ESP8266 Community Forum

- Wed Oct 19, 2016 11:07 am #56772

you cannot connect it directly to Arduino's serial lines.

I don't understand, do you mean that the Arduino should not be powering the esp ?
Also, Im connecting the RX to RX (pin 0 on arduino) on the board, TX to TX (pin 1) I guess it's correct, right ?

Thanks.

- Wed Oct 19, 2016 11:52 am #56778

you cannot connect it directly to Arduino's serial lines.

I don't understand, do you mean that the Arduino should not be powering the esp ?
Also, Im connecting the RX to RX (pin 0 on arduino) on the board, TX to TX (pin 1) I guess it's correct, right ?

Thanks.

The "issue" of Tx-->Rx (Arduino Send to ESP8266 Receive) has caused a lots of discussion everywhere. Normal practice in electronic projects is to use a level-shifter when the sending voltage is higher than the receiving voltage. A very simple level-shifter could just be a resistor divider.

But, there seems to be a public statement by Espressif that the Digital Input lines on the ESP8266 are 5V tolerant; therefore suggesting the level-shifter is not required.

In considering the above, you are going to have to make your own decision since the "community" is up in turmoil. Google Link here.

Ray

- Wed Oct 19, 2016 2:29 pm #56791 I tested with a different ESP board, with a different computer with the same arduino, and still nothing. Power is coming in for sure, but don't seems detected, I read a lot about this version but can't find a way to make it work. I ordered a USB to ttl module and will try with another source of voltage see if it works better.