All bessa products use the same proprietary dispenser driver for Android. It unifies multiple dispenser protocols and allows uniform booking regardless of the dispenser system.
Supported protocols
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E Protocol (P160 / WTS from version 1.103 of 2021-05-16 onwards) — connection via USB / serial
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VMPS — connection via serial (USB) or network (UDP, default port 28001)
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Z1U-LAN BUÖ (API version 1.0.2) — connection via LAN (TCP 443, no ICMP/PING support)
For a full overview of all network and port requirements for dispenser systems, printers, payment terminals, and the other bessa components, see Network security & port requirements.