CN111142905B - OTA upgrading method, OTA server and OTA upgrading system - Google Patents
OTA upgrading method, OTA server and OTA upgrading system Download PDFInfo
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Abstract
The invention provides an OTA upgrading method, which comprises the following steps: when the OTA server receives a system version inquiry request sent by the intelligent terminal, inquiring whether a new system version exists in the OTA server; when a new system version is inquired, a pre-upgrading instruction is sent to the intelligent terminal; acquiring serial number information of the intelligent terminal, and adding an upgrade time character at the tail part of a system upgrade package; when the last characters of the serial number information of the intelligent terminal are the same as the upgrading time characters at the tail part of the system upgrading packet, the OTA server sends an upgrading instruction to the intelligent terminal; the OTA server copies and partitions the system upgrade package; the OTA server sends the divided system upgrade packages to the intelligent terminal one by one in sequence until all transmission is finished, and OTA is an over-the-air downloading technology. According to the invention, OTA upgrading is carried out in batches according to the serial number information of the intelligent terminals, so that the condition that a large number of intelligent terminals access the server in a centralized way to cause overload of the server is avoided.
Description
Technical Field
The invention relates to the technical field of Internet, in particular to an OTA upgrading method, an OTA server for realizing the OTA upgrading method and an OTA upgrading system.
Background
OTA (Over-the-AirTechnology, space download technology) upgrade is a standard software upgrade mode provided by Android system, which is a technology for remotely managing SIM card data and applications through an air interface of mobile communication (GSM or CDMA). The air interface may employ WAP, GPRS, CDMA X and short message technology. The application of OTA technology allows mobile communications to provide not only voice and data services, but also new traffic downloads. The Android intelligent terminal or the iOS intelligent terminal has an OTA upgrading function, and through the function, whether a new system of a device manufacturer can be upgraded or not can be detected online, and the upgrading is completed by downloading a system upgrading package through a WiFi wireless network or a mobile phone mobile network. Compared with the traditional updating of the machine, the OTA updating can be directly finished in the intelligent terminal on line, only by means of a network, and the updating does not need backup data.
However, in the following manner of the conventional OTA upgrading, the intelligent terminal periodically queries whether a new version exists on the server through the network according to a set query period, downloads and upgrades the new version after querying the new version, and if the network is disconnected or power is off during the downloading process, performs breakpoint continuous transmission after recovery. This approach is prone to situations where a large number of intelligent terminals are accessing the server in a centralized manner at the same time, resulting in server overload. And the mode needs to occupy a large amount of storage space of the intelligent terminal under the condition of large capacity of the system upgrade package.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides an OTA upgrading method which is applied to an OTA server and used for upgrading OTA in batches according to serial number information of intelligent terminals, so that the condition that the server is overloaded due to centralized access of a large number of intelligent terminals is avoided. And the system upgrade package is divided into a plurality of data packages to be transmitted successively, so that the situation that a large amount of storage space of the intelligent terminal is occupied due to overlarge system upgrade package is avoided.
The OTA upgrading method of the invention comprises the following steps:
S1: when the OTA server receives a system version query request automatically sent by the intelligent terminal, querying whether a new system version exists in the OTA server;
s2: when a new system version is inquired, a pre-upgrading instruction is sent to the intelligent terminal;
s3: acquiring serial number information of an intelligent terminal, and adding an upgrading time character at the tail part of a system upgrading packet of the system version;
S4: when the last characters of the serial number information of the intelligent terminal are the same as the upgrading time characters at the tail part of the system upgrading packet, the OTA server sends an upgrading instruction to the intelligent terminal;
S5: the OTA server copies and partitions the system upgrade package;
S6: the OTA server sends a plurality of divided system upgrade packages to the intelligent terminal one by one in sequence until the divided system upgrade packages are completely transmitted, wherein OTA is an over-the-air downloading technology;
S7: and after receiving the complete system upgrading packet, the intelligent terminal performs OTA upgrading.
In step S1, when the OTA server queries that no new system version exists, the OTA upgrade is directly ended.
In step S4, when the last characters of the serial number information of the intelligent terminal are different from the characters at the tail of the system upgrading packet, the OTA upgrading is directly ended.
In step S1, an OTA upgrade program is preset in the intelligent terminal, and a system upgrade period is set, and in the system upgrade period, the intelligent terminal automatically sends a system version query request to an OTA server.
