Adapted and simplified from Franck Albinet's exercises available here. Also presented by NSRC at APRICOT 2018.
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While one of the primary purpose of IoT is to collect and exchange data over an inter-connected network, it is as well important to be able to persist information in the IoT device itself: log files of device's activity, Received Signal Strength Activity (RSSI), ... In the case of high-resolution measurements, it's useful to store them before sending them over the network, in order to save on power.
Learning outcomes
You will learn how to: access and operate device's file system; create and write a file in the flash folder; handle files safely using with statement; generate programmatically time stamped log file names; make your code robust and flexible with try ... except statement.
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