hi all
please help me . I want to connect 8051 uc to PC so that it can continuously transfer data received on it's port to the PC.
And How can i send data from uc to GSM network using mobile phone.
In my experience, GSM modules do *not* use standard TTL levels!
Certainly not 5V, and usually not even 3.3V or 3V.
Levels like 2.7V or 1.8V are not uncommon.
"it is imperative to read the datasheet."
Asolutely!
You are correct. It was a bad expression for saying that the modules uses "naked logic levels", without any buffering.
It is quite common that logic level converters are needed between module and processor.