main.py don't start after poweron

[lukesky333]

Hello!!!

I'm new here and I've already my first problem. I tried a lot of code snippets and everything is working like expected.

Now I tried create a main.py file, that should start after poweron of the board. ...but it is not working.

Could anybody give me a hint how to do that?

I'm using the development board "Witty Cloud" with the ESP-12F.

Thanks a lot...

[platforma]

How did you "create" the file? Perhaps you can walk us through what you have done so far and what output you get, that makes you think it's not working?

[lukesky333]

Yes, of course...

At first I installed the firmware esp8266-20160901-v1.8.3-81-g9c04ef2.bin and then I create a new boot.py and main.py file with Vi.

here the content of "boot.py":

Code: Select all

import webrepl
print("boot.py loaded...")
webrepl.start()

content of "main.py":

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import esp
import machine
import time

def toggle(p):
   p.value(not p.value())

def main():
    pin = machine.Pin(2, machine.Pin.OUT)

    for i in range(10):
        toggle(pin)
        time.sleep_ms(500)
       
if __name__ == 'main':
    print("main entered")
    esp.osdebug(0)
    main()

Now I flashed the latest firmware esp8266-20160905-v1.8.3-112-gb4df3e7.bin but main.py is still not running...
What could be the reason for that?

EDIT: It seems that main.py is loaded but main() not executed... Why?

[pythoncoder]

I think one of the things @platforma was after was how you transferred the two files to the ESP8266. However if it's now working then you've evidently done this successfully

[lukesky333]

For file transfer I'm using mpfshell.

The problem is, that main.py is loaded but main() not executed... Any idea why???

EDIT: OK, sorry for that stupid question/problem.
wrong:

Code: Select all

if __name__ == 'main':

correct:

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if __name__ == '__main__':

[Roberthh]

Just to ask a few simple questions:

Do you see the message printed "main entered", e.g. after reboot with Ctrl-D?
How do you tell that main() is not executed. Did you try a print statement inside main(), just to sort our any connection issue with the LED?

[lukesky333]

Do you see the message printed "main entered", e.g. after reboot with Ctrl-D?

Yes, I see... After fixing the code everything is working like expected.

How do you tell that main() is not executed. Did you try a print statement inside main(), just to sort our any connection issue with the LED?

Not yet, but the code is working now.

Thanks a lot for the help!!!

[platforma]

Easy mistake to get caught out on, glad you got it working!

[poduris]

Hi,
I'm new to ESP & Micropython, I wanted to run micropython code by including it in firmware .....I get following error on powering on NodeMCU.
"could not open file 'main.py' for reading"

I did following

1) Built esp sdk toolchain using documentaion available at
https://learn.adafruit.com/building-and ... d-firmware
2) Created main.py with following code at "/home/vagrant/micropython/esp8266/scripts" on ubuntu VM
3) compiled firmware & copied it to /vagrant folder
4) Flashed the firmware on NodeMCU using esptool.py

I'm not able to find out what went wrong....

import machine
pin = machine.Pin(5, machine.Pin.OUT)

import time

for i in range(100):
pin.value(1)
time.sleep(0.25)
pin.value(0)
time.sleep(0.25)

[Roberthh]

Two questions:
a) How much flash has your device? For a file system, at least 1 MByte is required. You can tell by exectuing

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 import port_diag

from the command line
b) Try to erase the flash before loading micropython. Issue

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esptool.py erase_flash