pawl

follow ubuntu framework laptop guide

https://community.frame.work/t/ubuntu-21-04-on-the-framework-laptop/2722

change settings in ubuntu

• adjust touchpad (no natural scroll)

set up firefox

• ublock origin: https://addons.mozilla.org/en-US/firefox/addon/ublock-origin/
• lastpass: https://addons.mozilla.org/en-US/firefox/addon/lastpass-password-manager/

pawl

ERROR: Exception:
Traceback (most recent call last):
  File "/Users/blah/.pyenv/versions/2.7.18/envs/blah.com/lib/python2.7/site-packages/pip/_internal/cli/base_command.py", line 224, in _main
    status = self.run(options, args)
  File "/Users/blah/.pyenv/versions/2.7.18/envs/blah.com/lib/python2.7/site-packages/pip/_internal/cli/req_command.py", line 180, in wrapper
    return func(self, options, args)
  File "/Users/blah/.pyenv/versions/2.7.18/envs/blah.com/lib/python2.7/site-packages/pip/_internal/commands/install.py", line 403, in run
    pycompile=options.compile,
  File "/Users/blah/.pyenv/versions/2.7.18/envs/blah.com/lib/python2.7/site-packages/pip/_internal/req/__init__.py", line 90, in install_given_reqs
    pycompile=pycompile,

pawl

// based on the lcdthermocouple example
// also:
// https://randomnerdtutorials.com/esp32-ssd1306-oled-display-arduino-ide/
// http://www.esp32learning.com/code/esp32-and-max6675-example.php
// parts:
// * HiLetgo DC 3-5V MAX6675 Module + K Type Thermocouple Temperature Sensor 
// * UCTRONICS 0.96 Inch OLED Module 12864 128x64 Yellow Blue SSD1306 Driver I2C
// * ESP32

#include <max6675.h>

pawl

# samsung evo+ sd card
pi@raspberrypi:~ $ dd if=/dev/zero of=/home/pi/test bs=8k count=50k conv=fsync; rm -f /home/pi/test
51200+0 records in
51200+0 records out
419430400 bytes (419 MB, 400 MiB) copied, 17.0585 s, 24.6 MB/s

pawl

/*
 * This sketch programs Ardunio to communicate with Artisan using MODBUS protocol and
 * an inexpensive thermocouple amplifier.
 *
 * Hardware:
 *  Arduino UNO
 *  Thermocouple amplifier (MAX6675)
 *  K-type thermocouple
 *
 * Libraries needed:

pawl

/*
 * This sketch programs Ardunio to communicate with Artisan using MODBUS protocol and 
 * an inexpensive thermocouple amplifier.
 * 
 * Hardware: 
 *  Arduino UNO
 *  Thermocouple amplifier (MAX6675 or MAX31855)
 *  K-type thermocouple
 *  
 * Libraries needed:

pawl

$ go run dnstrace.go -c 10 -s 192.168.1.94 -n 100 www.googletagservices.com
Benchmarking 192.168.1.94:53 via udp with 10 conncurrent requests


Total requests:	 1000 of 1000 (100.0%)
DNS success codes:	1000

DNS response codes
	NOERROR:	1000

pawl

1. download nircmd: https://www.nirsoft.net/utils/nircmd.html
2. unzip to C:\
3. go to sound devices and rename to simpler names without spaces (headphones/speakers)
4. Open logitech gaming software and change 2 buttons to "shortcut" with these commands:

• "C:/nircmd/nircmd/exe setdefaultsounddevice Speakers"
• "C:/nircmd/nircmd/exe setdefaultsounddevice Headphones"

pawl

1. download ubuntu image for orangepi zero LTS: http://www.orangepi.org/downloadresources/
2. flash with etcher
3. fiddle with USB to TTL, gave up on trying to get that to work
4. plug ethernet into switch
5. ssh orangepi@
6. password orangepi
7. couldn't successfully apt-get update upgrade, getting E: Unable to acquire the dpkg frontend lock
8. download armbian image for orangepi zero LTS: http://www.orangepi.org/downloadresources/
9. flash with etcher
10. armbian-config

pawl

# See full example: https://github.com/pawl/django_modelchoicefield_caching/blob/master/myapp/views.py#L31-L51
    for song in playlist:
        form_data = {'title': song["title"], 'artist': song["artist"]}
        song_form = forms.SongFormWithModelChoiceField(data=form_data)
        song_form.is_valid()  # runs a query to get the ModelChoiceField queryset each time

    print('ModelChoiceField - query count AFTER validating all songs:',
          len(connection.queries))  # 5 queries

    # query for choices outside of the loop to prevent unnecessary queries