EnOcean PTM 535BZ, Руководство пользователя

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USER MANUAL PREVIEW
PTM 535BZ – BLUETOOTH AND ZIGBEE GREEN POWER PUSHBUTTON TRANSMITTER
© 2021 EnOcean | www.enocean.com F-710-017, V1.0 PTM 535BZ User Manual | v1.0 | May 2021 | Page 102/112
B.1.3 Scan interval
The scan interval has to be selected such that the receiver will not be inactive so long that it
misses all three advertising events.
The longest period for which the receiver can be inactive is given by the time between the
end of the first advertising events (assuming that the receiver exactly misses the last bit of
it) and the beginning of the third advertising event (so that this will certainly be received).
Figure 58 illustrates this.
Scan Interval
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Figure 58
– Scan interval setting
From Figure 58 above, it can be seen that the maximum duration of the scan interval is
dependent on the advertising interval:
◼
If PTM 535BZ uses 20 ms advertising intervals, then the scan interval has to be less
than the time between the end of the first advertising event and the begin of the
third advertising event (2 * 20 ms = 40 ms) minus 0.5 ms (telegram duration) mi-
nus a timing margin to account for the random time offset at the transmitter.
Using a scan interval of no more than 37 ms is recommended for this case.
◼
If PTM 535BZ uses 10 ms advertising intervals, then the scan interval has to be less
than the time between the end of the first advertising event and the begin of the
third advertising event (2 * 10 ms = 20 ms) minus 0.5 ms (telegram duration) mi-
nus a timing margin to account for the random time offset at the transmitter.
Using a scan interval of no more than 17 ms is recommended for this case.
B.1.4 Summary
Table 33 below summarizes the recommended receiver scan settings.
PTM 535BZ
Advertising Interval
Receiver Scan Window
(Minimum)
Receiver Scan Interval
(Maximum)
20 ms 23 ms 37 ms
10 ms 13 ms 17 ms
Table 33 – Recommended receiver scan settings