WO2019056866A1

WO2019056866A1 - Internet of things-based shared bicycle parking management system and method

Info

Publication number: WO2019056866A1
Application number: PCT/CN2018/098416
Authority: WO
Inventors: 章建国
Original assignee: 广州明希网络科技有限公司
Priority date: 2017-09-21
Filing date: 2018-08-03
Publication date: 2019-03-28
Also published as: CN107564193A

Abstract

An Internet of Things-based shared bicycle parking management system and method. The Internet of Things-based shared bicycle parking management system comprises a background control system, multiple locking and parking devices, radio frequency labels provided on shared bicycles, and a data processing SDK provided on a bicycle sharing APP; the bicycle sharing APP is controlled by a third-party bicycle sharing platform; each locking and parking device is provided with at least one bicycle dock; the bicycle dock comprises a bicycle dock body, a locker, a radio frequency identification module, as well as a master control circuit board and a first short-range wireless communication module provided in the bicycle dock body; the master control circuit board stores a locker identification code for uniquely identifying the locker. The Internet of Things-based shared bicycle parking management system and method can achieve orderly and safe parking of shared bicycles by means of automatic renting and returning on the locking and parking devices, thereby preventing a user from returning and parking a bicycle disorderly, can achieve effective supervision, high efficiency, great convenience, and low management cost, and thus can be widely applied in the shared bicycle management industry.

Description

Shared bicycle parking management system and method based on internet of things

Technical field

The present invention relates to the field of vehicle control based on the Internet of Things, and more particularly to a shared bicycle parking management system and method based on the Internet of Things.

Background technique

NB-IoT: full name Narrow Band Internet of Things, a cellular-based narrowband Internet of Things, is an emerging technology in the IoT space that supports low-power devices in the WAN cellular data connection, also known as low-power WAN. NB-IoT has long standby time and long working life. advantage;

SDK: full name Software Development Kit, a software development kit, refers to a collection of development tools used by software engineers to build application software for specific software packages, software frameworks, hardware platforms, operating systems, and the like.

The traditional shared bicycle is managed by setting the returning pile. After the returning pile is set at a fixed position, the card reader is used to scan the card reader on the pile, and after the card is successfully read, the return/borrowing is realized. Operation. This method is limited by the structure of the traditional reworked pile, the operation is extremely inconvenient, and the efficiency is low. In addition, an additional rental card is required, which not only increases the cost, but also needs to carry the rental card at any time, which is extremely inconvenient. The shared bicycle based on the time-sharing method represented by Mobye and ofo does not need to set up a re-carriage pile, which can realize the bicycle sharing with the stop-and-go, lock-and-play mode, which provides great convenience for the rider. However, this method does not impose any restrictions on the location of the returning car. It leaves the unified parking and management of the fixed returning piles. The shared bicycle parking often appears to be indiscriminately parked, occupied by sidewalks, motor vehicles, tunnels or bridge entrances and exits, etc. More manpower supervision costs are needed. Moreover, there have also been cases of adding a car lock to a shared bicycle, riding into a community, moving into a house, and other "private use of the bus", and there have also been cases where the vehicle is stolen and the password is cracked. In addition, if a fixed parking pile is to be set, unified management of the shared bicycle requires the user to lock the vehicle to the parking pile to stop, which may damage the current use of the shared bicycle and increase the difficulty of the user. Moreover, for many current shared bicycle companies, it is also necessary to consider how to maintain effective management of shared bicycles on the basis of orderly parking. Therefore, how to achieve orderly management of shared bicycles on the basis of maintaining the current shared bicycle mode is a problem.

Summary of the invention

In order to solve the above technical problems, an object of the present invention is to provide a shared bicycle parking management system and method based on the Internet of Things.

