AdaBox 011: PyPortal

Yesterday I received AdaBox 011: PyPortal.

adabox011-pyportal.jpg

Similar to AdaBox 010, there isn’t much here in terms of assembly or physical experimentation using different parts, but the PyPortal is a really cool new device from Adafruit. It’s built for IoT projects, with:

  • 3.2″ touchscreen to display info and interact with the device
  • ESP32 co-processor to handle Wi-Fi connections
  • Analog Devices ADT7410 temperature sensor
  • SAMD51 to handle all of the processing, compatible with CircuitPython, which makes it fun and easy to program
  • Laser cut acrylic enclosure/stand

They’ve also included a 1 year pass to adafruit.io. I’ll likely turn this into something that interfaces with my Home Assistant server¬†to control different devices around my house.

img_2470.jpg
Took 5-10 minutes to remove the protective paper from the acrylic pieces and assemble the stand

I haven’t done much in terms of electronics, woodworking, or making in general for the last couple of months. I think I burned out a bit when I caught up on so many projects over November, December, and January. I’ll get back to making soon!

Between?

When resetting your Meijer password you get this on the form.

meijer-password-reset.png

I assume they meant “between” instead of “at least” because those two words don’t make any sense with a range. After putting in my randomly generated password I got an error because I had used symbols that weren’t allowed, yet the instructions don’t say anything about symbols.

If you are developing a system and restricting password lengths to something so small with odd character restrictions, you’re doing it wrong. Allow 64 character passwords everywhere!

PHP: Display Country Flag Emoji From ISO 3166-1 alpha-2 Country Codes

A couple of weeks ago I wanted to display emoji country flags from 2 letter country codes. I couldn’t find PHP examples anywhere. Character encodings confuse me, but after looking at some JavaScript examples and other PHP encoding info I was able to get something working.

$country_code = 'US'; // Uppercase
echo mb_convert_encoding( '&#' . ( 127397 + ord( $country_code[0] ) ) . ';', 'UTF-8', 'HTML-ENTITIES');
echo mb_convert_encoding( '&#' . ( 127397 + ord( $country_code[1] ) ) . ';', 'UTF-8', 'HTML-ENTITIES');

For U this prints out ūüáļ and for S it prints out ūüáł. When those two characters are side by side they get displayed as ūüáļūüáł.

If you have an improvement or this helps you out, leave a comment.

Catching up on Electronics Projects

I’m behind on a bunch of electronics subscription boxes and projects, so I’m just going to list out a bunch of stuff. None of its worthy of its own post anyway.

One of the projects for HackerBox #0023 was to build a custom antenna out of PVC, copper wire, and glue. I did a pretty piss poor job of drilling my holes in a straight line (as you can see in the picture), but I connected it to a microcontroller and was able to scan for Wi-Fi networks in the area. Success?

img_0591.jpg

I need to make more time to work with the pan and tilt system built with HackerBox #0024.

The camera that came with the project can only do 640×480, which sucks. One of these days I’ll connect the system to a Raspberry Pi and use one of my unused Pi cameras instead. Would be neat to mount at the front door to track anyone who comes to the house when I’m not home. The face tracking stuff is pretty awesome, even with the shitty camera. Here’s a really rough video of it.

I had to modify the code a lot to get everything working and I put it all on GitHub. If I work on this project more I’ll update that repo.

There wasn’t a lot to do with HackerBox #0025. It was mostly a soldering and look at the blinky lights project. Here are the 3 badges I made. I turned the star and rectangle (with a “Let’s Party” sticker in place) into pins and gave them to my nieces.

The skull badge has a buzzer on it, so I wrote some code (it’s on GitHub) to make it play the Star Wars theme and display some light animations.

