@matth1187 I didn’t realize MYSBootloader has watch dog timer set on by default Wdt_reset(); at end of loop fixes that

@matth1187 hi there, "Does MYSBootloader prevent me from uploading sketch to a node via IDE. so in otherwords a node with MYSBootloader can only be program with OTA and not from serial/arduino ide?" I'm allso still wondering about this. At first i had my nodes programmed via ftdi and arduinoIDE, then burned mysbootloader and could start OTA (allthough it didn't seem to succeed). I could then still program the nodes via ftdi (atleast arduinoIDE didn't throw an error and would write). Then i tried burning bootloader and then program with usbasp using shift-upload in arduinoIDE. When powering on nodes mycontroller can still descover them but when requesting firmware OTA i would only see "nodeID/255/4/0/1" in mqtt client but no response. So i'm still very confused. Did you find an answer to this question? Thanks

@jkandasa Okay, will test as soon as my external flash arrives! (sorry for the delay.... tought i had the i2c flash around but unfortunately not...)

OK, my mistake there. The Node // Firmware Name was empty. (It has been discarded when node has been deleted) Now it works like a charm. Thanks for you attention.