The technical solution adopted by the present invention to solve the technical problem thereof is:

A shared bicycle parking management system based on the Internet of Things, comprising a background control system, a plurality of lock parking devices, a radio frequency tag disposed on the shared bicycle, and a data processing SDK disposed on the shared bicycle APP, the shared bicycle APP being controlled by a third-party shared bicycle platform, the lock parking device is provided with at least one lock pile, the lock pile includes a lock pile body, a lock and a radio frequency identification module mounted on the lock pile body, and a lock pile body a main control circuit board and a first short-range wireless communication module, wherein the main control circuit board stores a locker identification code for uniquely identifying the lock;

The locker and the first short-range wireless communication module are both connected to the main control circuit board, and the background control system and the data processing SDK are connected by wireless communication;

The data processing SDK is configured to obtain the vehicle body two-dimensional code of the shared bicycle obtained by the shared bicycle APP scanning, obtain the vehicle label data corresponding to the shared bicycle according to the preset label database, and send the vehicle label data to the background control system;

The lock parking device is configured to perform a corresponding lock/unlock action when the user returns/borrows the vehicle, and generate corresponding transaction data of the marked return/borrowing vehicle; the transaction data includes transaction time, vehicle tag data , locker identification code and locker switch status;

The background control system is configured to generate a corresponding lock unlock command according to the vehicle tag data sent by the data processing SDK, and send the lock to the lock parking device, and is further used for calculating the transaction data when the user returns the vehicle and borrows the vehicle. The fee is sent to the shared bicycle app to charge the corresponding shared bicycle platform.

Further, the lock parking device is further provided with a node machine, wherein the node machine is provided with an NB-IoT chip and a second short-range wireless communication module, and the node machine is connected to the background control system through the NB-IoT chip, and The node machine is wirelessly connected to the first short-range wireless communication module through the second short-range wireless communication module to realize connection with the main control board of each lock pile of the lock parking device.

Further, the first short-range wireless communication module and the second short-range wireless communication module both adopt a Bluetooth communication module, the radio frequency tag adopts an RFID tag, and the radio frequency identification module adopts an RFID identifier.

Further, in the transaction data, the vehicle tag data is obtained by collecting the radio frequency tag by the radio frequency identification module.

Another technical solution adopted by the present invention to solve the technical problems thereof is:

A shared bicycle parking management method based on the Internet of Things, including steps:

S1, the user scans the body QR code of the shared bicycle through the shared bicycle APP;

S2, the data processing SDK obtains the vehicle body two-dimensional code obtained by the shared bicycle APP scanning, obtains the vehicle label data corresponding to the shared bicycle according to the preset label database, and sends the vehicle label data to the background control system;

S3. The background control system authenticates the data processing SDK, and after the authentication succeeds, generates a corresponding lock unlock command and delivers the lock to the lock parking device;

S4. The lock parking device performs a corresponding unlocking operation according to the lock unlocking instruction, realizing the borrowing of the user, and generating corresponding transaction data of the marked borrowing vehicle;

S5. The locking and parking device performs a corresponding closing operation when the user returns the vehicle, and generates corresponding transaction data for marking the returning vehicle;

S6. The background control system performs charging according to transaction data when the user returns the vehicle and borrows the vehicle, and sends the charging data to the shared bicycle APP to perform charging operation on the corresponding shared bicycle platform;

The transaction data includes transaction time, vehicle tag data, locker identification code, and locker switch status.

Further, the step S5 includes:

S51. The lock pile of the locking parking device wakes up the lock pile when detecting that the user cart is put into the pile;

S52. After the lock pile sends the transaction data of the marked returning vehicle to the shared bicycle APP through the first short-range wireless communication module, it is determined whether the response information of the marked transaction successfully forwarded by the shared bicycle APP is received within a preset time, and if yes, Entering the sleep state, on the contrary, after the lock pile wakes up the node machine by the short-range wireless communication mode, the transaction data is directly forwarded to the background control system through the node machine;

S53. The background control system receives the transaction data and updates the preset tag database.

Further, the step S52 includes:

S521, the lock pile sends the transaction data of the marked returning vehicle to the shared bicycle APP through the first short-range wireless communication module;

S522. The data processing SDK obtains the transaction data received by the shared bicycle APP and sends the transaction data to the background control system.

S523, the lock pile determines whether the response message of the marked transaction success returned by the background control system is received within the preset timeout period, and if so, enters the sleep state and ends, otherwise, proceeds to step S524;

After the S524 and the lock pile wake up the node machine by short-range wireless communication, the transaction data is directly forwarded to the background control system through the node machine.

Further, in the step S523, the response information is sent by the background processing system to the data processing SDK, and then forwarded by the data processing SDK to the lock pile through the shared bicycle APP.