Over the holidays I messed with AdaBox006¬†a bit. The 38 I posted on my birthday was a light painting taken with the Slow Shutter iOS app. I got it the light paintbrush working on both the Circuit Playground classic via a customized Arduino sketch and on the Circuit Playground Express through MakeCode. Both are available in the adabox-006 repo on GitHub. Using MakeCode is a fun way to program and I think it’s going to change the way people learn. Look at how simple and visual that version of the program is…

adabox-006-make-code-light-paintbrush.png

I did solder everything for HackerBox #0026¬†and verified some of the functionality, but haven’t done much with it. It was one of the most fun projects so far from HackerBoxes because of how many components were on this PCB. I find soldering to be so relaxing and satisfying.

I added the code for the temperature sensor I mentioned and showed in my post Why Are Thermostats Still on the Wall? to a new dht11-low-pass-filter repo on GitHub. Very simple, but useful.

Counting Types of Days in PHP

Since I work on our HR team at Automattic, sometimes I need to write code dealing with payroll. When someone starts or leaves we have to pay them for a partial period, which is based on the number of week days. Originally I wrote a simple function, but I set out to make it more useable. Here is what I came up with…

/**
 * Counts the days (optionally limited by type of day) between (inclusive) two dates.
 *
 * @param string $start_date First day (Y-m-d format).
 * @param string $end_date   Last day (Y-m-d format).
 * @param array  $types      Optional. Types of days to count. Default to all types
 *
 * @return int Number of days matching the $types.
 */
function get_days_between_dates( $start_date, $end_date, $types = array() ) {
	$count = 0;

	$included_day_type_indexes = array();
	if ( empty( $types ) ) {
		$included_day_type_indexes = range( 1, 7 );
	} else {
		foreach ( $types as $type ) {
			switch ( strtolower( $type ) ) {
				case 'weekday':
					$included_day_type_indexes = array_merge( $included_day_type_indexes, range( 1, 5 ) );
					break;
				case 'weekend':
					$included_day_type_indexes = array_merge( $included_day_type_indexes, range( 6, 7 ) );
					break;
				case 'monday':
				case 'mon':
					$included_day_type_indexes[] = 1;
					break;
				case 'tuesday':
				case 'tues':
				case 'tue':
				case 'tu':
					$included_day_type_indexes[] = 2;
					break;
				case 'wednesday':
				case 'wed':
					$included_day_type_indexes[] = 3;
					break;
				case 'thursday':
				case 'thurs':
				case 'thur':
				case 'thu':
				case 'th':
					$included_day_type_indexes[] = 4;
					break;
				case 'friday':
				case 'fri':
					$included_day_type_indexes[] = 5;
					break;
				case 'saturday':
				case 'caturday':
				case 'sat':
					$included_day_type_indexes[] = 6;
					break;
				case 'sunday':
				case 'sun':
					$included_day_type_indexes[] = 7;
					break;
			}
		}

		$included_day_type_indexes = array_unique( $included_day_type_indexes );
	}

	$date = strtotime( $start_date );
	$end = strtotime( $end_date );
	while ( $date <= $end ) {
		if ( in_array( date( 'N', $date ), $included_day_type_indexes ) ) {
			$count++;
		}

		$date = strtotime( '+1 day', $date );
	}

	return $count;
}

/*** EXAMPLES ***/

echo get_days_between_dates( '2017-08-21', '2017-09-03' ) . "\n";
echo get_days_between_dates( '2017-08-21', '2017-09-03', array( 'weekday', 'weekend' ) ) . "\n";
echo get_days_between_dates( '2017-08-21', '2017-09-03', array( 'mon' ) ) . "\n";
echo get_days_between_dates( '2017-08-21', '2017-09-03', array( 'weekday' ) ) . "\n";
echo get_days_between_dates( '2017-08-21', '2017-09-03', array( 'mon', 'wednesday', 'fri' ) ) . "\n";

This is the output of the examples…

14
14
2
10
6

What do you think? What would you do different?

I put the function up on GitHub. Submit a pull request if you have improvements.

