With the development of the Internet of Things technology, the smart home field is getting more and more popular, becoming the “fertile soil†that Internet giants and home appliance giants are vying for. The paper mainly analyzes the hardware and software architecture technology of smart home.
HOW - I want to know what to do
Take a smart socket as an example. The theme I am talking about is how to make this socket and how to develop it. The first step, we have to break it down first. The socket has a lot of structural parts, such as hardware, so we have to build a team, including industrial design, structural design, hardware engineers, electronic engineers, software engineers, and life, even operating and sales. . As shown below.
In the process of transforming from a traditional device to a smart device, this thing is very important, namely the WiFi module. This place determines how efficiently this device can interact with our app and interact with it.
You can look at what we probably want to do, including component selection, schematics, structure, industrial design, PCBA, beater board, mold opening. If these things are completed, it means the traditional part is completed, so I won't go into details here. More important is how smart devices need to communicate. Now ZigBee, WiFi, Z-Wave, BLE, these four are more common, there are 433, 315 and other equipment. Google also has a set of agreements, but it is applied a little less. I mainly talk about the WiFi device in the end, and how to do it at the end of a WiFi device.
WiFi networking challenges
WiFi devices face a big problem, such as making a smart water cup, a smart socket, and the water cup and socket have no interactive interface. But we have to solve the problem that the device must be networked and connected to the router. The most direct way for everyone to think of is to connect the phone to the router, open the phone settings, enter the WiFi list, and then enter the password. But there is no way to operate in smart hardware. This is the first problem to be faced, so many people are very sad inside.
Here are a few ways to configure a WiFi device. The first one is the AP. The AP is the most traditional way. In the AP, the smart device is mainly used to enter the AP mode first, so that a hot spot can be shared. Our mobile phone is directly connected to the device, and then the router's SSID is pushed to that device, which can connect to the router online. This AP has a very troublesome thing, that is, its interaction is particularly complicated, especially in the iOS mobile phone, which does not allow the mobile phone's app to directly call the WiFi settings or directly switch past. We may have to exit the background first and then switch to Apple. That set of settings, set up and then switch back, this is particularly troublesome. So in the evolution process, I entered WPS.
WPS solves the first step problem. There can be a button in the router. There is also a button in the smart device, which can exchange its key according to the WPS protocol. But there is a big problem here. WPS needs special authentication, and there are very few routers supported, so using WPS technology may be a bit worse.
Then there is a Smart Config, this application is very much, because it is very simple, directly send the SSID and key to the router on the mobile phone, this chip then grabs the router's package, captures the package and decrypts it. After decrypting it, you will know the router's SSID and key, and then you can connect. On this basis, WeChat also has an air kiss and another Smart link, and this principle.
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