Further, the step S3 specifically includes:

S31. After receiving the vehicle tag data sent by the data processing SDK, the background control system authenticates the data processing SDK, and after the authentication succeeds, parses and obtains the lock pile of the shared bicycle corresponding to the vehicle tag data;

S32, obtaining the locker identification code corresponding to the lock of the lock pile, thereby generating a corresponding locker unlock command, and sending the locker unlock command to the data processing SDK;

S33. The data processing SDK sends the lock unlock command to the corresponding lock pile on the lock parking device by sharing the bicycle APP.

Further, the following steps are also included:

The shared bicycle app obtains the command of the shared bicycle platform for controlling the shared bicycle to unlock the data according to the vehicle body two-dimensional code obtained by the scanning, and then controls the command to be issued to the shared bicycle. unlock.

The invention has the beneficial effects that the present invention can be used to park the shared bicycles in the respective lock piles by arranging the lock parking devices by arranging the lock parking devices in various places planned and approved by the government. In addition, the automatic borrowing and returning of the vehicle on the locking and parking device is realized, thereby avoiding the situation that the user releases the vehicle when the vehicle is returned, and the solution is to develop the data processing SDK on the shared bicycle APP without changing the current user. The operation mode directly maintains the scanning method of sharing the body QR code of the bicycle, so that the unlocking control of each lock pile of the lock parking device can be realized, and the borrowing of the shared bicycle can be realized, and the returning process is also shared with the existing one. The bicycle returning process is the same, simple and convenient. The invention can realize the orderly and safe parking of the shared bicycle, and can effectively supervise the shared bicycle, is efficient, convenient, and has low management cost.

DRAWINGS

1 is an electronic block diagram of an Internet of Things-based vehicle rental system of the present invention;

2 is a flow chart of an Internet of Things-based vehicle rental method of the present invention.

Detailed ways

Embodiment 1

Referring to FIG. 1, the present invention provides an IoT-based shared bicycle parking management system, including a background control system, a plurality of lock parking devices, a radio frequency tag disposed on a shared bicycle, and a data processing SDK disposed on the shared bicycle APP. The shared bicycle APP is controlled by a third party shared bicycle platform, and the lock parking device is provided with at least one lock pile, the lock pile includes a lock pile body, a lock device mounted on the lock pile body, and radio frequency identification a module, and a main control circuit board disposed in the lock pile body and a first short-range wireless communication module, wherein the main control circuit board stores a locker identification code for uniquely identifying the lock;

In this embodiment, each of the locks is provided with a unique identifier for identifying the lock. In this embodiment, the lock control code is stored in the main control circuit board, and the main control circuit board of the lock pile is controlled. When the locker performs the opening/closing operation, the transaction data is generated at the same time, and the generated transaction data includes the transaction time, the vehicle tag data, the locker identification code, and the lock switch state, and the lock switch state can be reacted. Whether the lock is normally closed/opened, the background system judges whether the transaction data is marked for returning or borrowing the vehicle according to the switch state of the lock. In this solution, the locker identification code of each locker has a unique correspondence with the vehicle tag data of the shared bicycle, and the vehicle tag data of each shared bicycle has a unique correspondence with the vehicle body QR code of the shared bicycle itself. The preset tag database stores the unique correspondence between the vehicle body QR code of the shared bicycle and the vehicle tag data, and the unique correspondence between the locker identification code of the storage locker and the vehicle tag data of the shared bicycle. The tag database can be stored in the database of the shared bicycle platform, or can be stored in the database of the background control system, and set according to user requirements. After obtaining the vehicle tag data of the shared bicycle, the background control system can obtain the locker identification code of the lock device in which the lock is located according to the tag database, that is, obtain the lock pile information of the shared bicycle.

In addition, on the basis of this, the locker identification code can also be pasted on the lock pile, and the user performs the corresponding borrowing/returning operation by scanning the locker identification code.

Further, as a preferred implementation manner, the lock parking device is further provided with a node machine, and the node machine is provided with an NB-IoT chip and a second short-range wireless communication module, and the node machine is controlled by the NB-IoT chip and the background. The system is connected, and the node machine is wirelessly connected to the first short-range wireless communication module through the second short-range wireless communication module to implement connection with the main control circuit board of each lock pile of the lock parking device. In FIG. 1, the node machine is further provided with a main controller for performing data processing control, and the main controller is respectively connected with the NB-IoT chip and the second short-range wireless communication module, and controls the NB-IoT chip and the second short-range wireless communication. The work of the module.

