AUBTM-20 interfacing with ATmega8
Fri May 25 2012, 12:46 pm
Fri May 25 2012, 04:41 pm
The aubtm is 3.3V module. so if u had connected your module to 5V then it may be dead by now.
use 3.3v regulator like LM1117-3.3 to provide the 3.3v supply to AUBTM 20.
The rx and tx pin of AUBTM 20 are also not 5v tolerable, so its better that you use a pair of MAX232 and MAX3232. ie. max232 on microcontroller side and max3232 on aubtm20 side.
best of luck n hope you haven't fried your Bluetooth module
use 3.3v regulator like LM1117-3.3 to provide the 3.3v supply to AUBTM 20.
The rx and tx pin of AUBTM 20 are also not 5v tolerable, so its better that you use a pair of MAX232 and MAX3232. ie. max232 on microcontroller side and max3232 on aubtm20 side.
best of luck n hope you haven't fried your Bluetooth module
[ Edited Fri May 25 2012, 04:52 pm ]
Fri May 25 2012, 11:40 pm
i am using module with UART facility. when i connect module to my controller its not gving "OK". when i send LLL its give "O"
Sat May 26 2012, 12:26 am
is the baud rate same of both the host and the module?
and try sending "AT" and "CrLfATCrLf"
and try sending "AT" and "CrLfATCrLf"
Sun May 27 2012, 02:28 am
its clearly the baudrate issue as I see. what is the module's and AVR's baudrate?
[Topic moved to AVR Microcontroller Discussion forum]
[Topic moved to AVR Microcontroller Discussion forum]
Sun May 27 2012, 10:50 am
both module and ATmega8 work on 9600 baud rate i have vrified it. so i dont think there is a baud rate problem. thank you AJAY and SUMANT for your kind replies.
Mon May 28 2012, 12:05 am
Try connecting your AUBTM 20 to a PC and using a program such as
Terminal or Hyperterminal to talk to it.
Terminal or Hyperterminal to talk to it.
Mon May 28 2012, 10:51 am
in my project I am using ATmega8 to send command to BT module AUBTM-20. i have checked AUBTM-20 on hyper terminal its working well. but problem is with controller. please help me
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