I work with SL6087 module and there are problems that I can’t solve. My distributor has not helped me yet, so I hope you’ll help me. The GSM network and the SIM card are detected successfully and the level of a signal is hight, but I can’t send SMS and make calls (but it works with another device - Q24PL).
If SIM card is not inserted, the module returns
+WIND: 3
+WIND: 0
+WIND: 7
and AT+CSQ returns a value about 18-20
+CSQ: 20,0
But when SIM card is inserted I get strange result - sometimes the network is lost and after 30 minutes I have following result
+WIND: 8
+WIND: 7
+WIND: 8
+WIND: 7
(so there are moments when the network is available (5-10 minutes) and moments when network is lost (1-5 minutes) )
and AT+CSQ returns variable results
AT+CSQ
+CSQ: 99,99
OK
AT+CSQ
+CSQ: 25,99
OK
AT+CSQ
+CSQ: 99,99
OK
AT+CSQ
+CSQ: 14,99
OK
AT+CSQ
+CSQ: 14,0
OK
And results of ATD and AT+CGMS commands are as follow
ATD89031577934;
+WIND: 5,1
OK
+WIND: 6,1
AT+CMGS=“89031577934”
Test…
ERROR
(it also works so with my country code +7 and I have tried all possible variants of syntax of these commands)