Connected sleep mode

XBee Cellular Modem hardware part number XBC-V1-UT-xxx can enter Connected sleep mode.

Only some hardware versions are compatible with this mode. To see if the module is capable of using connected sleep mode, read the HI (Hardware Identity) command. If the value returned is 3 then the hardware is compatible and connected sleep mode is available.

Set bit 0 of SO (Sleep Options) for connected sleep. When bit 0 is set and the XBee Cellular Modem goes to sleep, instead of the cellular component shutting down, it enters a lower power consumption mode that maintains registration with the cellular network. This allows significantly faster resumption of communications when coming out of sleep at the cost of additional power used.

Connected sleep mode draws 9 mA during sleep and 11 mA average over time, which includes periodically waking up to maintain connection.