MicroPython Forum (Archive)

I have started learning micropython today. I have successfully flashed my ESP8266 with latest stable micropython firmware, configured it with my router and was able to run webrepl.html with python prompt.
Now as I was following the tutorial https://docs.micropython.org/en/latest/ ... ystem.html I saw that there should be two automatic script boot.py and main.py. os.listdir() showed me there is only one boot.py. so I created one main.py containing a simple script


when I press the reset button and reconnect to webrepl, nothing happens. However when I type -> it runs and list the files. What am I missing? Also nothing happens if I download boot.py from device via webrepl, put these lines in it and reload it back.

I know this is very basic but pardon my ignorance as today is my "Hello World" day to Micropython.

I am on windows 10 pro but I guess that does not matter on a browser based interface.

My guess is that it does run, but by the time you connect again, you have missed the output already. Try working with a serial connection (which, unlike WebREPL, isn’t disconnected at reset) or adding some delay into the script so you can catch it before it’s done.

My project requires mobility. Can a serial connection be made with WiFi ? I am just beginning, so have no clear idea.

No (unless you use some kind of external UART-to-WiFi bridge). So that leaves the second option (adding a delay). Or use something other than console output to check if your script runs, e.g. blink an LED or write to the filesystem.

Is it possible to interface with the board directly via a python program running on command prompt? The connection should be WiFi.

Yes, you can write a program on the micropython that receives commands over wifi from a host program running on your PC.

Here's a simple web server for MicroPython that comes with an example of controlling GPIO pins remotely. https://github.com/miguelgrinberg/microdot

For a more complete solution, maybe check out https://github.com/peterhinch/micropython-iot

Yeah Peter himself is helping me out with that in another thread