ESP8266 Community Forum

Hello. I connected my esp8266 to a serial converter and it doesn't seem to respond to any command. It also gets hot while the CHPD is connected. It is connected like this:
ESP8266 -> Serial
GND -> GND
VCC->VCC (3.3V)
RX->TX
TX->RX.
I also tried to switch RX and tx but cool term gives me 103: Break condition
Any ideas?

(After a day) Edit: if I connect CHPD and VCC to VCC and TX to TX and RX to RX then the blue LED blinks everytime I send a keystroke. Still no response though.
PS: it no longer gets hot (?)

Greg Zetko wrote:Hello. I connected my esp8266 to a serial converter and it doesn't seem to respond to any command. It also gets hot while the CHPD is connected. It is connected like this:
ESP8266 -> Serial
GND -> GND (3.3V)
VCC->VCC
RX->TX
TX->RX.
I also tried to switch RX and tx but cool term gives me 103: Break condition
Any ideas?

Not sure what you mean by GND:>GND(3.3V) 3.3V should be vcc and GND should be 0. The 8266 can't tolerate more than 3.6 +V on the VCC lead according to data sheets. If you actually wired it with the vcc lead to ground that's an oops. Also check the output levels of your TX lead of the serial converter. Some, although claiming to be 3.3v have a 5v signal level. As I understand it, CHPD should be connected to vcc (or pulled high) for chip enable, so it should not cause overheating (unless of course your polarity is reversed. Hope that helps.

flagtrax wrote:

Greg Zetko wrote:Hello. I connected my esp8266 to a serial converter and it doesn't seem to respond to any command. It also gets hot while the CHPD is connected. It is connected like this:
ESP8266 -> Serial
GND -> GND (3.3V)
VCC->VCC
RX->TX
TX->RX.
I also tried to switch RX and tx but cool term gives me 103: Break condition
Any ideas?

Not sure what you mean by GND:>GND(3.3V) 3.3V should be vcc and GND should be 0. The 8266 can't tolerate more than 3.6 +V on the VCC lead according to data sheets. If you actually wired it with the vcc lead to ground that's an oops. Also check the output levels of your TX lead of the serial converter. Some, although claiming to be 3.3v have a 5v signal level. As I understand it, CHPD should be connected to vcc (or pulled high) for chip enable, so it should not cause overheating (unless of course your polarity is reversed. Hope that helps.

I just wanted to indicate that my usb to serial converter is providing my esp8266 with a 3.3v source. I did connect my GND to GND and VCC to VCC. If my CHPD is connected to VCC, It doesn't respond neither.

Does the power led lits up?

The chip becoming hot it's a tale sign that something is very wrong...