# The Architecture of an Agricultural Data Aggregation and Conversion Model for Smart Farming
## 2 Review
\begin{table}
\begin{tabular}{c c} \hline \hline
**Application Specifics** & **Issues and Limitations** \\ \hline Standardised communication technology allows operating data & The standard does not solve the issue of inputting and sending the detailed data used in farm management to different operating platforms. \\ from equipment and implements from different manufacturers & \\ implement (including non-original manufacturer) to be & Only local identifiers are supported initially. \\ connected to a single agricultural machine (specific tractor) and & \\ received in digital format. & The limited interface of the Machine and Implement Control \\ \hline The standardised ISOBUS interface has solved the problem of & The limited interface of the Machine and Implement Control \\ matching the physical connection between the tractor and an & System (MICS) with the farm management information system (FMIS) in the context of field operation and unsupported \\ implement and the electronic connection parameters & FMIS-FMIS operations with additional documentation, i.e., \\ (MICS—Mobile Implement Control System). & non-machine-type communication. \\ \hline ISOBUS-based machines (tractors, implements, and controls) & Not very well suited to outdoor operations such as center pivot irrigation, in which the irrigation sites have complex geometries. \\ are to be fitted with an AEF certification label which also & \\ identifies the components and functions of the constituent & \\ systems (universal terminal, tractor ECU, auxiliary control, task & Scalability is not fully guaranteed due to the existence of \\ controller, advanced tractor ECU, sequence control, ISOBUS & different machine data formats and farm management system \\ shortcut button, and more). & platforms that are not compatible. \\ \hline \hline \end{tabular}
\end{table} 
Table 1: The main aspects of using ISO standard 11783 in the context of data transfer. The successful conversion of XML data is achieved programmatically using a precise formulated query via Structured Query Language (SQL). To achieve this, the structure of the data to be sent must be known. The exported data must usually to be re-converted, so the query must be reformulated again. As a result set, the final query is saved and used to create the attribute string and generate the corresponding values for the new exported XML file [34]. Despite the ability to transmit large amounts of agronomic data from machinery, communication systems based on ISO 11783 (including the internal systems of the farm machine--the implement) are plagued by large volumes of data traffic [35]. In this case, it is possible to use dynamic data compression (ISOBUSComp protocol). This protocol is selected by the control unit (ECU) when sending higher-stream data via the _Compressor_/_Decompressor_ modules (for sending and receiving data, respectively). The data buffer (instantaneous storage) is selected for the maximum amount of data (_MaxBuff_) in the integrated virtual decompression machine (parameter _UDVMmz_, which allows for the processing of 65,520-byte files). To assess the critical amount of data to be sent instantaneously, the Partition and Reassembly Mechanism (_PaRM_) microcontroller is used to send the incoming data to the appropriate data compression procedure [35]. The overall architecture of the experimental system in this study consisted of a data bus connecting several of a tractor's operational control units and a data compression controller programmed in CAPL. Importantly, this data transmission technique does not require changes to the existing ISO 11783 standard.