![]() I also use AT+SIDET=0,0 to increase the chance but it didn’t work. It can detect all DTMF code except +DTMF:4 and +DTMF:5!!! When i enable the the DTMF detection by using AT+DDET=1 the module didn’t detect DTMF code 4,5 in case of with old version it worked correctly!!! The problem solved and the module didn’t reset but i found new problem. ![]() ![]() ![]() I upgraded the firmware to 1137B06SIM900M64_ST_ENHANCE version. Hi dear brother I’m using SIM900 for 4years in a math product(over 5000module) with firmware version: 1137B08SIM900M64_ST_DTMF_JD_MMS but i founded new problem: the module reset when it received an unsolicited code(+CMT.)!!! At fisrt i tried to discard it by using AT+CNMI=1,0,0,0,0 command but the problem didn’t solved. Simcom Flash Update Tool V1 10 Average ratng: 4,1/5 1662votes
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