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CPU RESET, V535 (LTE NOSLEEP)

CPU (central processor unit) Power-on message with the firmware version number (535) and options (LTE

NOSLEEP). Possible options are

LTE -

NOSLEEP - Digi module never goes to sleep

Wait for power up...

The CPU is waiting for the LTE module to acknowledge that it has powered up. A response is sent only if the

module was previously powered down or reset.

No response

No response was seen from the module after the maximum wait time (which may vary).

CTS HI OR OPEN

The Clear-To-Send line is high (not asserted) and so the LTE module is present and working or the mod-

ule is removed from the board.

Wake up...

The CPU is waking up the LTE module

SLEEP_RQ LO

The CPU is commanding the LTE module to wake up

CTS LO (OK)

The Clear-To-Send line is asserted which means the module is present and working

Wait 2 min for LTE connect...

The CPU is waiting up to 2 minutes for status == 2 (cell tower connect)

Got M status = 2

The cell connection is good

Got M status = 14

The LTE data network is good

+++

The CPU is commanding the LTE module into AT (transparent) mode for some commands

The CPU received an OK response

Appendix: SAPIP-Cell-LTE Message Explanations

4G LTE network