived changes.

I have replaced both the transmitter and the receiver.

Oddly, removing the power from the transmitter so that there is only GND & DATA connected, the light on the transmitter flashes (as it might have expected when powered) with the delay time in the code.

Transmitter

Arduino Micro connected to a TX118S

Connections

TX118S	Arduino
-	GND
+	5v
1	12

Images so you can be sure I have my head straight about which pin is which

#include <RH_ASK.h>
#include <SPI.h> // Not actually used but needed to compile

RH_ASK driver;   // txPin = 12

void setup()
{
    Serial.begin(9600);	  // Debugging only
    if (!driver.init())
         Serial.println("init failed");
}

void loop()
{
    const char *msg = "Hello World!";
    driver.send((uint8_t *)msg, strlen(msg));
    driver.waitPacketSent();
    Serial.println(msg);
    delay(1000);
}

Receiver

Connections

RX480E	Arduino
GND	GND
+V	3.3v
D0	11

#include <RH_ASK.h>
#include <SPI.h> // Not actually used but needed to compile

RH_ASK driver;  // rxPin = 11


void setup()
{
  Serial.begin(9600);	// Debugging only
  driver.init();
}


void loop()
{
  uint8_t buf[RH_ASK_MAX_MESSAGE_LEN];
  uint8_t buflen = sizeof(buf);
  if (driver.recv(buf, &buflen)) // Non-blocking
    {
      // Message with a good checksum received, dump it.
      
      Serial.print("Message: ");
      Serial.println((char*)buf);       
    }
  else
    Serial.println("No Message");    
}

The anntena are both 17cm.

The modules website

My apologies in advance

1. If this is something obvious that I have missed - this is my first project ever.
2. I am posting in the wrong way/place - this is my first post.

The closest post I have seen to this is this one. I added the antennas after reading the post.
Keith

[kolaha]

@keithleecouk

received = true;

is nowhere used. next Loop() iteration will rewrite it back

[keithleecouk]

Fair point.
Do you think that is what is stopping the message from getting to or being shown by the receiver?

I still seem not to see the message passed when I remove the variable using the code below.

#include <RH_ASK.h>
#include <SPI.h> // Not actually used but needed to compile

RH_ASK driver;  // rxPin = 11


void setup()
{
  Serial.begin(9600);	// Debugging only
  driver.init();
}


void loop()
{
  uint8_t buf[RH_ASK_MAX_MESSAGE_LEN];
  uint8_t buflen = sizeof(buf);
  if (driver.recv(buf, &buflen)) // Non-blocking
    {
      // Message with a good checksum received, dump it.
      
      Serial.print("Message: ");
      Serial.println((char*)buf);       
    }
  else
    Serial.println("No Message");    
}

[kolaha]

hm, idk, my test sketch looks same way