Alex's Corner - Week 6 - Best Practices for Deployment

[livius]

@PiAir
this is about voltage/state indicator
IRQ_LOW_LEVEL 0
IRQ_HIGH_LEVEL 1 - 3V3
IRQ_FALLING - The falling edge of the signal
IRQ_RISING - The rising edge of the signal

[PiAir]

@livius Ok...but when would I prefer using IRQ_HIGH_LEVEL over IRQ_RISING in an interrupt? Is it just there for redundancy or are there specific use case that would make you use one or the other?

[livius]

@PiAir
You can add or between and fire in both cases :-)
e.g.

Pin.IRQ_FALLING | Pin.IRQ_RISING

are there specific use case
This depend - e.g. how fast signal raisin/falling

[tenspot]

Hi Alex,
Thank you for posting these tutorial videos, I find them very useful.
You refer to using a configuration file for wifi password, UUID etc., I would be grateful if you would outline the structure of this file as I would like to use this technique, but am unsure how to create such a file.

Regards,

Mervyn

[PiAir]

@tenspot have a look at this config.py and this file that uses it.

Basically the config.py is a .py file where you declare the variables:

GATEWAY_ID = '11aa334455bb7788'

SERVER = 'router.eu.thethings.network'
PORT = 1700

NTP = "pool.ntp.org"
NTP_PERIOD_S = 3600`

WIFI_SSID = 'my-wifi'
WIFI_PASS = 'my-wifi-password'

Then, if you want to use them in another python file, you import it using:

import config

After that you can address any variable that you have defined in that config.py file like (for example):

config.WIFI_SSID

etc

[RobTuDelft]

@tenspot It's also a convention to write the constant 'variables' in all uppercase.

[tenspot]

@PiAir Hi, Thanks for your reply, I didn't realise it was that simple! Thanks to Rob also for your comment on capitalisation of constants. Knowledge of these things all helps to improve my code readability and style.

[bucknall]

Hi @tenspot, apologies for the delay getting back to you, I have been busy with events this week! Thanks @RobTuDelft and @PiAir for answering these questions!

[tenspot]

@bucknall No problem. Thanks again for the video tutorials.

[PiAir]

@tenspot You're welcome. And if you like video tutorials, I can also recommend the ones by Tony DiCola from Adafruit. Although they are not LoPy/Pycom specific (he often uses the Adafruit boards) they are very informative. That is how I learned microPython:

https://www.youtube.com/playlist?list=PLjF7R1fz_OOXrI15wuXeESA0aA4VzcWSi

[tenspot]

@PiAir Thanks for the link, I will check it out.