Geeetech

I have a Bluetooth TTL Serial module. http://www.geeetech.com/serial-ttl-blue ... p-601.html

My TTL application requires a DTR pin signal. The manual and wiki does not show how to do this. Is that the CLR pin? I do not understand what the CLR pin does. Can someone here help me out please?

Hi friend

I am sorry for deleting your letter carelessly last time.

The Bluetooth has not a DTR pin, The CLR`s function is memory clearing (high level on this pin less than 3s) which means deleting the address of the bluetooth module connected last time.Another function is to restore the default configuration(high level over 3s).

We haven`t a AT commmand manual in English,the AT manual of HC-0305 in the attachmment may help you,they are similar. Regards;
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