NodeMCU No answer to probe


Hi I am just getting started with Zerynth, having the problem below when I attempt to upload the ‘hello world’ script. My NodeMCU is continually flashing a blue light also. 

[info] Got header: 33540000200000a794000b00000a026a
[error] No answer to probe


Hi robmarkcole,

The header you got seems like you have not virtualized the device; try to create and virtualize the device following the steps as shown in the guide.

Let me know if this can solve your issue.


You were correct, my bad, thanks!


hello everyone i am new to zerynth i have this issue cant solve it can some one help me please i have installed the cp2102 drivers but when i try to virtualized my nodemcu it gives me these msgs

[info] Starting device registration
[info] Burning bootloader… v1.3-dev
A fatal error occurred: Failed to connect to ESP8266
[error] Can’t burn bootloader! --> v1.3-dev
A fatal error occurred: Failed to connect to ESP8266