Further, as a preferred embodiment, the first short-range wireless communication module and the second short-range wireless communication module both adopt a Bluetooth communication module, the radio frequency tag adopts an RFID tag, and the radio frequency identification module adopts an RFID identifier.

Further as a preferred embodiment, in the transaction data, the vehicle tag data is obtained by collecting the radio frequency tag by the radio frequency identification module.

The node machine of this embodiment is used as a standby operation device when the transaction data cannot be successfully forwarded through the shared bicycle APP. After the node machine is woken up by the lock pile, the node machine starts the NB-IoT chip and other components to enter the working state, thereby passing the NB- After the IoT chip is connected with the background control system, the direct data transmission channel between the lock pile and the background control system is constructed, without the user's mobile phone, so that the lock pile can directly interact with the background control system and directly pass the return transaction data. The node machine forwards directly to the background control system. After the node machine is set up, data sharing with the background control system can be directly performed when the shared bicycle APP fails to be forwarded or a timeout occurs, and the transaction data is uploaded in time. Therefore, various modes of vehicle rental can be realized, and the system is more stable. In addition, on the basis of this, it is also possible to set the node machine to cache when forwarding transaction data, and then send the buffer after reaching a certain number of N, so that the power consumption of the NB-IoT chip can be saved.

In this embodiment, after installing the radio frequency tag on the user's vehicle, when the user returns the car, as long as the shared bicycle is pushed onto the lock pile, the lock pile can automatically lock the car, and the radio frequency identification module reads the radio frequency tag to obtain the vehicle tag of the shared bicycle. The data is sent to the background control system by the shared bicycle APP or the node machine to transmit the transaction data composed of the vehicle tag data and the like, thereby marking the user's returning operation, which is convenient and quick. When the vehicle is borrowed, the user scans the vehicle QR code by sharing the bicycle APP, so that the data processing SDK built in the shared bicycle APP can obtain the vehicle label data corresponding to the shared bicycle according to the vehicle two-dimensional code, thereby performing data with the background control system. The interaction, the background control system can obtain the corresponding lock pile information according to the vehicle tag data analysis, thereby generating the corresponding lock pile unlocking instruction, and sequentially sending the lock to the lock pile through the data processing SDK and the shared bicycle APP, so as to perform the unlocking action. Realize the user's borrowing. In this process, the unlocking process of the bicycle lock set by the bicycle itself is the same as the current one. Therefore, with this scheme, the orderly parking of the shared bicycle can be realized while maintaining the current operation mode of the user.

The system is provided with a lock parking device, and the third-party shared bicycle platform can park its shared bicycle on each lock pile by arranging the lock parking device in various places planned and approved by the government, thereby realizing the lock parking. The automatic borrowing and returning on the device avoids the situation that the user releases the car when the car is returned, and the solution develops the data processing SDK on the shared bicycle APP, and does not need to change the current user operation mode, and directly maintains the scanning shared bicycle. The two-dimensional code of the vehicle body can realize the unlocking control of each lock pile of the lock parking device, and realize the borrowing of the shared bicycle. In addition, the returning process is the same as the existing shared bicycle returning process, and is simple. Convenience. The system can realize the orderly and safe parking of the shared bicycle, and can effectively supervise the shared bicycle, which is efficient, convenient, and low in management cost.

Embodiment 2

Referring to FIG. 2, the embodiment is a shared bicycle parking management method based on the Internet of Things, which includes the following steps:

Further, as a preferred implementation, the step S5 includes:

Further, as a preferred implementation, the step S52 includes:

Further, as a preferred implementation manner, in the step S523, the response information is sent by the background processing system to the data processing SDK, and then forwarded by the data processing SDK to the lock pile through the shared bicycle APP.

Further, as a preferred implementation, the step S3 includes:

Further as a preferred embodiment, the method further includes the following steps:

A detailed shared bicycle parking management method based on the shared bicycle parking management system according to the first embodiment of the present invention is as follows:

Step 1. When the user wants to borrow a car, the shared bicycle app installed by the mobile phone scans the QR code of the shared bicycle;

Step 2: The shared bicycle app obtains a command for controlling the shared bicycle to unlock and sends the command to the shared bicycle after the data is exchanged with the shared bicycle platform according to the vehicle body two-dimensional code obtained by the scanning. To control the unlocking; more specifically, how the shared bicycle platform controls the lock of the shared bicycle to unlock and lock the details, which is controlled by the shared bicycle platform, and the method does not change it. There is no need to change the user's usage habits.

