geda / hx711-lopy Goto Github PK

Hey thank you for the library.

I have been running into an error when I run a script that calls your library.

here is a copy of the error:

Traceback (most recent call last):
File "", line 45, in
File "hx711_pio.py", line 44, in init
OSError: [Errno 12] ENOMEM

Here is my line 45:

hx711 = HX711(pin_SCK, pin_OUT)

The script works if I reset the machine or run it the first time power has been connected, but then if i run it more than once I get the error.

Any ideas how to solve this?

Thanks,

Tray S.

This is a very well set-up class for the HX711. However, the clock timing seems odd. Looking at the clock signal with an logic analyzer, I've seen excessive long positive clock pulses, like 130µs. A clock pulse of 50µs and longer will however put the device to sleep. Better change the few lines of method read into:

                state = disable_irq()
                self.pSCK.value(True)
                dataBits[j][i] = self.pOUT()
                self.pSCK.value(False)
                enable_irq(state)

and change the first line of the script into

from machine import Pin, enable_irq, disable_irq

That avoids interrupts during the high cycle of the clock. Maybe then the "all true" events are gone.

Hi

Can you help me with the process for calibration and use for the script scale.py
Im using hx711_spi.py on esp32 microcontroller.

thanks in advanced.