Digi XBee 3

SMS behaviors
SMS encoding
The XBee Smart Modem transmits SMS messages using the standard GSM 03.38 character set.
1
Because this character set only provides 7 bits of space per character, the XBee Smart Modem
ignores the most significant bit of each octet in an SMS transmission payload.
The device converts incoming SMS messages to ASCII. Characters that cannot be represented in
ASCIIare replaced with a space (' ', or 0x20 in hex). This includes emoji and other special characters.
1
Also referred to as the GSM 7-bit alphabet.
Digi XBee® 3 Cellular LTE Cat 1 AT&T Smart Modem User Guide
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