UM1695 datasheet(4/46 Pages) STMICROELECTRONICS

4 / 46 page

Overview

UM1695

4/46

DocID025531 Rev 5

Overview

The “AT full stack” command interface described in this user guide consists of a set of:



AT-style commands,



configuration variables,



status variables, and



asynchronous indications (also known as unsolicited responses or WINDs).

The communication of commands, variables, and asynchronous indications is executed via

the serial port and implies the integration of the SPWF01Sx modules with a host processor

as indicated in Figure 1.

Figure 1. SPWF01S integration with an host processor

Asynchronous indications may arrive at any time (except as noted below), and have the

format:

The <number> field of each asynchronous indication type is unique. The descriptive string

may be safely ignored.

Immediately after reset, no commands should be sent and only asynchronous indications

are present until the indication “<cr><lf>+WIND:0:Console active<cr><lf>” is received. After

WIND:0 is received, AT commands may be sent to the SPWF device.

AT commands are always in the form of:

AT<cmd><cr>

The AT command line, up to the terminating <cr>, is sent from the host. The (optional)

response lines followed by <cr><lf><responsecode><cr><lf> are sent from the module.

The <response code> is one of the following:

ERROR: <descriptive text>

The AT command handler allows for the AT commands to be entered in upper or lower

case.

UART

commands

Conf. Variables

Status Variables

Asynchronous Indications

Host

(STM32/STM8)

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