P8 as input always high even if pulled low?

iotmaker

Ont he Wipy 2.0 I found out yesterday that if i declare pin 8 as input then pull it low.. it will stay high. is this a known problem?

livius

@iotmaker
yes, current firmware

iotmaker

@livius are you running the up to date firmware on that test?

thanks for checking the issue...

livius

@iotmaker
I can confirm this issue
pin P8 is never pulled down

if we declare it to

p_in = Pin('P8', mode=Pin.IN, pull=Pin.PULL_DOWN)

it stay high
but work as input pin if i wire it to GND it go to low but after wire is removed it go back to high.
can you report this as issue at:
https://github.com/pycom/pycom-micropython-sigfox/issues

livius

@iotmaker
what about with current firmware?
`1.7.2.b1'
i can check it but only in the evening

iotmaker

sysname='WiPy', nodename='WiPy', release='1.6.13.b1', version='v1.8.6-607-g9c8a0e9e on 2017-05-01', machine='WiPy with ESP32')

p_in = Pin('P8', mode=Pin.IN, pull=Pin.PULL_UP)...this will measure 3.3v because is pull up

This is supposed to measure a 0 but it still measure 3.3V.

p_in = Pin('P8', mode=Pin.IN, pull=Pin.PULL_DOWN)

livius

@iotmaker
What frmware version do you have?

os.uname()

and do you mean

p_in = Pin('P8', mode=Pin.IN, pull=Pin.PULL_UP)
p_in() -- this is high if you wire it to GND?