Lopy vs. L01 differences

[Thosch42]

Hi all!
I switched my hardware from Lopy + Expansionboard v2.1A to L01 + Baseboard + Expansionboard v2.1A. I expected no problems. But there are loads of it.
First of all, I'm not able to modify the output states of the pins.

For e.g.

from machine import Pin

pin_en = Pin('P23', mode=Pin.OUT)
pin_en(False)

simply does nothing.

What could be wrong?

Cheers,
Thomas

[livius]

@thosch42 said in Lopy vs. L01 differences:

P23

do you have SD card?
P23 is SDCLK

[Thosch42]

@livius
No. No SD card. I just replaced a Lopy + Deepsleep Shield with a L01 + Baseboard. Same script (except the deepsleep part), same peripheral hardware.

Cheers,
Thomas

[Thosch42]

Ok, I found the main problem. After cleaning up the soldered pads of the L01, it works so far.

But the pin.hold while in deepsleep seems not to work. Is there another difference between the normal deepsleep and the deepsleep via Deepsleep Shield?

Cheers,
Thomas

[jcaron]

@thosch42 Not sure of the details, but this may vary between pins, as I believe some of the pins are controlled by parts of the ESP32 that remain active during deep sleep while others aren't.

[seb]

@thosch42

Only pins that are in the RTC power domain can hold a value during deep sleep. These are: P2, P3, P4, P6, P8, P9, P10, P13, P14, P15, P16, P17, P18, P19, P20, P21, P22, and P23

[jcaron]

@seb This should probably be added to https://docs.pycom.io/chapter/firmwareapi/pycom/machine/Pin.html ?

[Thosch42]

Yepp, P23 and P22 are the relevant pins in my design. But at the moment, this is my least problem. The L01 seems to be dead. The 1.8V voltage is not there...

Hopefully I get the L01 desoldered, without killing the baseboard...

Cheers,
Thomas

[seb]

@jcaron Just added it