ESP8266 Developer Zone The Official ESP8266 Forum 2015-10-14T16:31:16+08:00 https://bbs.espressif.com:443/feed.php?f=16&t=1228 2015-10-14T16:31:01+08:00 2015-10-14T16:31:01+08:00 https://bbs.espressif.com:443/viewtopic.php?t=1228&p=4105#p4105 <![CDATA[Re: AT v0.50 - ESP01 don't responding after programming]]>

Statistics: Posted by hexor — Wed Oct 14, 2015 4:31 pm

]]> 2015-10-14T16:31:16+08:00 2015-10-14T00:44:45+08:00 https://bbs.espressif.com:443/viewtopic.php?t=1228&p=4095#p4095 <![CDATA[[RESOLVED] AT v0.50 - ESP01 don't responding after programming]]>

I have flashed my esp01 (4Mb) with the ATv0.50 non boot mode:
at_0.50.JPG


The software "say finished", so I power off the esp01, retire the GPIO0 of GND, put ON the power supply, and nothing.... The blue led flash one time, the red led is ON.
I try to send command to the esp, no responding.... (the TX led of my FTDI flash, but the blue led of the esp don't flash at all...).
At the power up I can see this on the serial line:

ònnäÄ;ònEÜä

à$ rrpònàÃÜ
?Àl


bÀnâãnÀÄ

p

ònnîÄÁ
l`üÜ#nÀrnr;ÄÀ
?
rÇpònàÃÜ
àâÇÀl
Ç

bÀnâãnÀ$ìãl

l
bÄ>~ònîÄà
r


The wiring is:

TX > RX of my FTDI
CH_PD > VCC (3.3V)
RST > nothing
VCC > VCC (3.3V)
RX > TX of my FTDI
GPIO0 > GND when programing, nothing when I use the esp
GPIO2 > nothing
GND > GND

The 3.3V is from a laboratory power supply.

Have you some idea for resolve this problem ? :?


Thanks in advance,

Statistics: Posted by hexor — Wed Oct 14, 2015 12:44 am

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