Thank you, I have this but i don't know what program to use ?
If using Lady Heather, check the docs.
http://www.ke5fx.com/heather/heather.pdfYou can use !U to send commands to the receiver. Or use !T to enter a built in terminal emulator direct communications.
You can also do this at startup from the heather.cfg file using the @ keyboard scripting command.
Alternatively, use another terminal program (I like PuTTY and RealTerm) to send the necessary commands ($UTC+n & $TZLCL), disconnect the serial port in that app, and then start Lady Heather. You'll probably need to resend the commands if you restart the device, unless it remembers the settings.