We have expanded the set of characters that can be used when sending SMS messages to devices from the Soracom User Console or using the Soracom API/CLI.

Previously, when specifying GSM-7 (GSM 7-bit default alphabet) encoding, SMS messages only supported characters in the GSM-7 Basic Character Set. With this update, SMS messages can now include additional characters such as {, }, [, ], |, ^, and ~. The full list of supported characters is shown in the two tables below.

GSM-7 Encoding Basic Character Set

These are standard characters that are transmitted using 7 bits per character.

	0x0_	0x1_	0x2_	0x3_	0x4_	0x5_	0x6_	0x7_
0x_0	@	Δ	SP	0	¡	P	¿	p
0x_1	£	_	!	1	A	Q	a	q
0x_2	$	Φ	"	2	B	R	b	r
0x_3	¥	Γ	#	3	C	S	c	s
0x_4	è	Λ	¤	4	D	T	d	t
0x_5	é	Ω	%	5	E	U	e	u
0x_6	ù	Π	&	6	F	V	f	v
0x_7	ì	Ψ	'	7	G	W	g	w
0x_8	ò	Σ	(	8	H	X	h	x
0x_9	Ç	Θ	)	9	I	Y	i	y
0x_A	LF	Ξ	*	:	J	Z	j	z
0x_B	Ø		+	;	K	Ä	k	ä
0x_C	ø	Æ	,	<	L	Ö	l	ö
0x_D	CR	æ	-	=	M	Ñ	m	ñ
0x_E	Å	ß	.	>	N	Ü	n	ü
0x_F	å	É	/	?	O	§	o	à

LF, CR, and SP represent the following control characters (with their Unicode code points):

• LF: Line Feed (U+000A)
• CR: Carriage Return (U+000D)
• SP: Space (U+0020)

GSM-7 Encoding Basic Character Set Extension

Note that these characters are sent using 14 bits per character (escape sequence 0x1B + extended character).

	0x0_	0x1_	0x2_	0x3_	0x4_	0x5_	0x6_	0x7_
0x_0					|
0x_1
0x_2
0x_3
0x_4		^
0x_5							€
0x_6
0x_7
0x_8			{
0x_9			}
0x_A	FF
0x_B
0x_C				[
0x_D				~
0x_E				]
0x_F			\

• FF represents the form feed character (U+21A1).

Please note that the interpretation and display of these characters on the device receiving the SMS message may vary depending on the device's implementation.

If you need to send characters that are not listed in the tables, consider using UCS-2 encoding.