Reference Manual

Table Of Contents
5.1 State indication using the LED pins
The pins LED_1 and LED_2 of the Proteus-III can be used to determine the module state.
The states described in Figure
7
result in the following pin behavior. The pins on the Proteus-
III are active high.
State LED_1 LED_2
ACTION_IDLE
Blinking (On for 200ms, Off for
2800ms)
Off
ACTION_SCANNING
Blinking (On for 1000ms, Off for
1000ms)
Off
ACTION_CONNECTED
On
Off, On (as soon as the channel
was opened successfully, see
CMD_CHANNELOPEN_RSP
)
ACTION_SLEEP
Off Off
ACTION_DTM
Off Off
BOOTLOADER
waiting for
connection
On Off
BOOTLOADER
connected,
firmware update running
Off On
Table 9: LED behavior of the Proteus-III
5.2 Sleep mode
Especially for battery-powered devices the
ACTION_SLEEP
mode (system-off mode) supports
very low power consumption (<1µA). It can be entered by sending the command
CMD_SLEEP_
REQ
to the module. If allowed (due to the current operating state) the module will then send
a
CMD_SLEEP_CNF
and then enter the
ACTION_SLEEP
mode.
In
ACTION_SLEEP
mode the UART is disabled, so the module will not receive or transmit any
data. To prevent leakage current, the host shall not pull the URXD to LOW level (as the
module has an internal pull-up resistor enabled on this pin).
To leave the
ACTION_SLEEP
mode and enter
ACTION_IDLE
state again, the module has to be
woken up by applying a low signal to the WAKE_UP pin for at least 5ms before releasing the
signal back to high. The module then restarts completely, so that all volatile settings are set
to default. A
CMD_GETSTATE_CNF
will be send when the module is ready for operation.
Please note that the WAKE_UP pin has a second function. If the mod-
ule is not in
ACTION_SLEEP
mode and the UART was disabled using the
CMD_UARTDISABLE_REQ
, the UART can be re-enabled by applying falling edge,
holding the line low for at least 10ms before applying a rising edge and
holding it high for at least 10ms. In this case the module answers with a
CMD_UARTENABLE_IND
message.
Proteus-III reference manual version 0.11 © November 2019
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