ESP8266MOD: No WiFi connection - program code issues

Question

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The topic is about this version of the mod

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There is practically nothing in the program and it constantly resets itself.
As I do not attach the WiFi support the module itself when blinking the diode works.

Is the module defective or am I doing something wrong?

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khoam · Accepted Answer

In the board settings, change Erase Flash to All Flash Contents and reload the programme.

sylweksylwina · Answer

Power supply all correct? I.e. you're probably powering from USB anyway, but you could check that the voltages are correct after the stabiliser etc.

Exception indicates a problem with program execution, if it is caused by WiFi code then maybe try clearing memory and uploading new firmware.

rst cause 2 it looks like the reset button was pressed.

Don't do so many delays because if you start to complicate the code, it will start to watchdog reset the board (rst cause 4).
You can give yield() in the main program loop.

dasej · Answer

I fed 3.3V from the power supply behind the stabiliser and still the same. The button is working, when I hold it down the ESP does not start. I added a delay so that ESP resets more slowly.

Anonymous · Answer

Delay in esp does not exist Code: C#Log in, to see the code .

khoam · Answer

@dasej Install a plug-in for the Arduino IDE called ESP8266/ESP32 Exception Stack Trace Decoder . You will then know specifically where the program is crashing. Otherwise, it's a search in the dark. Link . . Really? Code from Arduino Core for ESP8266 below. It is certainly less blocky than what you presented in your post.Code: C / C++Log in, to see the code Added after 4 [minutes]: . Nonsense. The delay() function in the ESP8266 does not block the execution of other threads or the operation of the WTD.

Anonymous · Answer

Well I also have from Arduino CORE for ESP8266.... And my general issue is that the delay doesn't block, but flips to other threads Wifi support etc in this WDT.... Sometimes even advisable to use delay in esp....

dasej · Answer

@khoam . I received something like this back. Code: IniLog in, to see the code . Added after 1 [minute]: @Jarzabek666 . My dear reader, we are not writing here about DELAY.

dasej · Answer

@khoam Many thanks works. Two words of explanation.

khoam · Answer

You can go back to Only Sketch. The whole process of loading the code will be faster. Added after 1 [minute]: . There was rubbish in the flash area where the settings for the WiFi network are stored. Unfortunately the WiFi.begin() function doesn't clear this, it just sets those parameters you specified in the program.

sylweksylwina · Answer

Okay I actually got something mixed up, although I try to avoid delays anyway, maybe that's what got me worked up. Although I'll admit honestly that I haven't figured out the basics like delay in the source files.

Stack trace decoder would indeed help to track down the problem, although with this simple program it probably helps just to tick "erase all flash contents". Sometimes things can go wrong in the configuration and circuses happen.

dasej · Answer

Many thanks for your help @khoam

[Solved] ESP8266MOD: No WiFi connection - program code issues

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