Master/plc-connector: Reads data from PLCs of different vendors, processes it and saves it to different kinds of databases

jm-hsa 51f8668414 init		2 lat temu
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balluff	51f8668414 init	2 lat temu
rockwell	51f8668414 init	2 lat temu
siemens	51f8668414 init	2 lat temu
common.py	51f8668414 init	2 lat temu
dummy.py	51f8668414 init	2 lat temu
replay_influxdb.py	51f8668414 init	2 lat temu