I recently counter some problem with my application. I have build application using M1306 with X51, and for reading sms Iâ€™m using AT+CMGR. On X51 when some one reading at wrong indexes the modem give respond +CMS ERROR: 321, and my application make some procedure with the respond value. But when Iâ€™m using new modem with X55 it makes error because the modem didnâ€™t give the error value +CMS ERROR: 321, it just give respond OK.
My question is can we make the modem to give error message? And how to do that?