[solved] ONE serial source for TWO UNO

Using Arduino Networking, Protocols, and Devices
#1

Hello every body.

Is it possible to receive the same serial data from a single source on two UNO ?
Each UNO using different part of serial data.

Something like that :

source UNO UNO

GND ----- GND ----- GND
TX ------- RX ------- RX
RX ------- TX
VCC ----- VCC

source and UNOs having same baud rate.

#2

Yes, as long as you don't connect two TX lines together.

Pieter

#3

I try with GPS modul and I receive nothing, GPS modul work fine on each UNO (I see data in IDE serial monitor)

#4

Are you using the hardware UART for communication with the GPS module?
This UART is also connected to the USB-to-Serial converter (to the serial monitor).
Did you connect the TX of the GPS to the RX of the UNO (i.e. pin 0) or the RX pin of the USB-to-Serial interface (i.e. pin 1).

Pieter

#5

I do not use pin 0 and 1. I use 12 and 11 on each UNO.

#include <NeoSWSerial.h>
NeoSWSerial gpsPort( 12, 11); // pin 11 to GPS TX, pin 12 to GPS RX

void setup()
{
  .../...
   Serial.begin(9600);
   while (!Serial) {}
   Serial.print("Serial connected");
   gpsPort.begin(9600);
   while (!Serial) {}
   Serial.print("GPS connected");
  .../...
}

void loop()
{  
  .../...
  
  while (gps.available( gpsPort )) 
  {   
      data = gps.read();
       .../...
      Serial.print(data);
       .../...
   }
  .../...

}
#6

Have you a common GND connection between all 3 devices?

...R

#7

Robin2:
Have you a common GND connection between all 3 devices?

...R

YES : GND ----- GND ----- GND

neutrinos:
Hello every body.

Is it possible to receive the same serial data from a single source on two UNO ?
Each UNO using different part of serial data.

Something like that :

source UNO UNO

GND ----- GND ----- GND
TX ------- RX ------- RX
RX ------- TX
VCC ----- VCC

source and UNOs having same baud rate.

#8