USB TTL converter (FTDI,...) TX 3.3V !=5V
Posted: Wed May 20, 2015 3:06 amHello,
I see in all Arduino tutorials, that there should be a logic level conversation between RX/TX ESP/Uno because of the 5V the uno give to the ESP.
But(!): Every USB-serial dongle I own (about 4 different ones, like FTDI,...) even with 3.3 jumperable option gives 5V on the TX line.
I cannot believe that nobody has noticed that?
I see in all Arduino tutorials, that there should be a logic level conversation between RX/TX ESP/Uno because of the 5V the uno give to the ESP.
But(!): Every USB-serial dongle I own (about 4 different ones, like FTDI,...) even with 3.3 jumperable option gives 5V on the TX line.
I cannot believe that nobody has noticed that?