The “Geysitech (Bayern-Hessen) Protocol” ( “Geysitech Protokoll” / “Bayern-Hessen Datenprotokoll” ) for climate telemetry systems, used by the IT infrastructure of the german trade and industrial inspectorates ( “Gewerbeaufsichtsamt” ) in Germany.
Data processing systems of Thermo Scientific are known to support this protocol!
No bus, but a P2P network. You can change an IO-Link sensor device easily, as the configuration parameters are not stored on the device, but on the IO-Link controller.
Profibus PA - network topologies “ring”, “star”, “line”, “bus”. Power supply of devices by the network cable. It is quiet EMC / EMV safe. Option “ProfiSAFE” ( EN.Wikipedia "PROFIsafe", DE.Wikipedia "PROFIsafe" ) for use with safety controls.
Profibus DP - just bus topology “line”, no power over line.
HW group "HWg-PWR: M-Bus IP energy meter (SNMP, WEB)" - “M-Bus or S0 pulse counter? The M-Bus is a standard in energy metering. As opposed to pulse counters (S0), it works with absolute values (acquired data can be used as an argument against the utility bill). At the same time allows working with additional values (quantities), such as voltage, current, flow, drift, etc.”.
NettedAutomation GmbH - “The Net is the Automation. We bring people, systems and devices together” - “IEC61850Li® - Lite implementations. The free evaluation DLL for an IEC 61850 (IEC 61400-25) as a Starter Kit for Client/Server and Publisher/Subscriber is now available”.
SISCO, Inc "MMS-EASE Lite" - “A source code product for embedding the IEC 61850 protocols in Intelligent Electronic Devices (IEDs) such as RTUs, reclosers, PLCs, meters and other resource constrained systems”.
Standad UARTs of microcontrollers are not suitable for implementation of PROFIBUS, MODBUS or other high-speed serial communication ( as a standard UART can't be configured to run with 12 Mhz bus clock speed ). You need specially designed devices ( on the microcontroller chip ) for such.