![]() I strongly suggest using someone else's component rather than trying to build one yourself. I have been successful using TCommPort by Dirk Claessens (freeware with full source code). TCommPort On the Internet, there are several TCommPort type components (see the references below or just search for them). Here is a reference that helped me develop this section. Instead, click on it in your code and press F1. This is because ReadFile is a Windows API command … not a Delphi command. Instead, it uses the following Kernel32 commands (found using Depends.exe) If you try to search the Delphi 5 help for ReadFile, there are no hits. When CreateFile, ReadFile, and WriteFile are used, Delphi does not use MSComm. This next routine works from the IDE, but not if you run the app by double clicking the exe file. Uh, both routines work when run from the IDE … the second refuses to work if you double click on the exe file. For test purposes, each was connected to its own button. Once the port is open and configured, here are 2 routines that will read the port. Eventually, I will use ReadFileEx because it will call a routine when a barcode is scanned. Having done that, ReadFile waits until I scan a barcode. I don't know what good values should be, so I used 300. Instead, use code similar to the following Reading a Port Well, reading the port is almost trivial … if you know the trick. Warning: There is an error in the FAQ - NumberWritten must be dwordDelphi 7 Serial Port Component not LongInt This code works for comports 1 thru 9, but not for ports 10 and higher. ![]() The code in the FAQ also verifies a valid handle before writing to it. Writing a Port The following code from FAQ 16400 shows how to write to the comm port as a file. Most of these comm commands (such as CommConfigDialog) are defined in kernel32. 16400: How can I dial out through the modem under Win32? How to write to the comm port 16774: How can I determine the names of the installed comm ports? The data is read from the registry In addition to the Delphi File I/O commands, there are several Windows API commands. 16193: Setting comm port configuration programmatically under Win95 16199: Changing com port config via Win95 CommConfig Dialog (Pure gold :) … except that only the baud rate can be changed :( the other 4 fields are ignored. Basic Commands I really don't get it, with all the available windows API commands, why doesn't Delphi provide a built-in wrapper function for SerialIO? Borland provides the following Delphi FAQ's (delphi-faq.zip 915K). Generic References | Basic Commands | Writing a Port | Reading a Port | TCommPort | Additional References Generic References I provide numerous references in Serial I/O (RS232). Therefore, this page exists to help get around windows. However, Windows 95 and above forbid direct hardware access. Under DOS, it was possible to directly access these ports. Normally, these ports are used for mice, modems, printers, and the like. These comm ports provide voltages and pin outs consistent with RS-232C. ![]() Download zipped Delphi source code.From Arduino, enter following code and save it as 'delphi_leds.pde': Serial I/O (RS232) Using Delphi (RS232) All Intel PCs have one or two serial ports usually referred to as Com1 and Com2. Library used for serial communication is open source library the ComPort. It uses freeware Synaser library to communicate directly to the serial port.Penguin Cult Lab made a simple Arduino controller from Delphi, here the screen-shot:This example uses 5 LEDs that will be controlled from the Delphi program via serial communication. Example comes with Arduino Sketch and Delphi/Lazarus Project. I've found this piece of code for Delphi and Lazarus (free pascal), It suppose to control the level of brightness of a LED through the pin 7 of Arduino Board. The price of Arduino Pro Mini in this store is incredibly cheap, less than US$7. You can try the sertest example of the component to see how this works.For people live in Indonesia where buying Arduino from overseas is expensive and requires months of delivery time, you can buy Arduino compatible boards from, toko komponen elektronika yang menjual Arduino dengan harga murah. In this form, you can choose your port from a combobox filled with the serial ports of your system (see attachment). With the Tlazserial component, you have a form for settings of the serial port. If you have a couple of USB serial converters connected to the PC, sometimes there is a problem with port initialisation. Although I do not usually have problems, there is one bugbear that I cant seem to solve. Hi - I'm using the free Tcomport component for Delphi. ![]() Arduino is a single-board microcontroller, intended to make electronic application of interactive objects or environments more accessible for everyone.Delphi 7 XP prof.
