ESP8266 Community Forum

version 2.7.4 sender sketch ESPnow works flawless
version 3.0.0 not working anymore

exception decoder says the following:

Exception 0: Illegal instruction PC: 0x40201181 EXCVADDR: 0x00000000
Decoding stack results
0x40201140: receiving() at C:\Users\Gebruiker\Documents\ArduinoData\packages\esp8266\hardware\esp8266\3.0.0\cores\esp8266/HardwareSerial.h line 166
0x402010ec: setup() at C:\Users\Gebruiker\Desktop\GOSSE-NIEKE\sketchbook\nodemcu\espnow\MA_Esp_zend/Csetup.ino line 20
0x40202018: loop_wrapper() at C:\Users\Gebruiker\Documents\ArduinoData\packages\esp8266\hardware\esp8266\3.0.0\cores\esp8266*core_esp8266_main.cpp* line 201

to me it looks there's something at fault in the new code for the core

rolf

you won't likely reach any devs here, better open an issue over at github.

and yes, core 3.0.0 is full of "breaking news"

Yeah, the new version has many flaws, I have read many such posts complaining about v3.0. So, it's better to stick with the older version.