USER MANUAL
PTM 216B – BLUETOOTH
®
PUSHBUTTON TRANSMITTER MODULE
© 2022 EnOcean | www.enocean.com
F-710-017, V1.0
PTM 216B User Manual | v1.0 | February 2022 | Page 20/86
Security
Signature
(4
byte)
The Security Signature is used to authenticate PTM 216B radio telegrams as de-
scribed in chapter 4.6.3
Figure 14 below illustrates the data telegram payload.
Figure 14 – Data telegram payload structure
4.6.2
Button action encoding
The
Switch Status
field within the data telegram payload identifies the PTM 216B button
action (button push or release). PTM 216B uses the following sequence to identify and
transmit button contact status:
1.
Determine direction of the energy bar movement (Push Action or Release Action)
2.
Read input status of all button contacts
3.
Calculate data payload
4.
Calculate security signature
In PTM 216B, the type of action (Press Action or Release Action) is indicated by Bit 0 (Ener-
gy Bar). If a button contact has been actuated during Press Action or Release Action, then
this is indicated by the according status bit set to ‘
1
’.
Note that all contacts that were pressed during Press Action will be released during Release
Action. The case of continuing to hold one (or several) button contacts during Release Ac-
tion is mechanically not possible.
The button action encoding used by PTM 216B is shown Figure 15 in below.
Figure 15 - PTM 216B button action encoding
