Ah i've cracked triggering it!
It needs to be
echo "1" > /dev/cu.usbmodemHIDPC1 115200
That works and exits in terminal and triggers the command.
Now the only problem as it's in loop is that it keeps writing system over and over. Is there a way I can make it just write the command once and stop? I'm wanting to put this in a script where I have a lot of keyboard commands in just the void setup part which run once, but it seems I need to use loop for listening as it didn't work when I put this code into setup. It's just I only want it to run the code once, not loop forever once the byte is received.
Current code is
#include <Keyboard.h>
char chr; // for incoming serial data, type char is signed 8-bit, -128 to 127, ASCII is char codes. Save 1 byte over type int.
void setup() {
Keyboard.begin();
Serial.begin(115200); // set serial monitor to this, it empties the outgoing buffer 12x faster than 9600.
}
void loop()
{
// read data only when you receive data:
if (Serial.available() > 0)
{
// read the next char in the Serial input buffer, might be the last/latest arrived
if (chr = Serial.read() > 0)
{// run commands
delay(3000);
Keyboard.write('S');
delay(100);
Keyboard.write('Y');
delay(100);
Keyboard.write('S');
delay(100);
Keyboard.write('T');
delay(100);
Keyboard.write('E');
delay(100);
Keyboard.write('M');
delay(100);
Serial.println( chr, HEX );
// if ( chr == 'D' ) // do thing if key is D
}
}
}
GoForSmoke:
I lined up the braces to make it easier to see at a glance. The baud rate and char instead of int are tips to try. Uno has 2K for heap and stack memory, if you develop good RAM habits from the start you can go far without a crash. BTW, don't use type String on Arduino.
char chr; // for incoming serial data, type char is signed 8-bit, -128 to 127, ASCII is char codes. Save 1 byte over type int.
void setup()
{
Serial.begin(115200); // set serial monitor to this, it empties the outgoing buffer 12x faster than 9600.
}
void loop()
{
// read data only when you receive data:
if (Serial.available() > 0)
{
// read the next char in the Serial input buffer, might be the last/latest arrived
chr = Serial.read();
// run commands
// ummmmmmm, what commands?
Serial.println( chr, HEX );
// if ( chr == 'D' ) // do thing if key is D
}
}