Sep 17, 2015 #1 A aleynasarcanli Newbie level 2 Joined Sep 17, 2015 Messages 2 Helped 0 Reputation 0 Reaction score 0 Trophy points 1 Activity points 14 I made everything, led is blinking its true, but when I send "AT" nothing response, What is the default baud rate of simcom sim900 ? strange response when start with powerkey.. for example "IIIIÿþÿþ"
I made everything, led is blinking its true, but when I send "AT" nothing response, What is the default baud rate of simcom sim900 ? strange response when start with powerkey.. for example "IIIIÿþÿþ"
Sep 17, 2015 #2 H hobbyckts Advanced Member level 1 Joined Mar 12, 2015 Messages 480 Helped 88 Reputation 176 Reaction score 85 Trophy points 28 Activity points 2,457 Default baud rate will be 9600.. How you have done your interface? The response which you are getting is some kind of junk...
Default baud rate will be 9600.. How you have done your interface? The response which you are getting is some kind of junk...
Sep 17, 2015 #3 A aleynasarcanli Newbie level 2 Joined Sep 17, 2015 Messages 2 Helped 0 Reputation 0 Reaction score 0 Trophy points 1 Activity points 14 Breadboard connections below. 3.6 v 3A powered breadboard.
Sep 17, 2015 #4 H hobbyckts Advanced Member level 1 Joined Mar 12, 2015 Messages 480 Helped 88 Reputation 176 Reaction score 85 Trophy points 28 Activity points 2,457 Expected some schematic from you... But your picture gives a fair idea about it. So the interface between the GSM and the PC is through FT232 (UART-USB)? Power supply Range which you range? (both voltage and current required) I couldn't able to locate the SIM card slot in your picture. What are all the signals which you have chosen from GSM.
Expected some schematic from you... But your picture gives a fair idea about it. So the interface between the GSM and the PC is through FT232 (UART-USB)? Power supply Range which you range? (both voltage and current required) I couldn't able to locate the SIM card slot in your picture. What are all the signals which you have chosen from GSM.
Sep 17, 2015 #5 FvM Super Moderator Staff member Joined Jan 22, 2008 Messages 52,483 Helped 14,756 Reputation 29,794 Reaction score 14,121 Trophy points 1,393 Location Bochum, Germany Activity points 298,354 Default baud rate will be 9600.. Click to expand... Default setting is AT+IPR=0 (autobaud). Default baudrate is nevertheless 115200, read the SIM900 AT manual. It's also said that module is sending a few bytes at 115200 during startup.
Default baud rate will be 9600.. Click to expand... Default setting is AT+IPR=0 (autobaud). Default baudrate is nevertheless 115200, read the SIM900 AT manual. It's also said that module is sending a few bytes at 115200 during startup.