MicroPython Forum

The other possibility is that picocom is working fine and that the MCU hasn't been flashed with micropython properly.

What device are you trying to connect to? The pyboards show up as /dev/ttyACM0 and not ttyUSB0. Make sure that there isn't some other program running which is using the same port (EDIT: I see that you're connecting to an ESP device, so this comment probably isn't relevant) You can use the lsof comma...

starter111 wrote: ↑

Fri Sep 06, 2019 9:34 pm

why you need pyusb? pyserial doesn't work?

pyusb is needed to DFU flash the pyboard (at least if pydfu.py is being used).

One thing to check is your boot.py file on the board.

If it has a call to pyb.usb_mode which doesn't include MSC in the string then the pyboard won't show up as a drive.

If your mpconfigboard.h file only defines LED1 and doesn't define LED2, then the code will use a slightly different behaviour. Instead it will flash the LED 1, 2, or 3 times.

See: https://github.com/micropython/micropyt ... ain.c#L328

Looking at the documentation for uos:
https://docs.micropython.org/en/latest/library/uos.html

It would appear that you need to use

If your module directory is stored inside a directory called zeze then you need to add the zeze directory to your sys.path in the main.py file before you try to import it. Otherwise micropython doesn't know where to look.

The way that servos work is that they send a 1-2 msec long pulse at about 50 or 60 Hz. Lets say we wanted to use 50 Hz. That corresponds to a period of 20 msec. Since we want the pulse to be between 1 and 2 msec, then we want it to be between 1/20 = 0.05 and 2/20 = 0.10 or 5-10% The duty is specifie...

Often, if the system becomes unresponsive when enabling interrupts it happens because an interrupt fires and the reason for it firing doesn't get cleared, so the interrupt immediately fires again. This means that the foreground never gets a chance to run.

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