Step 3: After the data processing SDK built in the shared bicycle APP obtains the vehicle body two-dimensional code obtained by the shared bicycle APP scanning, the vehicle label data corresponding to the shared bicycle is obtained according to the preset label database, and is sent to the background control system.

Step 4: The background control system authenticates the data processing SDK, and after the authentication succeeds, generates a corresponding locker unlock command and sends it to the lock parking device; the authentication here is mainly combined with the data processing SDK. The vehicle tag data is used to determine whether the lock pile of the vehicle is normal. If it is normal, the authentication is passed.

Step 5: The lock parking device performs a corresponding unlocking operation according to the lock unlocking instruction, realizing the user's borrowing, and generating corresponding transaction data of the marked borrowing vehicle; specifically, performing the unlocking action according to the unlocking instruction is the corresponding locking pile The main control board of the lock pile controls the action of the lock according to the received command; the transaction data includes transaction time, vehicle tag data, locker identification code and lock switch status.

Step 7. When the user wants to return the vehicle, the locking parking device performs a corresponding closing operation when the user returns the vehicle, and generates corresponding transaction data for marking the returning vehicle; similarly, the transaction data includes transaction time, vehicle tag data, and lock. Stop identifier and lock switch status.

Step 7. The background control system performs charging according to the transaction data when the user returns the vehicle and borrows the vehicle, and sends the charging data to the shared bicycle APP to perform charging operation on the corresponding shared bicycle platform.

In this implementation, the first short-range wireless communication module adopts a Bluetooth communication module, and therefore, the short-range communication process is a Bluetooth communication process.

The method can realize the automatic borrowing and returning of the vehicle on the locking and parking device, avoiding the situation that the user releases the vehicle when the vehicle is returned, and does not need to change the current user operation mode, and directly maintains the manner of scanning the body QR code of the shared bicycle. The unlocking control of each lock pile of the lock parking device can be realized, and the borrowing of the shared bicycle can be realized. In addition, the returning process is the same as the existing shared bicycle returning process, which is simple and convenient. The method can realize the orderly and safe parking of the shared bicycle, and can effectively supervise the shared bicycle, which is efficient, convenient, and low in management cost.

The above is a detailed description of the preferred embodiments of the present invention, but the present invention is not limited to the embodiments, and various equivalent modifications or substitutions can be made by those skilled in the art without departing from the spirit of the invention. Such equivalent modifications or alternatives are intended to be included within the scope of the claims.

Claims

A shared bicycle parking management system based on the Internet of Things, comprising: a background control system, a plurality of lock parking devices, a radio frequency tag disposed on the shared bicycle, and a data processing SDK disposed on the shared bicycle APP, the shared bicycle The APP is controlled by a third party shared bicycle platform, and the lock parking device is provided with at least one lock pile, the lock pile includes a lock pile body, a lock and a radio frequency identification module mounted on the lock pile body, and a setting a main control circuit board and a first short-range wireless communication module in the lock pile body, wherein the main control circuit board stores a locker identification code for uniquely identifying the lock;

The locker and the first short-range wireless communication module are both connected to the main control circuit board, and the background control system and the data processing SDK are connected by wireless communication;

The data processing SDK is configured to obtain the vehicle body two-dimensional code of the shared bicycle obtained by the shared bicycle APP scanning, obtain the vehicle label data corresponding to the shared bicycle according to the preset label database, and send the vehicle label data to the background control system;

The lock parking device is configured to perform a corresponding lock/unlock action when the user returns/borrows the vehicle, and generate corresponding transaction data of the marked return/borrowing vehicle; the transaction data includes transaction time, vehicle tag data , locker identification code and locker switch status;

