Q2687G R743 (OS 6.32) died for many trash data comming from UART
Q2687G with R743, then download any OAT application built by GCC (M2M 1.1.2)
then, run the application, the application set OS to V24 AT command mode (not data mode)
now send 1KB or more trash text to AT command port by hardware UART (not software)
then the module died: the UART cannot receive any AT command or data
for example, connect the module to PC, download a HELLO WORLD application to the module, then start the application by AT+WOPEN=1, after that use a COM port tool (AccessPort , etc) to send 1KB text data (eg, “AAA…AA” 1000 bytes) each one second, then wait some minutes (2~3 mins), then stop sending data, now the module can not accept any AT command! (send AT, but the module has no response)
this problem found in Q2687G (R743), while Q2687H and Q26Ex have no problem
and change firmware bad to R70, everything goes fine, what happend?