Gateway ESP8266 Wifi resets after connecting to router

[CurlyWurly]

I have had the same problem - the ESP8266 MQTT gateway device just "WDT resets" when a sensor device tries to send a message.
*EDIT 081016
In my case, I was using a yellow 0.9 dev board which has a known "screen print" error for pins GPIO4 and GPIO5 - I just swapped these pins over and all was OK - no crashes anymore.
https://twitter.com/bdcatalin/status/663434209265078272

[CurlyWurly]

This post is deleted!

[Harry van der Wolf]

@Petjepet
Please see this specific post on pimatic: https://forum.pimatic.org/topic/2234/external-selfmade-pimatic-max-thermostat-control-with-esp8266/17 for an EspEasy esp8266

This guy has the exact same crash and he set the spiffs-flash-size to 1M, and then it functioned.

[Petjepet]

@Harry-van-der-Wolf thank you for the info!

I'm not so familiar with these hardware items: what is the 'spiffs-flash-size' and how to adjust it?

[Harry van der Wolf]

In your Arduino software under "Tools" ("Hulpmiddelen" assuming you are using the Dutch version) you select the platform you flash for. In this case probably Nodemcu 0.9 or Nodemcu 1.0.
In that same menu you have "Flash size". In that submenu you can select 4M(3M SPIFFS) and 4M(1M SPIFFS). Default is the first one but in your case try the second one.

SPIFFS is SPI Flash File System. See here: https://nodemcu.readthedocs.io/en/master/en/spiffs/

[Petjepet]

@Harry-van-der-Wolf I tried your suggestion without luck.
I'll wait for my other MCU to arrive and try again.

[Harry van der Wolf]

I accidentally ran into this topic for a completely different reason. One of the posters mentioned that he had the same issues as you have due to an unstable power connector.
Another try?

[TheoL]

This post is deleted!

[Petjepet]

@Harry-van-der-Wolf thank you for this interesting link.
When using a more stable (other than PC-usb, iPad charger, decicated USB 2A power outlet??) other then USB, how would I be able to feed the module and also Monitor its behaviour with the Arduino IDE?

[Petjepet]

Today arrived the new MCU (as presented in the shop) and I uploaded the sketch.
Still no success, but with again a new error code:

ets Jan  8 2013,rst cause:4, boot mode:(3,7)

wdt reset
load 0x4010f000, len 1384, room 16 
tail 8
chksum 0x2d
csum 0x2d
v3de0c112
~ld

mode:(3,6) changed to mode:(3,7)

I powered by USB on PC (for serial Monitor), USB on 2.0A output and seperate 5V directly to pin on MCU (how to monitor when not using USB on MCU?).
It won't work. I think the concept is not stable enough (resets are common issues I see on the net).

I'll have to give up on this I guess.

[Petjepet]

I gave it a try again by using some suggestions on the net like changing the radio CS connection from GPIO15 to GPIO5.
No effect.

In the comments of the sketch I read:

 * Not all ESP8266 modules have all pins available on their external interface.
 * This code has been tested on an ESP-12 module.
 * The ESP8266 requires a certain pin configuration to download code, and another one to run code:
 * - Connect REST (reset) via 10K pullup resistor to VCC, and via switch to GND ('reset switch')
 * - Connect GPIO15 via 10K pulldown resistor to GND
 * - Connect CH_PD via 10K resistor to VCC
 * - Connect GPIO2 via 10K resistor to VCC
 * - Connect GPIO0 via 10K resistor to VCC, and via switch to GND ('bootload switch')

I guess these are not needed when using the NodeMCU as presented in the MySensors store?

[Harry van der Wolf]

It is not necessary for any esp8266 having a usb port as you program these directly via that usb port.
So. indeed: the nodemcu doesn't need it and neither does the Wemos.

The esp-07, also available, does need that setup to flash/program it.