1.3 KiB
Telegraph
Arduino library for automatically sending Morse code signals. Manual control, speed adjustments, and use of active-on-low relays are supported.
Usage
Check the example sketches, especially
Telegraph_Demo
,
for more information.
Setup
To create a Telegraph
object, use the code:
Telegraph telegraphName(pinNumber, speedInWordsPerMinute, HIGH);
(Use LOW
instead of HIGH
for an active-on-low relay. If you're using a
relay and aren't sure whether it's active-on-low or not, just try it with
HIGH
; if your relay is active-on-low, keying will be opposite of what is
expected.)
Sending messages
To send a message in Morse code, run this:
telegraphName.send("MESSAGE");
The following characters can be used in messages:
ABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890.,?'!/()&:;=+-_"$@
Lowercase letters are supported. Unsupported characters will not be transmitted, but may cause gaps in timing.
Adjusting speed
To change the transmission speed after creating the Telegraph
, run:
telegraphName.wpm = 25;
Manual control
To manually turn the pin on and off, just use these commands:
telegraphName.on();
telegraphName.off();