AX-SFUS Datasheet, PDF (12/20 Pages) ON Semiconductor – Ultra-Low Power

AX−SFUS, AX−SFUS−API
AT$CB=0011223344,1
OK
RX=AA BB CC DD
This sends a Sigfox frame containing { 0xAA : 0xBB : 0x12
: 0x34 } without waiting for a response telegram.
AT$CB=0xAA,1
OK
The ‘CB’ command sends out a continuous pattern of bits,
in this case 0xAA = 0b10101010.
AT$P=1
OK
This transitions the device into sleep mode. Out−of−band
transmissions will still be triggered. The UART is powered
down. The device can be woken up by a low level on the
UART signal, i.e. by sending break.
Table 10. COMMANDS
Command
AT
AT$SB=bit[,bit]
AT$SF=frame[,bit]
AT$SO
AT$TR?
AT$TR=?
AT$TR=uint
ATSuint?
ATSuint=uint
ATSuint=?
AT$IF=uint
AT$IF?
AT$DR=uint
AT$DR?
AT$CW=uint,bit[,uint_opt]
AT$CB=uint_opt,bit
AT$RC
AT$T?
Name
Dummy Command
Send Bit
Send Frame
Manually send out of band
message
Get the transmit repeat
Get transmit range
Get transmit repeat
Get Register
Set Register
Get Register Range
Set TX Frequency
Get TX Frequency
Set RX Frequency
Get RX Frequency
Continuous Wave
Test Mode: TX constant byte
Reset FCC Macrochannel
Get Temperature
Description
Just returns ‘OK’ and does nothing else. Can be used to check
communication.
Send a bit status (0 or 1). Optional bit flag indicates if AX−SFUS
should receive a downlink frame.
Send payload data, 1 to 12 bytes. Optional bit flag indicates if
AX−SFUS should receive a downlink frame.
Send the out−of−band message.
Returns the number of transmit repeats. Default: 2
Returns the allowed range of transmit repeats.
Sets the transmit repeat.
Query a specific configuration register’s value. See chapter
“Registers” for a list of registers.
Change a configuration register.
Returns the allowed range of transmit repeats.
Set the output carrier macro channel for Sigfox frames.
Get the currently chosen TX frequency.
Set the reception carrier macro channel for Sigfox frames.
Get the currently chosen RX frequency.
To run emission tests for Sigfox certification it is necessary to send a
continuous wave, i.e. just the base frequency without any modula-
tion. Parameters:
Name
Range
Description
Frequency
800000000− Continuous wave frequency in Hz.
999999999, 0 Use 902200000 for Sigfox or 0 to
keep previous frequency.
Mode
0, 1
Enable or disable carrier wave.
Power
24
dBm of signal | Default: 24
For emission testing it is useful to send a specific bit pattern. The
first parameter specifies the byte to send. Use ‘−1’ for a
(pseudo−)random pattern. Parameters:
Name
Range
Decsription
Pattern
0−255, −1
Byte to send. Use ‘−1’ for a
(pseudo−)random pattern.
Mode
0, 1
Enable or disable pattern test mode.
This command resets the FCC Macrochannel. Subsequent transmit
operations (AT$SO, AT$SB, AT$SF) may pause up to 20 s to ensure
FCC compliance
Measure internal temperature and return it in 1/10^th of a degree
Celsius.
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