Harry Goodwin Dev

I needed to know the rotation direction of the device when it switched between orientations, so I could rotate a 2d array. I wanted it to feel modern and easy to use with SwiftUI, here is my attempt...

A long time ago I wrote a post about discovering BLE peripherals and displaying them in list form. That was way before SwiftUI though so I thought I'd revisit the idea, remaking the feature in the quickest and low complexity way possible to get started quickly...

In my new app BLE Discover, I set out to build a settings page with a fairly basic list of items, which when tapped present a new view modally. Seems easy enough right? Just add a tap gesture to each view in the list...

For one of my personal apps, I wanted to do something fun and add alternate app icons. Well, it was really to try and decide which icon I liked best but anyways… turns out it's relatively easy to implement...

Bullet points in iOS apps always seem to cause more of an issue than I'd think possible, often not indenting correctly at the right places. Using NSParagraphStyle and NSAttributedString we can get what we'd expect, with little effort...

This post will show the minimum effort needed to get a list of BLE (Bluetooth 4.0) devices that are advertising on your iOS device...

I needed to animate a blur over an image recently so I thought I would share how simple the effect can be achieved. You will need to be building with iOS 8 or above...

I noticed when using an app the other day that its UITableViewCells were increasing in size when touched, with the height increase also animated. I thought this would be quite difficult to achieve but after digging around it turns out that its quite simple...

Using arrays is a staple of iOS development and there many tools at our disposal to do all manor of things with them. Below are some that I use often and find quite useful...

When making views in Xcode Storyboards it can be frustrating not being able to see any work you have done using code or not being able to change run time attributes like corner radiuses. Fortunately, Xcode has some added some features to storyboards that permit real time run time attribute editing...

Finishing the project up by building the iOS app to read the temperature data from the already built web server...

Making a cron job to schedule temperature readings and storing them using php...

I needed to make cells appear from the centre of a collection view for a work project recently. Heres how I did it...

If you have used any of my earlier blog posts for sending data to a bluetooth module from an Android device you may have noticed you can only send ASCII characters. This is fine for most activities but what if you need to send carriage return or line feed, which are 0xD and 0xA respectively...

Setting up the MySQL database to store the temperature data...

Using a Raspberry Pi to monitor and store temperature data into a web server, which can be accessed with an app...

With a limitation of 20 bytes per transaction, how can we send even just large strings to the RFduino...

Documenting my journey of using the RFDuino...

Using some low cost BLE UART modules to do some simple communicating between a phone and device...

In part 2 I will explore making the Android app to send and receive data to an Arduino over Bluetooth...

In some previous posts I went through the basic steps to send data from an Android device to an Arduino using a bluetooth serial module. That was fun and all but it would be better if the Arduino could send data back to the Android device...

Finishing up the Android app and testing what we have built...

Making part of the Android app to connect with the Bluetooth module...

The intention is to connect an LCD display and Bluetooth module to an Arduino so that it can receive and display information using the LCD and inbuilt LED. I will then show you how to make a simple app to control these features...