In step S4, the intelligent terminal receiving the upgrade instruction feeds back the upgrade confirmation instruction to the OTA server, and in step S5, the OTA server processes the system upgrade package after receiving the upgrade confirmation instruction fed back by the intelligent terminal to the upgrade instruction.
The invention further improves, in step S6, when the intelligent terminal suddenly breaks the network or cuts off the power supply, the method further comprises the following steps:
S601: after the network of the intelligent terminal is restored, the intelligent terminal automatically establishes connection with the OTA server and sends a continuous upgrading request;
S602: after receiving the continuous upgrading request, the OTA server sends a continuous upgrading instruction to the intelligent terminal;
S603: after receiving the continuous upgrading instruction, the intelligent terminal sends the character which is used for representing the segmentation sequence and is used for representing the tail part of the last received data packet to the OTA server;
S604: the OTA server reads the tail sequence characters of the plurality of system upgrade packages after segmentation in sequence, and when the tail sequence characters of the received data packages are completely consistent with the tail sequence characters of a certain system upgrade package after segmentation, the plurality of upgrade packages after the upgrade packages in the segmentation sequence are sequentially sent to the intelligent terminal one by one;
s605: and the OTA server finishes the transmission of the divided system upgrade package and finishes the OTA upgrade.
The invention also provides an OTA server for realizing the OTA upgrading method, which comprises the following steps:
and a receiving module: the system version query request is used for receiving a system version query request automatically sent by the intelligent terminal;
and a query module: the system version query method is used for querying whether a new system version exists in the OTA server or not when a system version query request sent by the intelligent terminal automatically is received;
A first sending module: the system is used for sending a pre-upgrading instruction to the intelligent terminal when the existence of a new system version is inquired;
The acquisition module is used for: the method comprises the steps of obtaining serial number information of an intelligent terminal;
the system upgrade package processing module: the system upgrading package tail part is used for adding upgrading time characters into the system upgrading package tail part of the system version;
Judging and transmitting module: the method comprises the steps of judging whether last characters of the serial number information of the intelligent terminal are identical to upgrading time characters at the tail part of a system upgrading packet, and if so, sending an upgrading instruction to the intelligent terminal;
And (3) a replication segmentation module: the system upgrade package is used for copying and dividing the system upgrade package;
And a second sending module: and the system upgrading method is used for sequentially sending the plurality of divided system upgrading packets to the intelligent terminal one by one until the divided system upgrading packets are completely transmitted.
The invention also provides an OTA upgrading system comprising the OTA server, and the OTA upgrading system further comprises an intelligent terminal, wherein an OTA upgrading program is arranged in the intelligent terminal, a system upgrading period is set, and in the system upgrading period, the intelligent terminal automatically sends a system version inquiry request to the OTA server, and OTA upgrading is carried out after receiving a complete system upgrading packet sent by the OTA.
The invention further improves, the OTA upgrade procedure of the intelligent terminal comprises:
the sending module is used for automatically sending a system version inquiry request to the OTA server, sending feedback confirmation information after receiving an upgrading instruction sent by the OTA server, and sending a continuous upgrading request after the network of the intelligent terminal is recovered and sending a character which is used for representing the segmentation sequence and is received at the tail part of the last data packet before network disconnection;
The receiving module is used for receiving a pre-upgrade instruction, an upgrade instruction, a continuous upgrade instruction and a system upgrade package which are sent by the OTA server;
The setting module is used for setting the third storage module;
The third storage module is used for storing a plurality of data packets sent by the OTA server;
The comparison module is used for comparing the data in the third storage module with the corresponding data of the original system of the intelligent terminal and sending the comparison result to the processing module;
The processing module is used for sending a replacement instruction to the replacement module when the data in the third storage module is received to be inconsistent with the corresponding data of the original system of the intelligent terminal; the processing module is also used for sending a deleting instruction to the deleting module when the data in the third storage module is received to be consistent with the corresponding data of the original system of the intelligent terminal;
the replacing module is used for replacing the corresponding data of the original system with the data in the third storage module after receiving the replacing instruction;
And the deleting module is used for deleting the data in the third storage module after receiving the deleting instruction.
