ESP8266 Community Forum

- Sun Oct 11, 2015 8:31 am #31092 FYI I've had instances where my app has some how screwed up the FW and I have to reflash with a different FW [ie] If was AT then try flash nodemcu and vice versa....
If you cannot reflash from what was working connections and replugging usb , probably blown.

When I started playing with the ESP-201, had 8 ESP-201's and after about 3 hours I thought I had them all bricked, every thing I tried failed... Then next AM restarted from scratch and everything worked.
Never did figure out what went wrong......

Also had 10 FTrs232 USB thingies, only 2 out of the 10 would load the FW,, Went with a crystal controlled usb[prolific] have had no issues other than sometimes need replug usb

- Sun Oct 11, 2015 11:56 am #31105 @xtal

Yeah that sounds about par for the course once in a while you will have oddball issues that make you think something is broken when it is really not etc....
Funny thing you mention the crystal thing is that what made you choose your nickname?

@ BigFootIT

BTW sometimes it helps if you run the application with administrative rights as well may want to consider while it likely is not the case here I have seen programs to flash small ticket printers that required you to do this by default or another excellent example if you ever wanted to do a scan with spybot for a while you had to run with admin rights although not related per say there are many other examples as well of admin rights issues. Well it is a bummer that the device is not functional.

One other thing to check is your supply make sure you are getting the correct voltage 3.3v where you need it etc...
http://www.forward.com.au/pfod/ESP8266/ ... index.html check that out as well.

Interesting thing I haven't really seen many people use SDIO at all.

The fact that the light is flashing briefly seems to indicate there is a problem reminds me of a short somewhere or something there are no bridged solder joints on your board or no strands of wire hanging off your 3.3 v that could be arcing off somewhere. You are not programming this on a metal surface or anything odd like that correct?

Could you take pictures and post the top and bottom of the board high quality pics if possible and share them on an image site like imgur or something or here if the forum allows larger pictures.

Helpful? Donate To help support Mike http://www.esp8266basic.com click the donate button lets keep this project going and hope we can get the ESP32 in the mix. BEGINNERS GUIDE HERE http://www.esp8266.com/viewtopic.php?f=40&t=6732

Where I buy my ESP8266 boards from... (Banggood)

- Mon Oct 12, 2015 3:11 pm #31187 @forlotto

I tried running Arduino IDE as administrator but it still doesn't work.
About the wiring I'm quite sure that I'm not wrong, I connect GPIO2 to 3.3v, GPIO15 and GPIO0 to GND.
I'm not programming on a metal surface (I use a standard breadboard).
I made 2 pics, tell me if the quality is good enough (I haven't used bbcode for images cause they're too big):

http://i.imgur.com/oRc0mSO.jpg
http://i.imgur.com/K9UDi53.jpg

Thanks a lot.

- Mon Oct 12, 2015 3:37 pm #31190 Measure continuity between your connections on the board and nodemcu be sure there are no broken traces etc...

Be sure that your measure voltages as well.

You'll need a 3.3V serial connection. 5v serial risks damage the ESP-8266, so use a 3.3V device or a level converter. I use SparkFun's 3.3V FTDI breakout (https://www.sparkfun.com/products/9873).

If using a serial converter like mine, you will also need a separate 3.3V power supply for the ESP-8266. It requires more current than most serial converters will supply.

Wiring (pinouts for some ESP-8266 versions at https://github.com/esp8266/esp8266-wiki ... e_versions):
[youtube]https://www.youtube.com/watch?t=32&v=JA-0hs5rpMY[/youtube]


Serial converter ground, ESP-8266 ground, and power supply ground should all be connected
ESP-8266 3.3V to power supply 3.3V
ESP-8266 Tx and Rx to serial converter Tx and Rx. The labeling varies. For my converter, connect Tx to Rx and Rx to Tx. Connecting them backwards won't do any damage, so try both ways if unsure
ESP-8266 reset and chip enable to power supply 3.3V
Only when flashing firmware, connect ESP-8266 GPIO 0 to ground

Make sure to power on the serial converter BEFORE the ESP-8266 chip.

This should get you up and running or tell you how it failed.

Hope this helps.

Last edited by forlotto on Mon Oct 12, 2015 4:13 pm, edited 1 time in total.

Helpful? Donate To help support Mike http://www.esp8266basic.com click the donate button lets keep this project going and hope we can get the ESP32 in the mix. BEGINNERS GUIDE HERE http://www.esp8266.com/viewtopic.php?f=40&t=6732

Where I buy my ESP8266 boards from... (Banggood)