GW-WIFI-01
User_Guide_GW -WIFI-01_180511
Page 4
Hardware
Main components are: 32b microcontroller, WiFi module, EEPROM memory, serial Flash memory, SD memory card, IQRF
transceiver module with antenna and RTCC.
Power supply
GW-WIFI-01 should be supplied via standard micro USB connector by external stabilized 5 V DC, e.g. from the power source
delivered with the GW or from USB interface. The accumulator is shared for RTCC as well as other circuitry. It is intended
for backup supply only.
Power modes
On
Operational mode. The GW is fully functional. If external power supply is connected, the accumulator is charged
(until being full). If external power supply is not connected, the GW is supplied from the accumulator. Complete GW
initialization is performed when switching to On mode (either from Off or Sleep).
Sleep
Power saving mode. It is only available if external power supply is connected. TR as well as WiFi modules are
disabled, no communication is possible. The accumulator is charged (until being full).
Off
It is only available if external power supply is disconnected. Except of RTCC, all other circuitry is disconnected from
power supply and all other functionality is disabled. RTCC keeps running, powered from the accumulator. The
accumulator is not charged.
Switching over to another mode can be controlled by the
Control
pushbutton. See chapter
Pushbuttons
. Additionally, the GW
is switched Off automatically if accumulator voltage drops below 3.2 V (when supplied from the accumulator in On mode) or
if external power is disconnected in Sleep mode.