Updates to Home Assistant Projects

My garage temp sensor, running¬†home-assistant-temperature-monitor¬†stopped working several months ago. I didn’t have time to figure it out and then summer hit, when it’s not important since I don’t heat up the garage before I workout. This weekend I finally got around to troubleshooting the problem.

Turned out I needed to install¬†Adafruit_Python_GPIO. I must have updated my code at some point without fully testing, otherwise I’m not sure how any of it worked before. I didn’t investigate that though; I was more concerned with fixing it and doing some improvements. I updated the OS and everything on the Raspberry Pi since it hadn’t been turned on in quite some time.

Earlier this year, another Pi on my network, the one running Home Assistant and Pi-hole, ran out of disk space without warning. I’ve wanted to put in a notification system so it never happens again, so I updated¬†home-assistant-pi¬†to report the disk use % to HA. I added an automation to notify me whenever it’s above 90% for one of my Pis. I also reworked all of the automations in home-assistant-pi to make it easier to configure each time I get a new Pi.

img_9705

That all took much longer than I expected. Most of the trouble was trying to understand the Jinja template system¬†used in HA and where it can be applied to configurations. I think I’m finally getting the hang of it.

While writing this post, I found an old draft with some other updates to home-assistant-pi I never published. Maybe I never finished and that’s why everything stopped working! Here’s a list of some previous updates:

  • Fixed errors causing program to crash.
  • It wasn’t reconnecting very well, especially if Home Assistant went away (ex. for a restart after an upgrade).¬†Rewrote how the MQTT connection works.
  • Switch from PushBullet to iOS notifications.
  • Changed show/hide Home Assistant group automations.

Now that this stuff is running again and I have a better understanding of the Home Assistant automation capabilities, I need to continue the series of posts I planned on home automation. It’s been five and a half months since I published¬†Part 1!

Code with Microsoft for Beginners and Makers

It’s been quite some time since I’ve used any Microsoft products. They are really stepping up their game when it comes to makers and creating tools to teach people how to code.

Makecode¬†(by Microsoft) is a site similar to Scratch. Both are great way for kids (or adults) to get started with programming. The powerful part is the drag and drop interface which simplifies coding. Instead of having to remember the syntax of a for statement, in the block editor you drag over a for block and fill in a couple of fields with the values for the variables. You don’t even need to buy a board to get started because the site has an emulator built right in.

makecode-circuit-playground-light-rotate.gif

Makecode has support for a bunch of microcontrollers aimed at beginners. Currently it works with micro:bit, Circuit Playground Express, Minecraft, Sparkfun Inventors Kit, and Chibi Chip. I selected the Circuit Playground Express for my example above.

They’ve also built a¬†Visual Studio Code extension for Arduino, which is now open sourced.¬†I downloaded VSC and installed the extension. I didn’t play with it very long, but it looks like it’ll be my new editor for Adruino projects. It does things that every programming IDE should do, like code completion, which the Arduino IDE still does not do. I also installed some Python extensions, so I’ll have to see how it compares to the Atom editor, which is what I’ve been using for Python programming.

visual-studio-code

CrossFit Programing: Are We Doing Too Much?

Following up on my post about Online CrossFit Programming, I wanted to write some thoughts about how affiliates program classes for the general population, like you or I.

CrossFit is meant to be a conditioning-biased exercise program. Look to this pyramind illustrating a theoretical hierarchy for the development of an athlete. It comes from Greg Glassman’s “What is Fitness”, which was published 15 years ago in the CrossFit Journal.

crossfit-heirarchy-of-development

Nutrition is the most important and then it’s conditioning. Somewhere about 5 years ago CrossFit affiliates started to shift the importance and focus of their programming to be strength-biased. This probably had something to do with the rise in popularity of the CrossFit Games; people wanted to train like the elite Games athletes.

