Hello,
I am trying to make a RS232 connection to the Yun but I am having some problems. My sensor works great on the arduino Uno because I use the software Serial library available for the uno but for some reason this library does not work on the Yun and it isnt available. Anyone familiar with this connection on the Yun and know of any libraries.
This code that works on the UNO is attached.
ph_probe.ino (1.04 KB)
The Yun use same MCU as Leonardo.
Not all pins on the Leonardo support change interrupts, so only the following can be used for RX: 8, 9, 10, 11, 14 (MISO), 15 (SCK), 16 (MOSI).
Your code:
#define rx 2
#define tx 3
Correct code:
/*
Software serial multple serial test
Receives from the hardware serial, sends to software serial.
Receives from software serial, sends to hardware serial.
The circuit:
* RX is digital pin 10 (connect to TX of other device)
* TX is digital pin 11 (connect to RX of other device)
Note:
Not all pins on the Mega and Mega 2560 support change interrupts,
so only the following can be used for RX:
10, 11, 12, 13, 50, 51, 52, 53, 62, 63, 64, 65, 66, 67, 68, 69
Not all pins on the Leonardo support change interrupts,
so only the following can be used for RX:
8, 9, 10, 11, 14 (MISO), 15 (SCK), 16 (MOSI).
created back in the mists of time
modified 25 May 2012
by Tom Igoe
based on Mikal Hart's example
This example code is in the public domain.
*/
#include <SoftwareSerial.h>
SoftwareSerial mySerial(10, 11); // RX, TX
RS-232 should be typo, correct name is TTL Serial Communication.