Compared with the prior art, the invention has the beneficial effects that: after the intelligent terminal is disconnected or powered off, breakpoint continuous transmission is realized when the intelligent terminal is reconnected; OTA upgrading is carried out in batches according to serial number information of the intelligent terminals, so that the condition that a large number of intelligent terminals access the server in a centralized manner to cause overload of the server is avoided; the system upgrade package can be divided into a plurality of data packages to be transmitted successively, so that the condition that a large amount of storage space of the intelligent terminal is occupied due to overlarge system upgrade package is avoided.
Drawings
FIG. 1 is a flow chart of an OTA upgrade method of the present invention;
FIG. 2 is a flow chart of breakpoint resume of the OTA upgrade method of the present invention;
FIG. 3 is a block diagram of an OTA server module of the present invention;
Fig. 4 is a block diagram of an intelligent terminal according to the present invention.
Detailed Description
The invention will be described in further detail with reference to the drawings and examples.
As shown in fig. 1, the OTA upgrading method of the present invention includes the following steps:
S1: when the OTA server receives a system version query request automatically sent by the intelligent terminal, querying whether a new system version exists in the OTA server;
s2: when a new system version is inquired, a pre-upgrading instruction is sent to the intelligent terminal;
s3: acquiring serial number information of an intelligent terminal, and adding an upgrading time character at the tail part of a system upgrading packet of the system version;
S4: when the last characters of the serial number information of the intelligent terminal are the same as the upgrading time characters at the tail part of the system upgrading packet, the OTA server sends an upgrading instruction to the intelligent terminal;
S5: the OTA server copies and partitions the system upgrade package;
S6: the OTA server sends a plurality of divided system upgrade packages to the intelligent terminal one by one in sequence until the divided system upgrade packages are completely transmitted, wherein OTA is an over-the-air downloading technology;
S7: and after receiving the complete system upgrading packet, the intelligent terminal performs OTA upgrading.
And a first storage module is arranged in the OTA server, and the system upgrade package is stored in the first storage module. The OTA server is provided with a clock module and a counting module, the clock period of the clock module is set according to the set system upgrading period and the number of all intelligent terminals needing OTA upgrading, and the counting module is started every time one clock period is finished, namely, the character of the tail part of the system upgrading packet representing the upgrading time is increased by 1.
When the system upgrading period is 30 days and the number of all intelligent terminals needing OTA upgrading is 3 ten thousand, the clock period of the clock module can be set to be 1 day, and the character representing the upgrading time at the tail part of the system upgrading packet is added with 1 every 1 day, namely 3 ten thousand devices are upgraded in an upgrading period of 30 days, so that the condition that the server is overloaded due to the fact that a large number of intelligent terminals intensively access the server is avoided;
And a third storage module is arranged in the intelligent terminal and used for storing the received data packets, and each time the intelligent terminal receives one data packet, the data packet is stored in the third storage module and compared with the corresponding data of the original system of the intelligent terminal.
When the data in the storage module is different from the corresponding data of the original system of the intelligent terminal, replacing the corresponding data of the original system with the data in the storage module; when the data in the storage module is the same as the corresponding data of the original system of the intelligent terminal, deleting the data in the storage module until all the data packets in the second storage module of the OTA server are transmitted;
As shown in fig. 1, after the execution of step S7 is finished and the OTA upgrade is finished, the system automatically enters a waiting period, the whole system upgrade period is divided into a plurality of clock periods according to the total number of intelligent terminals to be upgraded, when the next clock period starts, the step S1 is skipped and executed, the OTA upgrade of the intelligent terminals with the clock period conforming to the condition is completed, and the OTA upgrade of all intelligent terminal devices is completed within the whole set system upgrade period.
In step S1 of the above OTA upgrading method, when the OTA server queries that no new system version exists, the OTA upgrading is directly ended.
In step S4 of the above OTA upgrading method, when the last characters of the string number information of the intelligent terminal are different from the characters at the tail of the system upgrading packet, the OTA upgrading is directly ended.
In step S1 of the above OTA upgrading method, an OTA upgrading program is preset in the intelligent terminal, and a system upgrading period is set, and in the system upgrading period, the intelligent terminal automatically sends a system version query request to an OTA server.
In step S4 of the above OTA upgrading method, the intelligent terminal that receives the upgrading instruction feeds back an upgrading confirmation instruction to the OTA server, and in step S5, the OTA server processes the system upgrading packet after receiving the upgrading confirmation instruction fed back by the intelligent terminal to the upgrading instruction.
