I have ESP-01, ESP8266, 8Mb I'm able to flash the nodemcu_float_0.9.5 ok,

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1

I have ESP-01, ESP8266, 8Mb I’m able to flash the nodemcu_float_0.9.5 ok, and then use ESPlorer on baud 9600. Responds ok, I’m able to connect and load innit files.

I tried to use the custom nodemcu firmware builder with the latest flasher tool, repeating the same flashing process as for the step above, the flash is successful but ESPlorer cannot establish the connection - acts like the baud rate is not correct.(random symbols populating the window) At this point I have tried all the baud rates and all the firmware types (master, dev and frozen).

Any advice?

2

There’s an autobaud detection so you want to press Enter several times until it detects the serial speed your terminal uses. Also, start with 115200 8N1, the 9600 is not used since ages.

3

@Petr_Stehlik I have used all bauds on ESPLorer dropdown, only works for the 0.9.5 firmware, not a single one available communicating correctly with the custom builds from nodeMCU website

4

Then you might want to replace the SDK Init data: http://nodemcu.readthedocs.io/en/master/en/flash/#upgrading-firmware

5

@Petr_Stehlik I’ll take a look this evening. But wouldn’t that be something to do with the firmware? I was able to flash the 0.9.5 back on ESP without any problems. Just each time i want to try the builder flash shows a successful process but ESLorer talks jibberish across all bauds

6

The firmware cannot boot without proper SDK Init Data. That could explain it.

7

What @Petr_Stehlik ​ said.

8

Erasing the firmware as per hint in the link helped thanks.