ESP8266 Community Forum

- Mon Dec 08, 2014 8:47 am #4280 I don't understand why with another sketch it work anyway. I will try with the resistor. Thanks

- Mon Dec 08, 2014 9:13 am #4281 Interestingly, eventhough I've been using 1K and 1.8K resistor ladder to bring 5V SIGNAL from the FTDI TX to the ESP RX, I have not used anything beetwen the ESP TX and FTDI RX.
Furthermore, I did not use ANY level shifting on the Arduino Mega.

It is very curious that you do not see the Arduino RX not blinking. Have you double-checked that the RX and TX between the two devices are crossed?

- Mon Dec 08, 2014 9:35 am #4283

Interestingly, eventhough I've been using 1K and 1.8K resistor ladder to bring 5V SIGNAL from the FTDI TX to the ESP RX, I have not used anything beetwen the ESP TX and FTDI RX.
Furthermore, I did not use ANY level shifting on the Arduino Mega.

It is very curious that you do not see the Arduino RX not blinking. Have you double-checked that the RX and TX between the two devices are crossed?

Sure, all the connection are right. I've also added a resistor on the RX pin but the problem still persists, the RX pin on Arduino doesn't turn on!!

- Mon Dec 08, 2014 9:47 am #4285

Interestingly, eventhough I've been using 1K and 1.8K resistor ladder to bring 5V SIGNAL from the FTDI TX to the ESP RX, I have not used anything beetwen the ESP TX and FTDI RX.
Furthermore, I did not use ANY level shifting on the Arduino Mega.

It is very curious that you do not see the Arduino RX not blinking. Have you double-checked that the RX and TX between the two devices are crossed?

Sure, all the connection are right. I've also added a resistor on the RX pin but the problem still persists, the RX pin on Arduino doesn't turn on!!

Bummer...