ESP32 Forum

Dear community,
I am fighting crashes on my IoT devices without being able to solve the problem.
The devices are connecting to Wifi and send and receive Websockets request that are Json-Encoded.
I use the following libraries:
-ArduinoWebsockets
-ArduinoJSON
Coding in Arduino IDE with ESP8266 tools installed (Version 2.6.3)
The debug logs (decoded with the Arduino plugin) give the below output:
I am not sure how to locate the error and how to read these stack results. Is it the last executed commands in backwards order?
Thank you very much for your help!

You have an esp8266, not esp32. https://github.com/esp8266/Arduino/issues

EDIT (12may2021): I discovered that one problem occurred when parsing the json that came in via websocket. ESP kept running with fastled performing a default function, but ESP got stuck once json was being parsed (done in the main loop when receiving it via websocket). At this time I had defined StaticJsonDocument<200> jsondoc outside of setup() and outside of loop().

The solution was to add StaticJsonDocument<200> jsondoc INSIDE of the main loop, just before the parser, see code below.

QUESTION ADDITIONAL REGARDING STRINGS IN RELATION TO JSON:
I am using String fromIn = jsondoc["from"]; to retrieve the values from the parser. In other posts I read that this should not be done in this manner (using String). Does anybody have a better way to do this? I believe this is bad for memory allocation or so.

=======================================================

// this is an example of data that is comming in:
// {"from":"ESP","msg":"PROBEOKE","mac":"7c-9e-bd-d2-ed-9c-","time":"19326"}

StaticJsonDocument<200> jsondoc; // <== THIS IS WHAT I ADDED FOR THE SOLUTION
DeserializationError err = deserializeJson(jsondoc, data);
if (err)
{
Serial.println("error deserialization");
Serial.println(err.c_str());
return;
}
if (jsondoc["from"]) // check if not null before dereferencing
{
String fromIn = jsondoc["from"];
String toIn = jsondoc["to"];
String actionIn = jsondoc["action"];
String msgIn = jsondoc["msg"];
}
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ORIGINAL POST
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I am working with ESP32, Wifi + WebSockets + ArduinoJson + Fastled and experiences crashes also.

It seems to run fine until I implement FastLed. I am sending instructions from nodejs (what leds to turn on etc) via websocket in json-format. It crashes when fastled.show(); is invoked;

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just before the error occurs and crashes, the jsonparser stops working (results in null on all values)
then this error pops, and the esp is nonresonsive, the error message is even not completed

Guru Meditation Error: Core 1 panic'ed (StoreProhi
=======================================================
hardware:
board: huzzah32 feather
leds: ws2815
=======================================================
platformio.ini:

[env:huzzah]
platform = espressif32
board = featheresp32
framework = arduino
lib_deps =
bblanchon/ArduinoJson@^6.17.3
ottowinter/ArduinoJson-esphomelib@^6.15.2
fastled/FastLED@^3.4.0

=======================================================
This is the warning message I get when uploading to the board (not sure if it is related to the crash):

In file included from src\main.cpp:38:0:
.pio\libdeps\huzzah\FastLED\src/FastLED.h:14:21: note: #pragma message: FastLED version 3.004.000
# pragma message "FastLED version 3.004.000"
^
In file included from .pio\libdeps\huzzah\FastLED\src/FastLED.h:65:0,
from src\main.cpp:38:
.pio\libdeps\huzzah\FastLED\src/fastspi.h:135:23: note: #pragma message: No hardware SPI pins defined. All SPI access will default to bitbanged output
# pragma message "No hardware SPI pins defined. All SPI access will default to bitbanged output"
=======================================================