From the end of 2016 to the beginning of 2017, the hottest Internet keyword is "shared bicycle". Ofo, Mozu, Xiao Ming, Xiao Lan not only occupied the streets but also occupied the screen of the mobile phone. I believe the regulatory requirements of relevant departments will be released one after another. As venture capital continues to participate and exit, the shared bicycle market will soon be reshuffled as much as the online car market.
Share cycling competition in full swing, feeling the color is not enough
The share of the highest share of cycling is currently ofo and worship, the two companies go different routes. ofo's bike costs low, and with Alipay cooperation, users can deposit free; worship 2017 launched a small program, it is said that the number of new users mainly from micro-channel applet users, easy to use. There are many differences in the product details between the two, the differences in business model may also be farther and farther.
Today do not say how to get the two users, as well as the business model, only to say that there are locks shared bike. Ofo early use of a mechanical lock, it is said that primary school students can crack, not within the scope of our discussion, we focus on talking about the smart bicycle with a smart lock.
How to unlock a bike is to solve the core technical issues
Share cycling unlocking process
The following figure is the online spread of the motorcycle cycling unlock process. This figure should be the early motorcycle cycling unwinding process, the early worship of cyclists rely mainly on GPRS and server communications, to unlock, but when the GPRS signal is not good, the user can not unlock. So later added to the cycling and Bluetooth, so that after the phone is turned on Bluetooth, you can directly establish a Bluetooth connection with the smart lock to unlock.
Spread the online motorcycle cycling unlock principle
Early motorcycle cycling unlock process:
User scan QR code
Request to the cloud to unlock;
Cloud release unlock command to the bike;
After the bicycle is unlocked, the report status is updated to the cloud and the positioning information is continuously reported.
Cloud sends billing information to users.
In the process of unlocking, the key is to ensure that all the shared cycling and cloud server real-time communication, or user request unlock can not be executed immediately, which requires that all shared cycling in the cloud is always visible. This is also the general Internet of Things applications more common needs.
Biking cloud technology
When developing IM applications, if we want to keep the client always online, we need to maintain a long connection between the client and the server so that the server can always find our client.
Similarly, the principle of shared bicycles, all bicycles also need to maintain a long connection with the server, the Internet of Things MQTT agreement to meet this need.
MQTT (Message Queuing Telemetry Transport) is an instant messaging protocol developed by IBM that is designed to communicate with remote sensors and control devices that have limited computing power and operate in low-bandwidth, unreliable networks .
The MQTT protocol is especially suitable for scenarios like sharing a bike. Of course, we do not have to implement this protocol ourselves. Many cloud platforms provide support for the MQTT protocol or provide a more encapsulated API based on the MQTT protocol.
Biking cloud technology
Motorcycle cycling in the management of nodes in the Internet, the use of cloud computing technology, worship selected Microsoft's Azure IoT platform. For every real IoT device, the Azure IoT platform provides a matching Device Twin with properties and status that are real-time synchronized with the real device.
Wisdom bicycle riding smart, behind the fact that is for the Internet of Things cloud technology
The ride is based on Microsoft's Azure IoT solution
Only the need to modify the state of Device Twin in Azure IoT can affect the real device, such as sending an unlock instruction to the bicycle and unlocking. In the Azure IoT platform, low-power IoT devices mainly use the MQTT protocol and cloud communications.
The combination of cloud computing and the Internet of Things is becoming more and more closely linked. Cloud computing can be seen in so many IoT applications.
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