ESP8266 Community Forum

- Mon Dec 21, 2015 2:08 am #36874 hello !!

i try to flash 2 esp8266 rev 12 with many firmware and many flashing tools but i cant make it !!
can anyone helpme ?
the wiring its 100% correct
and the power is from a power supply 0.5ma and 3.3v
i try 6 days but nothing
im so disappointed
here is a video i hope can help

https://youtu.be/nzOig1yGSxI

- Mon Dec 21, 2015 2:38 am #36879 Hi,

some ideas...

1) maybe it's a configuration issue with the spi. Check out the official flashing tool. It features auto setup and debug functionality.
http://bbs.espressif.com/viewtopic.php?f=46&t=1124
(dl link on the bottom of the page)

2) Switch to 9600 baud

3) Reduce noise in the circuit (capacitor between GND and VCC pins), My ESP07's crystal generates much noise on tx and GPIO02. Don't know if it's normal but it could have an impact on BER during serial communication.

4) Did the chip function properly with its default firmware? Maybe faulty batch?

Good luck!

PS, Do you have a link to this XTCOM utility? It could be helpful for my case:
viewtopic.php?f=6&t=7203

- Mon Dec 21, 2015 6:27 am #36888 What FTDI are you using? What drivers are you using?

- Mon Dec 21, 2015 7:54 am #36896 if using FT232RL usb-serial swap it out - they don't like long data streams..
get a crystal controlled usb-serial converter and save yourself some grief