problem with NodeMcu ESP8266

Hi

I seem to have broken two of these

I have load WiFiscan from the examples for the ESP 8622
all was working well

after playing around for 30min the serial monitor is shown this

Exception (29):
epc1=0x4000e1b2 epc2=0x00000000 epc3=0x00000000 excvaddr=0x00000000 depc=0x00000000

ctx: cont
sp: 3ffef7c0 end: 3ffefaf0 offset: 01a0

stack>>>
3ffef960: 00000484 00000484 000003fe 401004f4
3ffef970: 00000000 00001000 000003fe 40106dd4

see attachment

3ffefad0: feefeffe 00000000 3ffeeab4 40202910
3ffefae0: feefeffe feefeffe 3ffeead0 40100718
<<<stack<<<

ets Jan 8 2013,rst cause:2, boot mode:(3,6)

load 0x4010f000, len 1264, room 16
tail 0
chksum 0x0f

can some one please tell me what I have done

I trial and error I have found that if I remove line 13 i.e. WiFi.disconnect();

it works and I get this on the monitor

scan start
scan done
9 networks found
1: BTHub5-6SQ5 (-89)*
2: BTWifi-with-FON (-89)
3: BTWifi-X (-91)
4: BTHub5-T9CT (-78)*
5: BTWifi-with-FON (-72)
6: BTWifi-X (-78)
7: BTHub4-C5H2 (-60)*
8: BTWifi-with-FON (-61)
9: BTWifi-X (-61)

John

monitor.txt (1.52 KB)