ESP8266 Community Forum

Posted: **Sun Jan 07, 2018 2:15 am**

Hi
I have a lolin3 and NodeMCU V3.

Code is running on lolin but not on NodeMCU.

anything to check and take off?

Compiled and uploaded with same options via Arduino IDE

Exception (3):
epc1=0x40212e74 epc2=0x00000000 epc3=0x00000000 excvaddr=0x400d01b9 depc=0x00000000

ctx: cont
sp: 3fff2ee0 end: 3fff3160 offset: 01a0

>>>stack>>>
3fff3080: 3fff2050 00000208 00000208 4010020c
3fff3090: 400d01b9 3fff1c8c 3fff30c0 40100690
3fff30a0: 3fff46c4 2e383631 3fff2078 4020f535
3fff30b0: 3fffdad0 3fff1c8c 3fff2078 40206248
3fff30c0: 00000000 00000000 00000000 feefeffe
3fff30d0: feefeffe feefeffe feefeffe feefeffe
3fff30e0: feefeffe feefeffe 3ffeb048 a000a8c0
3fff30f0: feefeffe feefeffe feefeffe feefeffe
3fff3100: feefeffe feefeffe feefeffe feefeffe
3fff3110: feefeffe feefeffe feefeffe 3fff44ec
3fff3120: 0000000f 0000000d feefeffe feefeffe
3fff3130: feefeffe feefeffe feefeffe 3fff2138
3fff3140: 3fffdad0 00000000 3fff2130 40210f20
3fff3150: feefeffe feefeffe 3fff2140 40100710
<<<stack<<<

ets Jan 8 2013,rst cause:2, boot mode:(3,7)

Posted: **Sun Jan 07, 2018 9:53 am**

You need to install the Exception decoder and post its output.

Posted: **Mon Jan 08, 2018 6:29 am**

Sorry, if you guys think I'm highjacking this thread, just tell me and I'll shut up :-)

It's just that I have a similar problem... at least I think so.

I followed the tips of dragodaud and here is my decoded exception(3):

Code: Select all

Decoding 12 results
0x4010068c: free at C:\Users\rwesthed\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.3.0\cores\esp8266\umm_malloc/umm_malloc.c line 1733
0x402049fe: String::operator=(String&&) at C:\Users\rwesthed\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.3.0\cores\esp8266/WString.cpp line 73
0x40202381: ShowValuesOnDisplay() at C:\Users\rwesthed\Documents\Arduino\Wemos\OilLevel_Sens_v06_WebServer_OLED\OilLevel_Sens_v06_WebServer_OLED/OilLevel_Sens_v06_WebServer_OLED.ino line 483
0x40204531: Print::write(char const*) at C:\Users\rwesthed\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.3.0\cores\esp8266/Print.cpp line 76
0x4020342a: WiFiServer::available(unsigned char*) at C:\Users\rwesthed\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.3.0\libraries\ESP8266WiFi\src/WiFiServer.cpp line 109
0x4020455c: Print::println() at C:\Users\rwesthed\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.3.0\cores\esp8266/Print.cpp line 76
0x40201436: delay at C:\Users\rwesthed\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.3.0\cores\esp8266/core_esp8266_wiring.c line 53
0x402026d0: loop at C:\Users\rwesthed\Documents\Arduino\Wemos\OilLevel_Sens_v06_WebServer_OLED\OilLevel_Sens_v06_WebServer_OLED/OilLevel_Sens_v06_WebServer_OLED.ino line 273
0x40203b68: MicroOLED::clear(unsigned char) at C:\Users\rwesthed\Documents\Arduino\libraries\SparkFun_Micro_OLED\src/SFE_MicroOLED.cpp line 383
0x402021ea: setup at C:\Users\rwesthed\Documents\Arduino\Wemos\OilLevel_Sens_v06_WebServer_OLED\OilLevel_Sens_v06_WebServer_OLED/OilLevel_Sens_v06_WebServer_OLED.ino line 483
0x40204be0: loop_wrapper at C:\Users\rwesthed\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.3.0\cores\esp8266/core_esp8266_main.cpp line 56
0x40100718: cont_norm at C:\Users\rwesthed\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.3.0\cores\esp8266/cont.S line 109

This doesn't mean anything to me I'm afraid. I can paste the code as well but will do so only by request (not to steal to much space since it's not my thread).

Best regards,
Richard

Posted: **Tue May 22, 2018 3:16 pm**

hi

after some days now it "seem" that i could solve ( for me ) this RST issue..
my setup:

node mcu v3 / LoLin ( ebay ) - on top: nRF24+
i use nRF24Mesh to transfer wifi scan data to a master
basically the wire ( RF24 ) is the same on both ( slave or master )
BUT: on slave i periodically got RST..on Master Never!?
what i tried:
almost everything i found here concerning this issue!
Isolated different functions
...slave fired the RST without a logical "pattern"

Here is what i do the moment to fix this for me:

ordered this dev-board: baseboad:
https://www.amazon.de/gp/product/B06XHG ... UTF8&psc=1

and for the rf24 this:
https://www.amazon.de/gp/product/B06Y62 ... UTF8&psc=1

wired all together ( same SW ) and the RST is /was gone ..this work now for 4hrs...

So it seem that my issue came from bad/weak power supply!? before i used the on borad plug ( USB ) from MCU...as said on the Master no problem. It MAY be that the esp promiscuous ( is only on slave used!! ) has some impact on the power consumption? I even ordered a "powered USB-HUB" before...without success. Only this "extra" power supply seemed to fix the issue.

So - for the moment it is fine ..i will take this know how on the dependency of a propper power supply as a BASE-LINE .

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