-
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.
Most of the open source designs do not have protection on the TRRS connector. There are many kinds of protection that can be built such as for ESD (static electricity), over voltage, over current (short circuit), noise (interference), etc. All of these require components and board real estate. You can check out the Djinn Djinn keyboard It implements protection on the TRRS port and it is a BEAST. The Pro Micro form factor for MCU boards is pretty small so there is limited space for this kind of circuitry. However, if a keyboard has an onboard controller (no separate microcontroller) it might have some protection, at least on the USB connector.