RFD TX Module User Manual
www.rfdesign.com.au
12
Version 1.0 Last update 07/03/2019
-
Using a Telnet compatible serial terminal programme such as putty
1
Notes:
1
This method is for advanced users and involves setting modem AT and RT commands via a remote terminal as such the exact method is
not included in this document.
When setting up the power level and the frequency band, please check the radiofrequency spectrum
plan in your area to operate in compliance with its legislation.
In order to avoid communication incompatibilities, it is important that both the TX Module modem
and the vehicle modem have the same firmware version and it is v2.55 or higher of the RFD SiK.
Uploading the firmware onto the TX Module modem is covered in this section; how to update the
firmware onto the vehicle modem, is covered in
section 3.3
and the modem datasheet in the useful
links of section xxxx
Table 3 - RFD900x parameters
Reg
#
S Register
Description
Default
Value
Maximum
Value
Minimum
Value
Must be the same
at both ends of
the link?
S0
FORMAT
This is for EEPROM version, it should not
be changed. It is set by the firmware
Firmware
dependant
N/A
N/A
No
S1
SERIAL_SPEED
Serial speed in ‘one
-
byte form’.
Accepted values are 1, 2, 4, 9, 19, 38, 57,
115, 230, 460 corresponding to 1200bps,
2400bps, 4800bps, 9600bps, 19200bps,
38400bps, 57600bps, 115200bps,
230400bps, 460800bps and 1000000bps
respectively.
57
1000
3
1
No
S2
AIR_SPEED
Air data rate in ‘one
-
byte form’.
Accepted values are 4,64,125,250,500,
750 corresponding to 4000bps,
64000bps, 125000bps, 25000bps,
500000bps and 750000bps respectively.
64
750
3
4
Yes
S3
NETID
Network ID. The same on both modems
in the pair
25
255
0
Yes
S4
TXPOWER
Transmit power in dBm. Maximum is
30dBm
30
30
0
No
S5
ECC
1
Enables or disables the Golay error
correcting code. When enabled, it
doubles the over-the-air data usage
0
1
0
Yes
S6
MAVLINK
2
Enables or disables the MAVLink framing
and reporting
1
1
0
No
S7
OP_RESEND
Opportunistic resend allows the node to
resend packets if it has spare bandwidth
0
1
0
No
S8
MIN_FREQ
915000
/868000
4
927000
/869000
4
902000
/868000
4
Yes
