1577836800 to
2147483647
(2020-01-01 00:00:00 to
2038-01-19 03:14:07)
The message will be considered expired if not sent before the
specified time. If the specified time is greater than
1577836800 and less than or equal to the current UTC time,
the message will not be queued and an expired message $TD
ERR,HOLDTIMEEXPIRED,<msg_id>*xx will be returned
immediately.
<string|data> may be expressed one of two different ways. If all the data to be sent is in the
ASCII character range from 0x20 (space) to 0x7e (tilde), then the data may be sent as a string.
A string is specified by enclosing the data in double quotes, e.g., "Hello, world". It is permissible
for the string to contain double quotes within the string, e.g., "Today is a "new" day". If the data
to be sent includes one or more character outside the 0x20 to 0x7e range, then it must be
specified as pairs of hex characters ('0'..'9', 'A'..'F', 'a'..'f'), and must be a multiple of 2. Sending
'Hello' as hex would be 48656C6C6F. Illegal characters or an odd number of characters will
cause a BADDATA message to be returned.
<msg_id> is assigned by the device, and is an unsigned 64-bit value comprised of the device
ID, a day of year counter, and a message of day counter. Responses that have a 0 as the
message ID indicate the message has not been placed in the queue and therefore has no ID.
The value should be treated as a simple arbitrary number.
November 2021 Swarm M138 Modem Manual - Rev 1.00 74/77
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