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at commands

Bluetooth AT commands

Hi I bought bluetooth module from ebay. I connected to the atmega and comunicate with my laptop. It works great. I set (in atmega) communication 9600 Bd, but hyperTerminal (auto-detect) shows 2400 Bd. I tried lots of tutorial how to change baud rate (or name, key, ...) using AT commands, but Hyperterminal does not work and the other also. They connected to bluetooth, but when I try wrote something it does not shows in terminal (keboard do not work :D in terminals ). Any idea how comunicate with bluetooth using AT commands? Sorry for my English :) .