I tested most recent release with several ESP8266 modules. Afer rebuilding firmwares and flashing they either don’t boot up / boot with errors and crash after several seconds / periodically disconnect from local MQTT server (very strange). Downgraded to 2.13.0 and everything is fine.
I’ve run into some issues with the AWS-IOT, but it was something related to the certificate.
Try adding the debug flag “mos config-set debug.level=3” into the mos console. Maybe that will give you a better insight of what is going on.
Thanks for the suggestion! My issues were created by adding some PWM code. Had to disable it completely. Very strange stability problem… Now returned to 2.14.0 and everything works!