The background control system is configured to generate a corresponding lock unlock command according to the vehicle tag data sent by the data processing SDK, and send the lock to the lock parking device, and is further used for calculating the transaction data when the user returns the vehicle and borrows the vehicle. The fee is sent to the shared bicycle app to charge the corresponding shared bicycle platform.
The IoT-based shared bicycle parking management system according to claim 1, wherein the lock parking device is further provided with a node machine, wherein the node machine is provided with an NB-IoT chip and a second short-range wireless communication a module, the node machine is connected to the background control system through the NB-IoT chip, and the node machine is wirelessly connected to the first short-range wireless communication module by the second short-range wireless communication module, and realizes each of the locking and parking devices The connection of the main control board of the lock pile.
The IoT-based shared bicycle parking management system according to claim 2, wherein the first short-range wireless communication module and the second short-range wireless communication module both adopt a Bluetooth communication module, and the radio frequency tag adopts RFID. A tag, the RFID module employing an RFID recognizer.
The IoT-based shared bicycle parking management system according to claim 1, wherein in the transaction data, the vehicle tag data is obtained by collecting a radio frequency tag by the radio frequency identification module.
The shared bicycle parking management method based on the Internet of Things is characterized in that it comprises the steps of:

S1, the user scans the body QR code of the shared bicycle through the shared bicycle APP;

S2, the data processing SDK obtains the vehicle body two-dimensional code obtained by the shared bicycle APP scanning, obtains the vehicle label data corresponding to the shared bicycle according to the preset label database, and sends the vehicle label data to the background control system;

S3. The background control system authenticates the data processing SDK, and after the authentication succeeds, generates a corresponding lock unlock command and delivers the lock to the lock parking device;

S4. The lock parking device performs a corresponding unlocking operation according to the lock unlocking instruction, realizing the borrowing of the user, and generating corresponding transaction data of the marked borrowing vehicle;

S5. The locking and parking device performs a corresponding closing operation when the user returns the vehicle, and generates corresponding transaction data for marking the returning vehicle;

S6. The background control system performs charging according to transaction data when the user returns the vehicle and borrows the vehicle, and sends the charging data to the shared bicycle APP to perform charging operation on the corresponding shared bicycle platform;

The transaction data includes transaction time, vehicle tag data, locker identification code, and locker switch status.
The IoT-based shared bicycle parking management method according to claim 5, wherein the step S5 comprises:

S51. The lock pile of the locking parking device wakes up the lock pile when detecting that the user cart is put into the pile;

S52. After the lock pile sends the transaction data of the marked returning vehicle to the shared bicycle APP through the first short-range wireless communication module, it is determined whether the response information of the marked transaction successfully forwarded by the shared bicycle APP is received within a preset time, and if yes, Entering the sleep state, on the contrary, after the lock pile wakes up the node machine by the short-range wireless communication mode, the transaction data is directly forwarded to the background control system through the node machine;

S53. The background control system receives the transaction data and updates the preset tag database.
The IoT-based shared bicycle parking management method according to claim 6, wherein the step S52 specifically includes:

S521, the lock pile sends the transaction data of the marked returning vehicle to the shared bicycle APP through the first short-range wireless communication module;

S522. The data processing SDK obtains the transaction data received by the shared bicycle APP and sends the transaction data to the background control system.

S523, the lock pile determines whether the response message of the marked transaction success returned by the background control system is received within the preset timeout period, and if so, enters the sleep state and ends, otherwise, proceeds to step S524;

After the S524 and the lock pile wake up the node machine by short-range wireless communication, the transaction data is directly forwarded to the background control system through the node machine.
The IoT-based shared bicycle parking management method according to claim 7, wherein in the step S523, the response information is sent by the background control system to the data processing SDK, and the data processing SDK passes the shared bicycle APP. Forwarded to the lock pile.
The IoT-based shared bicycle parking management method according to claim 5, wherein the step S3 comprises:

S31. After receiving the vehicle tag data sent by the data processing SDK, the background control system authenticates the data processing SDK, and after the authentication succeeds, parses and obtains the lock pile of the shared bicycle corresponding to the vehicle tag data;

S32, obtaining the locker identification code corresponding to the lock of the lock pile, thereby generating a corresponding locker unlock command, and sending the locker unlock command to the data processing SDK;

S33. The data processing SDK sends the lock unlock command to the corresponding lock pile on the lock parking device by sharing the bicycle APP.
The IoT-based shared bicycle parking management method according to claim 5, further comprising the following steps:

The shared bicycle app obtains the command of the shared bicycle platform for controlling the shared bicycle to unlock the data according to the vehicle body two-dimensional code obtained by the scanning, and then controls the command to be issued to the shared bicycle. unlock.