-->
Page 1 of 2

ESP WIFI visible but no com responce

PostPosted: Mon Nov 17, 2014 2:16 am
by przemo_c
Hi my 3 modules of ESP8266 have arrived and i connected module to pc via FT232RL (fake one after unbricking) set to 3,3v
I've attached ch_pd to 3,3v tx to rx, rx to tx and gnd and 3,3. Ive tried baud rate 9600, 57600 and 115200.
The transmission led's blink on both esp and ft232(but only one per device) when i type in putty or press send on other terminal apps (even tried from android phoine).
I can see wifi network and can connect to it and get connection refused when connecting wia http to it's ip address.
But there is no responce on com port (cr lf line endings selected) no responce for AT , AT+RST , AT+CWLAP . there is also no garbage initially when open ing port etc. i've placed 1F capacitor just to be sure it's not sudden power drop issue (and wifi works for abaout a minute after disconnecting from pc).
Ive tried reversing tx rx but it didnt help.

Does anyone have any clue what can be the issue here

ps in firmware upload mode (gpio0 pulled down) updating app cant find device.

Re: ESP WIFI visible but no com responce

PostPosted: Tue Nov 18, 2014 9:26 am
by kingfisher
Try to type \n (alt+10) instead of enter

Re: ESP WIFI visible but no com responce

PostPosted: Mon Nov 24, 2014 1:09 pm
by Didier9
The fact that you say you do not see anything even at boot time I think indicates the serial data is not getting to putty.
It seems like your USB-serial adapter is not working.
Find a PC with an actual hardware serial port and try again, or get a known good USB-serial adapter.
If you have an oscilloscope, look for serial data coming out of the module.

Re: ESP WIFI visible but no com responce

PostPosted: Mon Dec 01, 2014 4:05 pm
by frasenci
1.- Power the ESp8266 with external 3.3 V source, strong enough.
2.- You will not be able to talk to ESP before you get "......... ready" message on your terminal. Check connections.

Greetings
Francisco