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![]() I haven’t tried the $120 Kobo Clara, but I’d imagine it’s more or less comparable to the Kindle Paperwhite. (You might notice the Kobo logo screened onto the front of the plastic I wish it wasn’t there, but the truth is that I never notice it when I’m reading.) There’s no doubt that the Kindle is nicer to hold-but it’s also $100 more. The big difference between them is that the Kobo has a plastic back, while the Kindle’s is aluminum. Like the high-end Kindle Oasis, the Kobo Libra H2O is a waterproof ereader with a sidelit seven-inch diagonal E Ink screen and a grippable edge with two physical page-turn buttons. Down to the hardware For $100 less you don’t get a nice aluminum back. ![]() However, I’m planning on keeping a Kindle around-and Calibre and its associated DeDRM plugin make it relatively easy for me to download old Kindle purchases and load them on a Kobo. Really, Amazon’s greatest advantage over Kobo is that I’ve got years of book purchases locked up in Amazon’s proprietary, DRM-encoded format. Amazon has improved a lot of its maddening typography features over the years-forced justification being perhaps its greatest sin-but Kobo’s still ahead.īoth services let you buy books from their online stores. Kindle fonts seem jagged compared to Kobo fonts. I can’t tell how much of the Kindle’s poor text handling is its operating system and how much is its selection of typefaces, but type just looks better on the Kobo. The other superior feature of the Kobo is typography. Using Libby got me using library ebooks once in a while, but using a Kobo has made it a regular habit. If you check out ebooks from the library, or might consider doing so, the Kobo’s simply better. There’s no Overdrive interface on the Kindle itself. You need to check out a book on the web or in Libby, then click to send the book to, then click on to send the book to your Kindle. While Kindles will work with Overdrive, it’s a circuitous process. You can see your Overdrive queue and return books, all from the device itself. If I’ve checked out a book elsewhere-say, via the excellent Libby app, the book will download automatically the next time the device syncs to the network. Unsurprisingly, Kobo connects well with Overdrive, allowing me to browse and check out books directly on the device. Many libraries will let you borrow ebooks using Overdrive, a service that’s a part of the same company that owns Kobo. ![]() But in a few areas, it’s clearly superior. The software on the Kobo is, as you might expect, quite similar to that on the Kindle. ![]() Still, how is it possible that the Kindle didn’t let you use the cover of the book you’re currently reading as the screen saver image until April 2021?! More library books are coming to my Kobo soon. I’ve been using Kindles since the beginning, and the pace of Kindle software innovation is quite slow, though it’s actually shown a bit of improvement over the last few years. And while the Libra H2O is made of less premium materials than my old favorite, the Kindle Oasis, it also costs $100 less. It was just idle checking, I swear, and that’s why it took a couple of weeks for me to buy a Kobo Libra H2O.Īfter reading a few books on the Kobo, I’m prepared to declare that I actually prefer the Kobo to the Kindle. And that was when-as you do-I popped over to Kobo’s website to see what their current crop of ereaders looked like. The Kobo, a 2016-vintage Aura One, offered a few features that the Kindle didn’t, and I liked the idea of putting a mostly-unloved device to work at something it was good at.Īt some point I noticed a big gouge in the screen, probably a legacy of a school trip my daughter took a few years ago. This past year I’ve been spending more time reading books on a Kobo ereader, rather than on my Kindle. The Kobo Libra H2O is $100 less than the similar Kindle Oasis. ![]() Instantly translate words, phrases, and web pages between English and over 100 other languages. Offer Android applications that you develop to the rapidly growing Android user base.Įxplore with the Google Public Data Explorer to create visualizations of public data, link to them, or embed them in their own webpages.īack up and download the data in your Google Account. Get the latest apps, games, music, movies, TV, and news for all your devices. Store and share photos with Google Photos. Google Pay is the fast, simple way to pay online or make contactless payments with your phone. Text anyone from anywhere across devices.Ĭomprehensive up-to-date news coverage, aggregated from sources all over the world. Messages is a simple messaging app that keeps you connected with the people who matter most. 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Share your life online with a blog-it's quick and easy. Note: Assignments is a core service for Google Workspace for Education Fundamentals and Google Workspace for Education Plus editions. Quickly and securely create, analyze, and grade coursework, while helping students learn more effectively. Ready-to-use video lessons teach digital skills that have immediate, real-life application. Create powerful mobile and web applications in a no-code development environment. The metadata of images can be changed when converting images from one format to the other. Solution 2: Adjust the Settings While Converting Images Once the images have been converted and downloaded via the given link, you can safely remove them from the server. The default settings are sufficient for virtually everyone.Ĥ. If you’re not sure which settings to apply, leave everything as it is, and only pick the Image format you want to convert to. Next, you will have to adjust the settings. Drag and drop all the images which you want to convert to the area titled Online Image Converter.ģ. This solution teaches how to convert an image to a different format with ease.Ģ. The PNG image format is used to show transparency of images, the JPEG image format is used for general purpose applications, the BMP format is still used when images are sent for editing, and finally, the WebP format is used in web pages to improve the page load time. Some popular image formats are PNG, JPEG, BMP, and WebP. Picking the right image format not only saves the storage space, but also time, and money in the long term. This is why it is important to pick the right image format for the job. There are many image formats out there, and each one is designed to fulfil the requirements of a different set of users. This article teaches a couple of tricks to drive the size of images down without eliminating their quality. ![]() Image optimization is still useful in certain circumstances, as it allows people to save money and energy in the long term. Even though the image size used to be a problem for certain device manufacturers, it’s no longer a concern for them as file storage is dirt cheap. They used to be somewhat expensive, but the high demand for file storage caused their prices to plunge. ![]() These images are usually stored in file storage like hard disk drives, SSD drives, and micro SD cards. These days virtually everyone uses some kind of device that allows them to capture the beauty of the real world, and make a digital copy out of it. |
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