UART communication problem

Hello,

I am trying to use following code in a PIC18F14K50 to change configuration of a rn42 Bluetooth Module and it goes to command mode but then it gets stuck:


As an example I want to change name of bluetooth module and then reboot it.

Code:

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DEFINE LOADER_USED 1
DEFINE HSER_RCSTA 90h
DEFINE HSER_TXSTA 24h
DEFINE HSER_BAUD 115200
DEFINE HSER_SPBRG 12
DEFINE HSER_CLOERR 1

DEFINE OSC 24

ADCON0 = 011100
ADCON1 = 000000
ADCON2 = 110101

ANSEL = 001000     
ANSELH = 000011 

TRISC.4 = 0
TRISC.0 = 0
TRISC.1 = 1
TRISB.5 = 1
TRISB.7 = 0

tx1 VAR PORTB.7
rx1 VAR PORTB.5
 
LED VAR PORTC.4

Mybutton VAR PORTC.1
 
mainloop:
  If Mybutton = 0 Then
      HIGH LED      ' Turn on LED
            Hserout ["$$$"]                            'enter command mode
            Pause 100       
            Hserout ["SN,MyBT"]                      'Change name to MyBT
            Pause 100
            Hserout ["R,1"]                              'Reboot                     
      Pause 500
  Else
      LOW LED    ' Turn off LED
      Pause 500
  Endif
  Goto mainloop  ' Do it forever

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I receive the data on serial monitor when I use a UART-USB converter so I know the strings are being sent.

However,the module starts blinking after $$$ but it doesn't perform the rest of commands.The similar Arduino code works without any problem.

Any idea why it doesn't work?

Hi,
Never used the RN42 but shouldn't there be some sort of line termination characters after each command, like a LF or CR?
How else would it distinguish between for example MyBT and R, perhaps you wanted to change the name to MyBTR....


EDIT: Yeah, the command reference seems to indicate CR is what it expects.
/Henrik.

You also have a typo, you have DEFINE HSER_CLOERR 1 it should be DEFINE HSER_CLROERR 1

Quote:

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Originally Posted by HenrikOlsson

Hi,
Never used the RN42 but shouldn't there be some sort of line termination characters after each command, like a LF or CR?
How else would it distinguish between for example MyBT and R, perhaps you wanted to change the name to MyBTR....


EDIT: Yeah, the command reference seems to indicate CR is what it expects.
/Henrik.

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AWESOME! That was the problem and it's working now.