Differences between revisions 13 and 14

GSM

GSM (Global System for Mobile Communications, originally Group Spécial Mobile), is a standard developed by the European Telecommunications Standards Institute (ETSI) to describe protocols for second generation (2G) digital cellular networks used by mobile phones.

AT command set for GSM Mobile Equipment

Adapted from

Command	Purpose
ATZ	Sets all parameters to their defaults
ATI	Requests manufacturer specific information
AT+GMI	Requests manufacturer identification
AT+GMM	Requests model identification
AT+GMR	Requests revision identification
AT+GSN	Requests serial number
AT+CPIN	Enter PIN
AT+CMGF	Message format to use
AT+CMGL	List messages
AT+CMGD	Delete message
AT+CLAC	List of supported AT commands

|| AT+CSQ || Signal strength ||

AT+COPS?

Current network operator

SMS PDU Encode Decode

http://twit88.com/home/utility/sms-pdu-encode-decode

Send SMS text mode

   1 picocom -b 9600 /dev/ttyUSB0
   2 atz
   3 ati
   4 at+cmgf=1
   5 at+cmgs="960000000"<enter>
   6 testSMS<ctrl+z>

Set GSM number in SIM card

   1 at+cpbs="ON"
   2 at+cpbw=1,"911234567",129,"GSM number"
   3 at+cnum #check number
   4

Set SMS message center

   1 at+csca="+351911616161",145 #Vodafone Portugal
   2 at+csca="+351962100000",145 #TMN
   3 at+csca? # check SMS message center
   4

AT+CSQ signal strength

Value	RSSI dBm	Condition
2	-109	Marginal
3	-107	Marginal
4	-105	Marginal
5	-103	Marginal
6	-101	Marginal
7	-99	Marginal
8	-97	Marginal
9	-95	Marginal
10	-93	OK
11	-91	OK
12	-89	OK
13	-87	OK
14	-85	OK
15	-83	Good
16	-81	Good
17	-79	Good
18	-77	Good
19	-75	Good
20	-73	Excellent
21	-71	Excellent
22	-69	Excellent
23	-67	Excellent
24	-65	Excellent
25	-63	Excellent
26	-61	Excellent
27	-59	Excellent
28	-57	Excellent
29	-55	Excellent
30	-53	Excellent

-  ⇤ ← Revision 13 as of 2026-02-21 17:39:41 → 
  Size: 2635
  Editor: vitor
  Comment:
+   ← Revision 14 as of 2026-02-21 17:41:03 → ⇥
  Size: 2669
  Editor: vitor
  Comment:
-Deletions are marked like this.
+Additions are marked like this.
 Line 28:
- * picocom -b 9600 /dev/ttyUSB0
 * atz
 * ati
 * at+cmgf=1
 * at+cmgs="960000000"<enter>
 * testSMS<ctrl+z>
+{{{#!highlight sh
picocom -b 9600 /dev/ttyUSB0
atz
ati
at+cmgf=1
at+cmgs="960000000"<enter>
testSMS<ctrl+z>
}}}
-Line 36:
+Line 38:
- * at+cpbs="ON"
 * at+cpbw=1,"911234567",129,"GSM number"
 * at+cnum #check number
+{{{#!highlight sh
at+cpbs="ON"
at+cpbw=1,"911234567",129,"GSM number"
at+cnum #check number
}}}
-Line 41:
+Line 45:
- * at+csca="+351911616161",145 #Vodafone Portugal
 * at+csca="+351962100000",145 #TMN
 * at+csca? # check SMS message center
+{{{#!highlight sh
at+csca="+351911616161",145 #Vodafone Portugal
at+csca="+351962100000",145 #TMN
at+csca? # check SMS message center
}}}