Since day 1 and still today, the WOD posted on CrossFit.com is only one workout. They don’t suggest performing a strength piece, a skill piece, and a conditioning piece every day like you see in almost every CrossFit affiliate around the world. If you attend a Level 1 seminar, during the programming lecture they don’t teach you how to jam pack an hour with as much exercising as you can. Sure some of the Main Site WODs are strength focused, as they should be, but the majority of days the workout is a conditioning based one. Are we causing ourselves to get injured more and limiting our potential as human beings by doing too much?

Here’s a great podcast episode with Ben Bergeron, who is one of the top coaches in the sport. He explains a lot on the topic and makes a lot of great points for conditioning-biased programming.

What do you think?

Once I finish up this Push Only program I’m following (about 4 more weeks), I might experiment with some conditioning-biased programming like CrossFit teaches us.

Buy a Circuit Playground, Give One to Girls Who Code

Adafruit and Digi-Key have teamed up to support a great cause, Girls Who Code.

We’re a national non-profit organization dedicated to closing the gender gap in technology.

female-students-computing.png

For any purchase of a¬†Circuit Playground Classic¬†from Digi-Key, they’ll donate one to¬†Girls Who Code.

At only $20 the Circuit Playground Classic is a really neat board, packed with goodies.

  • ATmega32u4 Processor, running at 3.3V and 8MHz
  • MicroUSB port for programming and debugging with Arduino IDE
  • USB port can act like serial port, keyboard, mouse, joystick or MIDI
  • 10 x mini NeoPixels, each one can display any color
  • 1 x Motion sensor (LIS3DH triple-axis accelerometer with tap detection, free-fall detection)
  • 1 x Temperature sensor (thermistor)
  • 1 x Light sensor (phototransistor)
  • 1 x Sound sensor (MEMS microphone)
  • 1 x Mini speaker (magnetic buzzer)
  • 2 x Push buttons, left and right
  • 1 x Slide switch
  • 8 x alligator-clip friendly input/output pins
    Includes I2C, UART, and 4 pins that can do analog inputs/PWM output
  • All 8 pads can act as capacitive touch inputs
  • Green “ON” LED so you know its powered
  • Red “#13” LED for basic blinking
  • Reset button

With so many features, Circuit Playground¬†is a perfect board for someone learning to program. There are endless possibilities for fun projects.¬†I ordered one to support the program. I’m hoping they’ll get some of the new¬†Circuit Playground Express¬†boards in stock and extend this promotion to those because I’ve been tempted to get my hands on one. If they do, I’ll gladly place another order.

CrossFit Programming Services

I’ve used a couple of online CrossFit programs this year that I’ve really liked. The first is Hybrid Performance Method. For about $35/month you can choose between¬†8 different programs and you can switch anytime you want with a few clicks in your profile. For a few months at the beginning of the year, a couple of friends and I were following the Hybrid WOD program to prepare for the CrossFit Open. It was hands down the hardest, but also the best programming I’ve followed. We averaged¬†about 90 minutes in the gym, 5 days a week and saw big improvements in our fitness.

After I tweaked my back, I switched over to Hybrid Push-Only, which is all about the upper body and runs 4 days a week. It rarely takes me over an hour to finish the assigned work. I’m really loving it. Bench press is the main lift, but there is also a fair amount of overhead pressing, a ton of accessory work, and a day focused on pulling strength, mainly pull-up type movements. We’ll see if I can’t hit a 300 pound bench press at the end of 12 week program. I’ve been spacing out the 4 days a week so I can still go to a 2-3 CrossFit classes. I think I’m averaging about 9 days to get through a week of the program and am finishing up week 8.

The other program I’ve used this year is Performance Plus Programming. It’s focused around gymnastics type stuff and using movements to create stability and support. It runs $20/month, has 4 workouts per week, and almost never takes me more than 10 minutes to complete. The first month was focused on shoulders, which paired up really well with the Push-Only program. I need to loop back around and repeat that month of programming before I try out the core focused month.