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CMS 515 Error on SIMCom SIM300 module

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GSM Man

GSM Man

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cms 515

There have been several post on this forum asking what causes the CMS 515 Error on SIMCom modules. These are the conditions for which this error will be returned:
Code: 
1. Sending a SMS when the SIM initialization is going on (after rebooting the module). 
2. Reading a SMS immediately after booting the module when SIM initialization is not yet over. 
3. Writing a SMS to the memory before SIM initialization is complete. 
4. Sending more than one SMS at a time or sending a SMS when the response (OK or ERROR) for a previously sent SMS has not been received.

PLEASE DON'T POST QUESTIONS TO THIS THREAD THAT ARE NOT RELATED TO THIS SUBJECT!
 

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