Bread Alarm iOS App
- Sketch (for drawing the bread illustration)
Idea for this app
When I bake sourdough bread, I start with a higher temperature and then turn down the oven to a lower temperature. In the past I sometimes forgot to set a new timer after setting the first timer. So I built an app that offers two timers that finish after each other.
There are two picker elements to select the amount of time for both temperatures, a label showing the total time and the time when everything will be finished. As time flys by, the pickers also change their value. The app saves it’s state constantly, therefore users can even close the app completely and they will see the states of any unfinished timers. Whenever a timer finishes, the user will get a local notification with a custom sound.
Unfortunately Apple does not allow to override device muting with custom sounds. Therefore, users have to unmute their device. Although you can request this capability for your app, as far as I understood it is only allowed for critical applications (e.g. healthcare). In addition to that, you can request it only as a team and not as a single developer.
I also wanted to learn how to implement in app purchases (IAP) and added one to tip me with 1,09€ (or 0,99USD). For the first time a user buys this, the hat on the home screen gets a nice baker’s hat as an upgrade.
Flippy Vocabulary iOS App
- Storyboards with Auto Layout
- Sketch (for designing the first prototype)
- Testflight for Beta testing
About the app
The core feature of the iOS FlippyApp is a very simple adaptive learning algorithm that draws words based on the learning progess. Users can create as much languages they like, everything is saved on their device.
Users can share languages as csv files for backing them up or editing them on another device. I used Swift’s
UIActivityController for that so users can share language files via any supporting service or App, e.g. Mail, WhatsApp, Telegram or Airdrop.
FlippyApp is my first app that I sucessfully released to the iOS AppStore. I learnt a lot about the App Store review process while publishing this first app. You can read more about it here: https://mic.st/blog/my-first-intransparent-app-store-review-adventure/
Raspberry Pi x Greenhouse
Idea for the project
I am a hobby gardener for quite some time and I always enjoyed to raise up plants from seeds. In the past I relied upon raising them in small plastic bags. This is not always the best option because of the low light conditions that are indoors.
Luckily, I got quite a big greenhouse for my birthday that I equipped floor after floor (it has three 🙃) with LED lights connected to a 230V time switch. I felt the whole thing heating up pretty tropical but I had now idea how much it was actually heating up. So, I decided to put some electronics in there.
- RaspberryPi Zero W connected to our WiFi
- 3x AM2302 (temperature & humidity sensor)
- some meters of three core cable
- Minimal setup for the Raspberry (Raspbian Lite)
- Python script for reading the sensors with the library
Adafruit_DHTand sending them via
requeststo my backend
- Cron task executes this python script every 15 minutes
- My backend is running a MySQL Server where the six values are saved into a table together with a timestamp
- A PHP-script selects the last 600 entries, i.e. 200 per sensor and renders it to HTML via charts.js
- Electronics, Raspberry Pi
See it in action: http://mic.st/tempLog/getTemperatures.php