RFD900x Data Sheet
www.rfdesign.com.au
6
Last update 09/07/2018
AT&R
Record default PPM stream for PPM output (vehicle side) (Not recommended.
Latency will vary with number of nodes and data traffic)
AT&T
Disables debugging report
AT&T=RSSI
Enables RSSI debugging report
AT&T=TDM
Enables TDM debugging report
AT&E=X
Set new encryption key (128-bit AES in 16 hex bytes e.g. 5A02D5BB...)
AT&E?
Shows current encryption key
ATPP
Shows GPIO configuration and state
ATPO=X
Sets GPIO X to output
ATPI=X
Sets GPIO X to input
ATPM=X
Sets input GPIO pin to mirror on remote radio (local GPIO must be set to input
and remote GPIO pin must be set to output)
ATPR=X
Shows GPIO input state
ATPC=X,S
Sets output GPIO X to state S
AT+F?
Show the forwarding table and forwarding buffer size, set MAX_DATA lower to get more
forwarding buffer
AT+Fx=?
Show element x of forwarding table
AT+Fx=Src,Dst
Set element x to forward from address Src to Address Dst
Table 3-1: AT Commands and their description
Table 3-2 shows more details about the parameters that can be set in the RFD900x modem.
Re
g #
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, 571 corresponding to 1200bps,
2400bps, 4800bps, 9600bps, 19200bps,
38400bps, 57600bps, 115200bps,
230400bps, 460800bps, 571428bps and
1000000 bps respectively.
115
1000
2
1
No
S2
AIR_SPEED
Air data rate in ‘one-byte form’. Accepted
values are 64,125,250,500,830
corresponding to 64000bps, 125000bps,
25000bps, 500000bps and 830000bps
respectively.
64
830
2
64
Yes
S3
MAX_DATA
Maximum size of packet data section
4068
4068
1
Yes
S4
MAX_RETRIES
Maximum number of retries
10
100
1
Yes
