A distinction is made between data recording<\/strong> and data transmission\/data synchronisation<\/strong>.<\/p>\n\n During data recording<\/strong>, a data record, for example the measured values of sensors, is provided with the current time (time stamp) and stored in the device. No connection to the server is required at the time of recording. The data is temporarily stored on the device.<\/p>\n\n For data recording, the clear recommendation is: “As much as necessary, as little as possible”<\/strong>. This is because storing the data ties up resources on the device. Special memory chips (flash) are used for this purpose. Flash memories have the characteristic that write accesses are slow and energy-intensive. In return, the data is retained even in a de-energised state.<\/p>\n\n At the server, the data of all assigned devices must be stored in a database. The more devices and data, the more resources (e.g. hard disk space for the database) are needed. In addition, the transmission of data on the uplink interface ties up resources. In mobile communications, this leads to costs depending on the SIM tariff. Depending on the selected technology, the corresponding<\/strong> uplink module in the device is used for communication. This includes mobile modem, WiFi module or similar. In the following, only the term modem<\/strong> will be used for the sake of simplicity.<\/p>\n\n For this mode, the modem is only switched on when needed<\/strong> at the time of transmission or synchronisation. The less frequently the transmission takes place and the less data is to be transmitted, the lower the energy consumption. Changed configurations are only adopted in the course of data synchronisation at the device.<\/p>\n\n The device automatically connects to the server and maintains thedata connection<\/strong> permanently<\/strong>. As soon as data is recorded, it is transmitted to the server. As soon as a configuration or control information is changed on the server, it is transmitted to the device. So the speed of reaction is the big advantage here.<\/p>\n\n This advantage is offset by the energy consumption as a disadvantage, as the modem in the device remains permanently switched on. <\/p>\n\n The modem is permanently switched on, but without a permanent data connection with the server. The device<\/strong> can bewoken up by the server<\/strong> and then automatically starts a synchronisation process. The energy consumption is higher than in INTERVAL mode, but lower than in ONLINE mode.<\/p>\n\n WAKEUP is technically realised via SMS. This mode can therefore only be used on devices with mobile phone uplink and SMS service – SIM and mobile phone provider. For modern mobile radio technologies, such as LTE-M, NB-IoT, it is currently very uncertain whether universal SMS support (all providers worldwide) will also be guaranteed in the future.<\/p>\n\n![\"\"](\"https:\/\/microtronics.com\/wp-content\/uploads\/2022\/01\/intervall-1024x683.jpg\")
<\/figure>\n\nModus INTERVAL \/ TRIGGERED<\/strong><\/strong><\/h2>\n\n
Modus ONLINE<\/strong><\/strong><\/h2>\n\n
Modus WAKEUP<\/h2>\n\n
Microtronics recommends…<\/strong><\/strong><\/h2>\n\n
![\"\"](\"https:\/\/microtronics.com\/wp-content\/uploads\/2022\/01\/connection-type-1024x410.png\")
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