As shown in fig. 2, in step S6 of the above OTA upgrading method, when the intelligent terminal is suddenly disconnected or powered off, the method further includes the following steps:
S601: after the network of the intelligent terminal is restored, the intelligent terminal automatically establishes connection with the OTA server and sends a continuous upgrading request;
S602: after receiving the continuous upgrading request, the OTA server sends a continuous upgrading instruction to the intelligent terminal;
S603: after receiving the continuous upgrading instruction, the intelligent terminal sends the character which is used for representing the segmentation sequence and is used for representing the tail part of the last received data packet to the OTA server;
S604: the OTA server reads the tail sequence characters of the plurality of system upgrade packages after segmentation in sequence, and when the tail sequence characters of the received data packages are completely consistent with the tail sequence characters of a certain system upgrade package after segmentation, the plurality of upgrade packages after the upgrade packages in the segmentation sequence are sequentially sent to the intelligent terminal one by one;
s605: and the OTA server finishes the transmission of the divided system upgrade package and finishes the OTA upgrade.
As shown in fig. 3, the present invention further provides an OTA server for implementing the above-mentioned OTA upgrading method, including:
The receiving module is used for receiving a system version inquiry request and a continuous upgrading request sent by the intelligent terminal, receiving characters used for representing a segmentation sequence and sent by the intelligent terminal at the tail part of a data packet, and receiving feedback confirmation information which is sent by the intelligent terminal and agrees to start OTA upgrading;
The query module is used for querying whether a new system version exists in the OTA server or not when a system version query request sent by the intelligent terminal automatically is received;
the first sending module is used for sending a pre-upgrading instruction to the intelligent terminal when the existence of a new system version is inquired;
The system comprises an acquisition module, a processing module and a processing module, wherein the acquisition module is used for acquiring serial number information of the intelligent terminal, wherein the last characters of the serial number information represent fixed upgrading time of the intelligent terminal and are unchangeable;
The system upgrade package processing module is used for adding upgrade time characters at the tail part of the system upgrade package of the system version to represent the segmentation sequence of the data package; the system is also used for setting a first storage module and a second storage module and storing a system upgrade package; the system is also used for setting a clock module and a counting module, the clock module is used for timing, the clock period is set according to the system upgrading period and the number of intelligent terminals needing OTA upgrading, the counting module is used for counting, the counting module is started every time one clock period is finished, and the counting module adds 1 to a character of the tail part of the system upgrading packet for representing upgrading time.
The judging and transmitting module is used for judging whether the last characters of the serial number information of the intelligent terminal are the same as the upgrading time characters at the tail part of the system upgrading packet, and if so, transmitting an upgrading instruction to the intelligent terminal;
The copying and dividing module is used for copying and dividing the system upgrade package, copying the system upgrade package stored in the first storage module into the second storage module, and dividing the system upgrade package stored in the second storage module into a plurality of data packages;
And the second sending module is used for sequentially sending the plurality of divided system upgrade packages to the intelligent terminal one by one until the divided system upgrade packages are completely transmitted.
As shown in fig. 4, the present invention further provides an OTA upgrade system including the above OTA server, and further includes an intelligent terminal, where an OTA upgrade program is set in the intelligent terminal, and a system upgrade period is set, and in the system upgrade period, the intelligent terminal automatically sends a system version query request to the OTA server, and performs OTA upgrade after receiving a complete system upgrade packet sent by the OTA.
