Deepsleep go_to_sleep function does not work with UART(1)

[affoltep]

Please include the following information when submitting a bug report:

• The Pycom board you are using (e.g. WiPy 2.0, LoPy). Lopy

• The firmware version you are using. You can get it by executing the following Python code at the REPL:

  (sysname='LoPy', nodename='LoPy', release='1.9.2.b2', version='v1.8.6-796-g489fafa0 on 2017-10-15', machine='LoPy with ESP32', lorawan='1.0.0' )

The following code prevents the LoPy for changing in deepsleep, issued by the initialization of the UART on port 1:

from machine import UART
from deepsleep import DeepSleep

ds = DeepSleep()

uart = UART(1, 9600)                         # init with given baudrate
uart.init(9600, bits=8, parity=None, stop=1) # init with given parameters
#uart.deinit()
#
ds.go_to_sleep(60)  # go to sleep for 60 seconds

If you uncomment the the uart.deinit() the LoPy crash.

Regards Peter

[jmarcelino]

That's because the DeepSleep class also uses UART 1 to communicate with the DeepSleep shield https://github.com/pycom/pycom-libraries/blob/master/deepsleep/deepsleep.py#L32

If you move the ds = DeepSleep() to be below your UART calls it should work.

[affoltep]

Many Thank jmarcelino. You are completely right. I should have study the source code before writing an issue ;)