Hi! I fscked up. The file esp8266.bin (md5 55eb884ecb257da22d9992a802134ff7) I posted on the forum is actually corrupt, due to a protocol bug in esptool which have been since fixed. The md5 of the new, hopefully correct file is 7b52074c61442ee4c45f59d026313fa3. I have also created a disassembly with symbol names in iram0.txt. br kongo Sun Sep 7 21:56:18 CEST 2014