The OTA upgrading program of the intelligent terminal comprises the following steps:
The sending module is used for sending a system version query request to the OTA server, wherein the system version query request is used for requesting the OTA server to query whether a system version higher than the current version of the intelligent terminal exists in the server or not; the sending module is further used for sending a continuous upgrading request to the OTA server; the sending module is further used for sending the tail part of the last received data packet to the OTA server for representing the characters of the segmentation sequence after the intelligent terminal is recovered to be normal when the intelligent terminal is disconnected or is powered off; the sending module is further configured to send feedback confirmation information to the OTA server, where the feedback confirmation information indicates that the OTA server agrees to start the OTA upgrade, that is, the OTA server may start sending a system upgrade packet to the intelligent terminal;
The receiving module is used for receiving a pre-upgrade instruction, an upgrade instruction, a continuous upgrade instruction and a system upgrade package which are sent by the OTA server;
The setting module is used for setting the third storage module;
The third storage module is used for storing a plurality of data packets sent by the OTA server;
The comparison module is used for comparing the data in the third storage module with the corresponding data of the original system of the intelligent terminal and sending the comparison result to the processing module;
The processing module is used for sending a replacement instruction to the replacement module when the data in the third storage module is received to be inconsistent with the corresponding data of the original system of the intelligent terminal; the processing module is also used for sending a deleting instruction to the deleting module when the data in the third storage module is received to be consistent with the corresponding data of the original system of the intelligent terminal;
the replacing module is used for replacing the corresponding data of the original system with the data in the third storage module after receiving the replacing instruction;
And the deleting module is used for deleting the data in the third storage module after receiving the deleting instruction.
The beneficial effects of the invention are as follows: after the intelligent terminal is disconnected or powered off, breakpoint continuous transmission is realized when the intelligent terminal is reconnected; OTA upgrading is carried out in batches according to serial number information of the intelligent terminals, so that the condition that a large number of intelligent terminals access the server in a centralized manner to cause overload of the server is avoided; the system upgrade package can be divided into a plurality of data packages to be transmitted successively, so that the condition that a large amount of storage space of the intelligent terminal is occupied due to overlarge system upgrade package is avoided.
The above embodiments are preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, which includes but is not limited to the embodiments, and equivalent modifications according to the present invention are within the scope of the present invention.
Claims (9)
1. An OTA upgrading method is characterized by comprising the following steps:
S1: when the OTA server receives a system version query request automatically sent by the intelligent terminal, querying whether a new system version exists in the OTA server;
s2: when a new system version is inquired, a pre-upgrading instruction is sent to the intelligent terminal;
S3: acquiring serial number information of an intelligent terminal, adding an upgrade time character at the tail part of a system upgrade package of the system version, setting a clock module and a counting module in an OTA server, setting clock cycles of the clock module according to a set system upgrade period and the number of all intelligent terminals needing OTA upgrade, and starting the counting module when one clock cycle is finished, namely adding 1 to the character of the system upgrade package tail part representing the upgrade time;
S4: when the last characters of the serial number information of the intelligent terminal are the same as the upgrading time characters at the tail part of the system upgrading packet, the OTA server sends an upgrading instruction to the intelligent terminal;
S5: the OTA server copies and partitions the system upgrade package;
S6: the OTA server sends a plurality of divided system upgrade packages to the intelligent terminal one by one in sequence until the divided system upgrade packages are completely transmitted, wherein OTA is an over-the-air downloading technology;
S7: and after receiving the complete system upgrading packet, the intelligent terminal performs OTA upgrading.
2. The OTA upgrade method of claim 1 wherein: in step S1: and directly ending the OTA upgrade when the OTA server inquires that a new system version does not exist.
3. The OTA upgrade method of claim 2 wherein: in step S4, when the last characters of the serial number information of the intelligent terminal are different from the characters at the tail of the system upgrade package, the OTA upgrade is directly ended.
4. The OTA upgrade method of claim 1 wherein: in step S1, an OTA upgrade procedure is preset in the intelligent terminal, and a system upgrade period is set, and in the system upgrade period, the intelligent terminal automatically sends a system version query request to an OTA server.
5. The OTA upgrade method of claim 1 wherein: in step S4, the intelligent terminal receiving the upgrade instruction feeds back a confirmation upgrade instruction to the OTA server, and in step S5, the OTA server processes the system upgrade package after receiving the confirmation upgrade instruction fed back by the intelligent terminal to the upgrade instruction.
6. The OTA upgrade method of claim 1 wherein: in step S6, when the intelligent terminal suddenly breaks the network or is powered off, the method further includes the following steps:
S601: after the network of the intelligent terminal is restored, the intelligent terminal automatically establishes connection with the OTA server and sends a continuous upgrading request;
S602: after receiving the continuous upgrading request, the OTA server sends a continuous upgrading instruction to the intelligent terminal;
S603: after receiving the continuous upgrading instruction, the intelligent terminal sends the character which is used for representing the segmentation sequence and is used for representing the tail part of the last received data packet to the OTA server;
S604: the OTA server reads the tail sequence characters of the plurality of system upgrade packages after segmentation in sequence, and when the tail sequence characters of the received data packages are completely consistent with the tail sequence characters of a certain system upgrade package after segmentation, the plurality of upgrade packages after the upgrade packages in the segmentation sequence are sequentially sent to the intelligent terminal one by one;
s605: and the OTA server finishes the transmission of the divided system upgrade package and finishes the OTA upgrade.
