ESP8266 crashes with receiver enabled

Jovan Stosic December 12, 2018

Changes I did:
Have the protocols in RAM
#ifdef ESP8266
// because of timing reasons we keep that in memory on esp8266
static const RCSwitch::Protocol proto[] = {
#else
static const RCSwitch::Protocol PROGMEM proto[] = {
#endif

Changes to receiveProtocol (called by ISR)
#ifdef ESP8266
bool ICACHE_RAM_ATTR RCSwitch::receiveProtocol(const int p, unsigned int changeCount) {
#else
bool RCSwitch::receiveProtocol(const int p, unsigned int changeCount) {
#endif

Source: https://github.com/sui77/rc-switch/issues/46

A fatal error occurred: Failed to connect to ESP32: Timed out waiting for packet header – Google Search

Jovan Stosic December 10, 2018

on Issue 1: Arduino is configured with both cores already when built, so nothing else is required.
on Issue 2: Could you try to lower the flashing speed? You seem to have selected 921600 and I have seen that to fail on my mac too. Try with 115200 as a safe net and report how that goes. To note, I have had success with many baud rates with FTDI chips, but not the same with others. Silabs seems to be better than WCH, but not quite as good as FTDI.

Source: https://github.com/espressif/arduino-esp32/issues/333