Inline variables is one of the cool new feature coming in 10.3. The obvious huge use case is loop control variables, but I just discovered another great use case while reviewing some code.
var1, var2: Integer;
// use var1
// use var1 &amp;amp;amp;amp; var2
This is a pattern I see a lot, and it generates a hint on var2 being unused based on the current compiler directive status.
[dcc32 Hint] myUnit.pas(123): H2164 Variable 'var2' is declared but never used in 'DoesSomething'
Now there are a number of ways to deal with this with more compiler directives, which is what I’ve done in the past, but I never like adding more compiler directives. It makes the code way more complicated and harder to maintain. Now with Inline Variables I can simplify it, make it easier to maintain, and hande the hint! (all of which makes me so happy!)
// use var1
var var2: Integer;
// use var1 and var2
What are some interesting ways you see inline variables benefiting you?
Cosplay (aka costume-play) takes the fun and imagination of childhood dress-up to extreme levels only justifiable by an adult! Not only is it expensive, and needs a large time commitment, but it is rarely comfortable.
Comic conventions are the usual place to find cosplay, but Halloween is also a good excuse for some cosplay fun. I’m a huge fan of creative cosplay and love getting my picture with cosplayers.
I’m a big fan of both the book and the original RPG and am looking forward to the video game. I combined elements from all three sources for my cosplay. The character V is more of a Street Samurai / Solo, while I wanted to go for more of a Decker / Netrunner (a little Shadowrun RPG influence in there too).
I didn’t have my RGB Shades in time for Salt Lake FanX, so I justed glued some extra LEDs (NeoPixel 4×4 grids) to my face. They represent cybernetic enhancements, which is why I left the wires exposed. I used an Arduino MEGA 2560 by ELEGOO as the controller. It also controlled the string of NeoPixel lights in the collar. I attached a Bluetooth keyboard to one wrist and an Android Pixel phone to the other. The phone was decorative for now.
Later I got my RGB LED Shades which will become the key to my outfit for this Halloween. The RGB LED Shades use an Arduino Mini as the brains. I added an HC-06 Serial Bluetooth module to control the leds remotely.
After soldering the HC-06 onto my shades I can power them up and pair my Android phone with the HC-06 module. One note about my soldering is that if you look you will see that it is connected to two analog pins instead of digital pins. On most Arduinos the analog pins can double as digital pins (see the Pinout).
After that, a TBluetooth component is able to open a socket to the shades. Start the pairing with Bluetooth1.DiscoverDevices( 5000 ); In the DiscoveryEnd event handler the following code will open a socket to the HC-06 module (Thanks to Boian Mitov for the basis of this code):
ADevice : TBluetoothDevice;
AService : TBluetoothService;
for ADevice in ADeviceList do
// HC-06 is the name of the bluetooth device
if ADevice.DeviceName = 'HC-06' then
Bluetooth1.Pair( ADevice );
for AService in ADevice.LastServiceList do
// FSocket is a TBluetoothSocket with larger scope
FSocket := ADevice.CreateClientSocket(
AService.UUID, False );
If Assigned( FSocket ) then
Once the socket is open you can send characters with this code.
I took my RGB Shades with me to Sao Paulo Brazil for the 10.3 Rio preview. Even though the Bluetooth worked before the conference, my phone couldn’t make the connection on stage. When I opened my phone’s Bluetooth connection window it was obvious that with 750+ people in attendance there were a few hundred Bluetooth devices broadcasting on the same wavelength.
My next project involves Bluetooth LE with these RGB LED Steampunk Goggles.
I built them a year ago from an AdaFruit kit. Later I added a Bluetooth LE Module to make them controllable. Unfortunately, my soldering didn’t hold up and I need to rebuild them. This makes them both my previous and next cosplay project.
I’m considering salvaging the NeoPixels and rebuilding them with an ESP32 microcontroller. The ESP32 is a little larger than the original Trinket microcontroller. This is because it has integrated Bluetooth LE, WiFi, and more pins. I’d also like to get some 50% mirrors to create an infinite LED tunnel effect (I’ll post pictures when I get them – it is really amazing).
I’ve worked with the TBluetoothLE component before and it is even easier to work with than TBluetooth. So I’m really looking forward to this project.
On the Arduino side, you can use the Arduino IDE and flex your C programming skills. Or you can do like I usually do and use Visuino by Boian Mitov of Mitov Software. It provides a visual drag and drop interface for programming Arduino devices. It won the Embarcadero Cool App contest in April 2017 as Boian used Delphi to develop Visuino. Boian also recently added RGB LED Shades support to Visuino (along with unboxing and assembly videos.)
I think Boian is a great guy who makes some great technology. Most of it has a free version and the commercial prices are very reasonable too. He is always very helpful as well.
So what’s next (after the Bluetooth LE RGB Steampunk Goggles obviously)? I’m working on a design for an electronic physical polyhedral die with Bluetooth LE. So you roll a physical die of a single size and it can become any number of sides you need, all controlled via your phone. Did I mention how much of a nerd I am?
We just shared a preview of 10.3 Rio in Brazil on Tuesday, the 23 of October here at the Embarcadero Conference in São Paulo. Over 750 developers were in attendance, and the speakers included many Embarcadero and Sencha MVPs. I snapped a few pictures from the event that I thought I would share.
With a name like 10.3 Rio is great we were able to do a preview event in Brazil as part of their annual developer conference. I’ve been in attendance every year since I started at Embarcadero, and it is something I always look forward to. Most years the attendance is around 400 to 500. I’m sure the news about 10.3 Rio and the recent Community Edition helped contribute to the high attendance numbers this year. Either way it is great to see the Delphi developer community continue to grow.
I hope to get some more of the pictures I was in with the MVPs and other speakers, as well as some other general conference pictures. I’ll share those later when I get them.
Stay tuned for more news about 10.3 Rio and other pictures from the event!