HopNet RS-232 Serial ModBus Radio
Protocol Commands
These commands can be used to tune the transceiver for optimum transmission of
data across the RF link. For most applications, the default values are adequate.
Command
Description
pe[?|0-9]
Set Alternative Frequency Band
0 = FCC/ETSI operation. (~2401 – 2471MHz) (default)
1 = ~2448 – 2473MHz Avoids 11b channels 1 – 6 & 14
2 = ~2448 – 2473MHz Avoids 11b channels 1 – 6 & 14
3 = ~2473 – 2495MHz Avoids 11b channels 1 - 10
4 = ~2452 – 2478MHz Avoids 11b channels 1 – 6 & 14
5 = ~2401 – 2425MHz Avoids 11b channels 6 – 14
6 = ~2409 – 2435MHz Avoids 11b channels 8 – 14
7 = ~2419 – 2445MHz Avoids 11b channels 1 & 10 – 14
8 = ~2430 – 2455MHz Avoids 11b channels 1,2 & 12 – 14
9 = ~2440 – 2465MHz Avoids 11b channels 1 – 4 & 14
ph[?|00-fe]
(base only)
Set Hop Duration
90H = default (=10ms)
pk[?|00-d0]
Set Minimum Data Length
01 = default
pl?
Get Maximum Data Length
D4H = default (=212 bytes)
pn[?|01-3e]
(base only)
Set Maximum Number of Remotes
3EH = default (=62 remotes)
pr[?|00-ff]
Set Packet Attempts Limit
10H = default
FFH = Infinite retry
(RF flow control point-to-point only)
pt[?|00-ff]
Set Data Transmit Delay
00H = default
pv[?|0|1]
(base only)
Set Slot Assignment Mode
0 = default (dynamic slot assignment)
1 = static slot assignment
pw[?|00-34]
(base only)
Set Base Slot Size
08H = default (=32 bytes)
px[?|0|1]
Set ARQ mode.
0 = ARQ enabled (default)
1 = ARQ disabled (redundant transmission)
NOTE: Incorrect setting of these parameters may result in reduced throughput or loss
of data packets.
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2000- 2004 Cirronet
™
Inc
41
M-2410-0022 Rev B
