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Introducing P2P Telehealth
Earlier this year together with two partners we started a small company to work on P2P Telehealth – easy to use, compliant and secure telehealth platform. It’s like Zoom or Skype, but for health providers, clinics and their patients.
Anyone with no technical background should be able to join the consultation in seconds. No new apps needed. I think we succeeded.
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Quadropod - Mission completed
After several iterations with code and experiments with body positions, here’s the final version of the Quadropod for your judgement. Controlled over Bluetooth with a general purpose controller Android app.
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Quadropod - The library
Today I focused on several things:
- Converted functional code into classes
- Extracted general purpose pieces like the driver and the module to prepare move sequence buffers into a library
- Built the rest of the custom code on top of it
- Made the bot go back a step
- Made an improvement to how the step is made which increased precision
- Updated calculations to take the base piece length into account. Next comes turning, and this will become handy.
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Quadropod - Rework complete
Rework of the code is complete. Now it’s completely based on the timer interrupt. I must admit, it’s a huge difference in the way motion feels and is programmed. The level of control over what happens and when is tremendous. Exciting!
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Quadropod - Switching to interrups and timers
After a bit of experimentation I finally figured that working with servos from the main program loop is not very efficient and precise. The main issue I’ve been facing is synchronous and controlled rotation of several servos to different angles.
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Quadropod - Walking
Short recording of the first baby steps. Woo hoo!
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Immutability and Phoenix LiveView
In my daily work I’m going back and forth between Rails and Phoenix with the healthy dose of LiveView. This change in paradigm sometimes shoots me in the leg. This post is written in the form of a self-reminder.
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Quadropod - First moves
Parts printing and assembly has finished. After initial calibration, I’m now writing simple scripts to see the limits of the platform. We started with push ups:
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Quadropod - New version
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Writing mnesia data migrations in Elixir
Migrating data in Mnesia is traditionally a dark matter. Even if you understand the concept of translating tables, it’s still not clear how to organize your migrations so that they are picked up and run during the application start.