ESP8266 Community Forum

I'm quite new in the 8266's world and I need some help.

First of all, I'm going to tell you what is my experience so far:

- I bought two NodeMcu LoLin V3 boards (I also have a esp8266-f SoC I've been successfully using to connect an Arduino board to Wifi)

- I bought Kolban's book about ESP8266 (I've read it more or less in depth depending on my interest in each topic)

- I installed Arduino IDE's extensions for programming ESP8266 modules and I was able to play with various test programs (AP listing, led blinking, etc.).
I used the "NodeMCU 1.0 (ESP-12E Module)" option under "ESP8286 Modules" (I'm telling it because maybe it's important let you know)

So far so good, then I tried to take a step further and start to play with the SDK (No OS). In this regard, I followed these steps to set up de environment:

- I installed (over Windows 7 ultimate 64 bits):
* Eclipse IDE for C/C++ Developers (Oxygen.3a Release (4.7.3a))
* MinGW (i686-posix-dwarf-rev0, Built by MinGW-W64 project) 8.1.0
* Core Utils 5.3.0 (aka GnuWin32)
* Latest Unofficial Development Kit for Espressif ESP8266 (http://dl.programs74.ru/get.php?file=Es ... 8266DevKit)

The problems arose when I tried some examples (blinky & blinky2 to be more precise) and nothing seemed to work:

I built the binaries objects from Eclipse (eagle.flash.bin & eagle.irom0text.bin) and then I flashed the board with them (from Eclipse itself and using nodemcu-flasher, eagle.flash.bin to 0x00000 and eagle.irom0text.bin to 0x10000 and
playing with different value for Flash Speed and SPI Mode). After flashing, I reset the board with the integrated switch and nothing happened: no led blinking and nothing was written to the UART0 (from os_printf's added by me in order to do some debug)

Could someone help me?

I'll be glad to add any extra info needed

Thanks in advance

Best regards

Hi, I have a very similar setup to yours but
Windows 10 64 bits
Eclipse CDT 2019-03 (latest)
mingw-get version 0.6.3-pre-20170905-1 (directly from mingw.org)
and of course the very same Unofficial Development Kit

I´ve also been successful with Arduino IDE so far

As far as I know the board I´m using (a Wemos D1 mini clone) should be pretty similar to yours:
4Mb flash which should be SPI mapping 4 or 6 (6 if i take into account that using Arduino IDE with 1Mb SPIFFs works for me)

So, the sad part is that I get random resets or garbage in the serial terminal, I am able to see part of the programs executing if I use the no boot option and flash (exactly as you did). I also tried the blinky without modifications and I can see the led flashing but after a while I get random errors and the board resets.

My guess is just that I got a little but further than you (not there yet).... At least I can see something going on over UART

As for suggestions it comes to mind:
- I am assuming you attempted to replicate Arduino IDE settings
- Did you check viewtopic.php?f=9&t=820 thoroughly? Just double checking, I know there is a list of packages that need to be in your MinGW installation, there is even a script that automates the whole thing

I think I will try to adhere to these instructions and reinstall everything, hope this reply helps somehow ... would you let me know if you get it working?

Best of luck!!

I just thought of something else, I know that blinky is set up to use GPIO2 and that matches with my board's pinout , did you double check yours? It may be (hopefully) an easy to fix mistake...