Pycom FiPy, Руководство пользователя, Страница: 409 / 496

The datasheet of the SiPy is available as a PDF File .
Notes
WiFi
By default, upon boot the SiPy will create a WiFi access point with the SSID
sipy-wlan-XXXX
, where
XXXX
is a random 4-digit number, and the password
www.pycom.io
.
Power
The
Vin
pin on the SiPy can be supplied with a voltage ranging from
3.5v
to
5.5v
. The
3.3v
pin on the other hand is output only , and must not be used to feed power into the
SiPy, otherwise the on-board regulator will be damaged.
Deep Sleep
Due to a couple issues with the SiPy design the module draws more current than it should
while in deep sleep. The DC-DC switching regulator always stays in high performance mode
which is used to provide the lowest possible output ripple when the modules is in use. In this
mode, it draws a quiescent current of 10mA. When the regulator is put into ECO mode, the
quiescent current goes down to 10uA. Unfortunately, the pin used to control this mode is out
of the RTC domain, and therefore not usable during deep sleep. This causes the regulator to
always stay in PWM mode, keeping its quiescent current at 10mA. Alongside this the flash
chip doesn't enter power down mode because the CS pin is floating during deep sleep. This
causes the flash chip to consume around 2mA of current. To work around this issue a "deep
sleep shield" is available that attaches to the module and allows power to be cut off from the
device. The device can then be re-enabled either on a timer or via pin interrupt. With the
deep sleep shield the current consumption during deep sleep is between 7uA and 10uA
depending on the wake sources configured.
Tutorials
Tutorials on how to the SiPy module can be found in the examples section of this
documentation. The following tutorials might be of specific interest for the SiPy:
WiFi connection
Sigfox
6.1.5 SiPy
409