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SUMD and SUMDV3

Whether SUMD or SUMDV3 is used depends on the version of the transmitter/receiver and the firmware of the receiver.

  • SUMD: Works similarly to IBUS, SBUS, EX-Bus, and CPPM (see above).
  • SUMDV3: Transmits a field of so-called "digital switches," which are received and stored by RCMultiBus modules. Both channel-specific switches (as with IBUS, SBUS, EX-Bus, CPPM) and SUMDV3-specific digital switches can be used here.