The sixth DIY-metap in Mail.Ru Group (02/18/2018)

Hello! The voting results have been summed up, the authors are preparing presentations, and now is the time to leave an application for participation. To do this, click on the link and register. Mitap, traditionally, will be held in the Moscow office of the Mail.Ru Group, at m. Aeroport, Leningradsky Avenue, Building 39 Building 79.

The list of reports and brief descriptions read under the cut.

List of speakers:


Sergey Savkin

Smart House

• On the opensource-based smart home platforms.
• How Home-Assistant won the tech race.
• The main protocols for the exchange of information in the field of Internet of things.
• Can a smart home cost 3,000 rubles?
• LoRaWAN wireless technology.

Yury Lilekov

GSM communication for DIY is easy!

• Let's talk about the features of common GSM-modules.
• Consider ways to connect them to different controllers.
• Let's try to assemble the cheapest standalone GSM-IoT device with a minimum of soldering and test it a little.

Evgeny Savitsky

An open platform for assembling a smart apartment based on Bluetooth LE and open source software

I want to talk about the current state of the concept of "smart" home, in terms of solutions for "smart" apartment, as well as to offer a solution and technology that may interest the DIY-community. The purpose of this technology is to provide a simple and affordable way to start collecting your “smart” apartment and not to pay a lot of money for expensive box solutions.

Boris Rebrov

DIY carpentry workshop, expectations and reality

• What is the carpentry workshop (history of creation)?
• Types of work (+ types of connections).
• The necessary tools and equipment (what you should buy, what you can do yourself).
• Unevident difficulties.
• The first products.

Vladislav Zaitsev

Cellular networks: tell me who your neighbor is and I will tell you who you are

• Radio network topologies: “star”, “expanded star”, “point-to-point”, “mesh network”, “tree”.
• Pros and cons of mesh networks. Why is this even necessary? Why not install repeaters? Where are mesh networks superior to other topologies? What are their cons?
• Principles of networking, routing in storing mode and non-storing: store a table on each device or on the coordinator? Why do you need a routing table?
• What you need to know to understand the conversation about cellular networks: boring terminology and boring tales.
• "At whose expense the banquet" or about what hardware it all works. What are the power requirements of endpoints?
• The difference between 6LoWPAN, ZigBee and Z-Wave. Protocols, standards and algorithms: closed standards and certification against open specifications and the principle of "drank what you want."
• What can I take to play: a quick start on open technologies

Kirill Smirnov

Development of an unmanned vehicle from scratch for dummies. Part 2: stereo vision. Jetson TK1 + PlayStation EYE v2 Camera

• What is the system for controlling the model of an unmanned vehicle.
• What are the elements of the stereo vision subsystem.
• Review of cameras available on the market.
• Description of the computer Jetson TK1 and its features.
• The story of the experience of creating this system.

Peter Blokhin

Sports minicar. From idea to protopipa

• Introduction it will be about this kind of motorsport, like karting. A few introductory words about this.
• Definition of goals, objectives, the formation of T.Z.
• The complexity of the theoretical approach to development.
• Difficulties of practical implementation.
• Then we will discuss the components that make up a sports car; highlights and tricks of manufacture.
• Findings.

Pavel Budnikov

Robot Tractor, a prototype agricultural robot

• The concept: why do we need a prototype and why so big.
• Design and manufacture of chassis: wheels or tracks, 3D design and welding of aluminum.
• Component selection: Ublox Neo or JAVAD, Raspberry Pi and Arduino or Nvidia Jetson and CAN Bus, lidar or Intel Realsense, motors, drivers and batteries.
• ROS and robots, or everything is thought up to us (almost).
• Management and high-precision navigation: joystick from Xbox, PPP and RTK in RTKLib, lidar, odometer and Kalman filter, building a route and avoiding obstacles.
• Everyday work with iron: chase through the park behind a riotous robot, “again everything burned down”, “everything needs to be redone” and other stories.

Kirill Snezhko

One app to rule everyone: a universal app for cameras with wireless interfaces

• We understand the protocols and interfaces of some cameras (Ricoh Theta SC, Xiaomi Yi Action Camera, Xiaomi Yi Smart Dash Camera, Nikon D7500)
• Decompilation and modification of official applications.
• API cameras and almost everything connected with them.
• Procurement for your own camera aggregator application.

There will be 3 blocks of reports on 3 reports:

- 11.00-11.30 - API of cameras (Kirill Snezhko)
- 11.30-12.00 - Stereo vision (Kirill Smirnov)
- 12.00-12.30 - GSM (Yura Lilekov)

- 13.00-13.30 - Home Assistant (Sergey Savkin)
- 13.30-14.00 - Robotractor (Pavel Budnikov)
- 14.00-14.30 - Workshop (Boris Rebrov)

- 15.00-15.30 - BLE (Evgeny Savitsky)
- 15.30-16.00 - Cellular networks (Vlad Zaitsev)
- 16.00-16.30 - Sportcard (Peter Blokhin)


The bonus will be a poster presentation " Self-made computers - BrainfuckPC and others " from Artem Kashkanov. Artyom talked about his project at the summer meeting , and this time he will demonstrate the work of the assembled blocks of the relay computer ad and announce a couple of even more insane projects.