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arduino-canbus-monitor
Can bus monitoring tool based on arduino and can bus shield. Implements CAN ASCII/SLCAN protocol compatible with Lawicel CAN232/CANUSB. Can be used for monitoring low speed CAN (interior can bus of most cars, less than 500kbps). For higher speeds serial port can become a bottleneck in case data density is high.
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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
You can use something like https://github.com/latonita/arduino-canbus-monitor to use a CAN shield with can-utils (it's faking a SLCAN implementation). Try software like SavvyCAN, they help with starting out (since it provides a GUI and some nice tools)