7. An OTA server for implementing the OTA upgrading method according to any one of claims 1-6, comprising:
and a receiving module: the system version query request is used for receiving a system version query request automatically sent by the intelligent terminal;
and a query module: the system version query method is used for querying whether a new system version exists in the OTA server or not when a system version query request sent by the intelligent terminal automatically is received;
A first sending module: the system is used for sending a pre-upgrading instruction to the intelligent terminal when the existence of a new system version is inquired;
The acquisition module is used for: the method comprises the steps of obtaining serial number information of an intelligent terminal;
the system upgrade package processing module: the system upgrading package tail part is used for adding upgrading time characters into the system upgrading package tail part of the system version;
Judging and transmitting module: the method comprises the steps of judging whether last characters of the serial number information of the intelligent terminal are identical to upgrading time characters at the tail part of a system upgrading packet, and if so, sending an upgrading instruction to the intelligent terminal;
And (3) a replication segmentation module: the system upgrade package is used for copying and dividing the system upgrade package;
And a second sending module: and the system upgrading method is used for sequentially sending the plurality of divided system upgrading packets to the intelligent terminal one by one until the divided system upgrading packets are completely transmitted.
8. An OTA upgrade system comprising the OTA server of claim 7 wherein: the intelligent terminal is internally provided with an OTA upgrading program and is used for setting a system upgrading period, and in the system upgrading period, the intelligent terminal automatically sends a system version inquiry request to an OTA server, and OTA upgrading is carried out after receiving a complete system upgrading packet sent by OTA.
9. The OTA upgrade system of claim 8 wherein the OTA upgrade procedure of the intelligent terminal comprises:
And a sending module: the system is used for automatically sending a system version inquiry request to the OTA server, sending feedback confirmation information after receiving an upgrading instruction sent by the OTA server, and sending a continuous upgrading request after the network of the intelligent terminal is recovered and sending a character for representing the segmentation sequence at the tail part of the last data packet received before network disconnection;
And a receiving module: the system comprises a pre-upgrade instruction, an upgrade instruction, a continuous upgrade instruction and a system upgrade package, wherein the pre-upgrade instruction, the continuous upgrade instruction and the system upgrade package are sent by an OTA server;
And (3) a setting module: for setting a third memory module;
And a third storage module: the OTA server is used for storing a plurality of data packets sent by the OTA server;
And a comparison module: the data processing module is used for comparing the data in the third storage module with corresponding data of the original system of the intelligent terminal and sending the comparison result to the processing module;
The processing module is used for: when the data in the third storage module is received to be inconsistent with the corresponding data of the original system of the intelligent terminal, a replacement instruction is sent to the replacement module; the processing module is also used for sending a deleting instruction to the deleting module when the data in the third storage module is received to be consistent with the corresponding data of the original system of the intelligent terminal;
and (3) a replacement module: the data storage module is used for storing the data in the first storage module into corresponding data of the original system after receiving the replacement instruction;
and a deletion module: and the data in the third storage module is deleted after the deleting instruction is received.
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| CN112217796A (en) * | 2020-09-07 | 2021-01-12 | 西安通软软件科技有限公司 | Internet of things module software upgrading method based on encryption technology |
| CN112667260B (en) * | 2020-12-31 | 2024-04-19 | 红石阳光（北京）科技股份有限公司 | OTA remote upgrading system and method based on intelligent brain |
| CN113031990B (en) * | 2021-03-31 | 2023-07-07 | 合安科技技术有限公司 | Broadcasting upgrading method, system, equipment and storage medium of street lamp terminal |
| CN114172899B (en) * | 2022-02-10 | 2022-05-27 | 杭州锐思客技术有限公司 | OTA (over the air) upgrading method and system based on ZigBee network |
| CN115373721B (en) * | 2022-08-06 | 2023-03-14 | 佛山市银河兰晶科技股份有限公司 | OTA (over the air) upgrading method and system of intelligent LED |
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