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[on:]

Hello All,

i am trying to control a YAMPP III Industrial MP3 PLayer via Serial Output from Pins 0 and 1... it doesnt work.

i wired the TX Pin of the Arduino (USB) to the RX of the player via a potential divider circuit using 3 10k resistors, like its described in the manual.

when i power everything up, all seems fine, the player boots up.

but it just doesnt get the serial messages from the arduino. in the manual the command for playing song 1 is 0x01. how can i send this data to the player? serial.print(1, HEX) doesnt help...

has anyone here experience with serial communication with other devices?

thanks,
jens

[Reply #1 on:]

Have you tried serial.print(1, BYTE)?  Using "HEX" will send the ASCII digits of the number, e.g. '1' == 49, while the mp3 player might expect the byte 1.

[Reply #2 on:]

hey mellis, yes, i tried serial.print(1, BYTE)... it does not help...

but thank you!

what does 0x before a HEX value mean, anyway?

cheers,
jens

[Reply #3 on:]

Hey Mellis, just so you know:

Serial.print (Value, BYTE); is the correct way to go... the problem was that the YAMPP player was set to another baud rate (2400 instead of 19200) since i bought it second-hand from a PICAXE user... and the PIC supports only 2400...

now it works.

if anyone is interested in how to connect a YAMPP, an EasyRadio Module and an ARDUINO Board,
visit

http://www.sport4minus.de/blog/?p=149
and
http://www.sport4minus.de/blog/?p=152

Cheers, Jens