AX−SFJK, AX−SFJK−API

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11

which in this example contains { 0xAA : 0xBB : 0xCC :

0xDD }.

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

Name

Description

AT

Dummy Command

Just returns ‘OK’ and does nothing else. Can be used to check

communication.

AT$SB=bit[,bit]

Send Bit

Send a bit status (0 or 1). Optional bit flag indicates if AX−SFJK

should receive a downlink frame.

AT$SF=frame[,bit]

Send Frame

Send payload data, 1 to 12 bytes. Optional bit flag indicates if

AX−SFJK should receive a downlink frame.

AT$SO

Manually send out of band

message

Send the out−of−band message.

AT$TR?

Get the transmit repeat

Returns the number of transmit repeats. Default: 2

AT$TR=?

Get transmit repeat range

Returns the allowed range of transmit repeats.

AT$TR=uint

Set transmit repeat

Sets the transmit repeat, sets only for transmit with downlink frame.

ATSuint?

Get Register

Query a specific configuration register’s value. See the table

“Registers” for a list of registers.

ATSuint=uint

Set Register

Change a configuration register.

ATSuint=?

Get Register Range

Returns the range of allowed register values.

AT$IF=uint

Set TX Frequency

Set the output carrier macro channel for Sigfox frames.

AT$IF?

Get TX Frequency

Get the currently chosen TX frequency.

AT$DR=uint

Set RX Frequency

Set the reception carrier macro channel for Sigfox frames.

AT$DR?

Get RX Frequency

Get the currently chosen RX frequency.

AT$CW=uint,bit[,uint_opt]

Continuous Wave

To run emission tests for Sigfox certification it is necessary to send

a continuous wave, i.e. just the base frequency without any

modulation. Parameters:

Name

Range

Description

Frequency

800000000−

Continuous wave frequency in Hz.

999999999, 0 Use 923200000 for Sigfox or 0 to

keep previous frequency.

Mode

0, 1

Enable or disable carrier wave.

Power

14

dBm of signal | Default: 14

AT$CB=uint_opt,bit

Test Mode: TX constant byte

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

Description

Pattern

0−255, −1

Byte to send. Use ‘−1’ for a

(pseudo−)random pattern.

Mode

0, 1

Enable or disable pattern test mode.

AT$T?

Get Temperature

Celsius.

AT$V?

Get Voltages

Return current voltage and voltage measured during the last

transmission in mV.