ESP8266 Community Forum

- Wed Feb 24, 2016 5:23 am #41792 Thanks for quick answer. I have erased the whole flash. Now, where can I find the new firmware which I should put on chip?

btw. SDK on the chip is

Code: Select allSDK: 1.5.1(e67da894)

- Wed Feb 24, 2016 9:10 am #41800 Since we are in the Arduino sub-forum, I presume you are uploading Arduino sketches ...
The firmware is builtin along the sketch binaries. Depending of Arduino core version you use, it will vary.
You can print the version from inside your sketch :

Code: Select allSerial.println(ESP.getSdkVersion());

- Wed Feb 24, 2016 11:48 am #41808 Oh, okay. Here is what I get:

Code: Select allchksum 0x42
csum 0x42
1.3.0


1.3.0. is the SDK, I guess.

One more thing. If I try to upload once more, without plugging out the USB or resetting the board, I am unable and get this error:

Code: Select allwarning: espcomm_sync failed
error: espcomm_open failed

- Wed Feb 24, 2016 2:37 pm #41819 If you are using the circuit you've mentioned http://i67.tinypic.com/2lv003l.png, then in Arduino IDE you need to set "Reset Method" to NodeMCU, because "ck" mode won't do any reset.