User guide

sending it AT<cr> until it responds with an OK response. Post v2.7.0 it is safe to
communicate after receiving an OK.
The optional parameter <n> is only available for firmware 2.7.0 and newer and is a value
in the range 0 to 7 (up to version 7.18.0). Post 9.18.6 valid values are 0 to 4 inclusive.
ATZ and ATZ0 signify reset and emerge into the current mode (see command ATI14).
ATZ1 to ATZ4 instructs the module to reset and then emerge into the appropriate boot
mode. Note that S Reg 103 specifies the boot mode from cold.
For firmware prior to v2.7.0
Response: <cr,lf>OK<cr,lf> note OK is returned before the RESET
For firmware v2.7.0 and newer
Response: <cr,lf>OK<cr,lf> and OK is returned after the RESET
2.2.18 AT&Fn {Set S Register Defaults}
This command will only work when the device is in local command and unconnected mode.
Depending on the value of ‘n’ it installs S Register values appropriate for various power
modes, ranging from minimum power consumption to maximum.
Legal values of ‘n’ are as per the following table. All other values of n will generate a
syntax error response. If ‘n’ is not specified then a default value of 0 is assumed where the
baud rate is NOT changed.
&F0
(Default)
Medium power consumption, UART baud rate unchanged, Left LED off,
Right LED = DCD
&F1 Minimum power consumption, UART baud rate set to 9600, Left and Right
LED off
&F2 Minimum power consumption, UART baud rate set to 38400, Left and Right
LED off
&F3 Minimum power consumption, UART baud rate set to 115200, Left and
Right LED off
&F4 Medium power consumption, UART baud rate set to 115200, Left LED off,
Right LED = DCD
&F5 Maximum power consumption, UART baud rate set to 115200,
Left LED=DSR, Right LED = DCD
&F6 Maximum power consumption, UART baud rate set to 115200,
Left LED=DSR, Right LED = DCD
Explicitly set higher baud rates using ATS521=n
Please refer to the “Power Consumption” chapter in the relevant EZURiO device user guide,
for more detailed information of power usage.
The new values are NOT updated in non-volatile memory until the AT&W command is sent
to the EZURiO device.
Response: <cr,lf>OK<cr,lf>
Or
Response: <cr,lf>ERROR nn<cr,lf>
2.2.19 AT&F* {Clear Non-volatile Memory}
The AT&F* variant of the command installs values in S registers as per command AT&F4
and then all other user parameters in non-volatile memory are erased. This means that the
trusted device database is cleared, and so are parameters related to the following
commands:- AT+BTR, AT+BTN, AT+BTS.
Response: <cr,lf>OK<cr,lf>
Or
Response: <cr,lf>ERROR nn<cr,lf>
DSH_50003_v1v3 AT Command Reference 17 of 33