SIM900 without SIM card ?

[antonius]

Dear Members,

Can I use SIM900 without SIM card for init code ?

Does it support 3G ?

Thanks

[Tesla DeLorean]

It won't allow for much of a network connection. You'll likely just get a registration denied status from AT CREG, and only be able to place emergency calls.

All the AT commands will continue to work, and return errors where network connectivity is required.

[antonius]

Can't I get IMEI ? or I need SIM card for it ?

Thanks

[antonius]

Here's the output :

SIM900 RTOS TEST BEGIN!
 
 
SIM 900 INIT SIM80x_INIT!
 
 
SIM 900 INIT DONE!
 
 
GET IMEI! 
 
 
 
 
Sim80x_GetIMEI() <--- OK
 
 
 
 
Sim80x_GetLoadVol() <--- ERROR
 
 
 
 
Sim80x_GetRingVol() <--- ERROR
 
 
 
 
 Sim80x_GetMicGain() <--- ERROR
 
 
 
 
 Sim80x_GetToneVol() <--- ERROR
 
 

Is my UART working properly already ?

The code :

static void SIM900_Thread1(void const *argument)
 
{
 
 Sim80x_Init(osPriorityLow);
 
   Sim80x_InitValue();
 
}

Thanks

[Tesla DeLorean]

The IMEI number belongs to the MODEM

>>Is my UART working properly already ?

I'd know this how? Perhaps show the characters you send to the modem, and those it responds back with?

[antonius]

This is the response, do you reckon, it's connected properly ?

SIM900 RTOS TEST BEGIN!
                                                       
SIM 900 INIT SIM80x_INIT!
                                                     
AT
 
                                                                            
O
                                                                              
 
                                                                               
 
                                                                               
 
 
                                                                              
 
                                                                              
 
                                                                               
 
 
                                                                              
 
                                                                              
 
                                                                               
 
 
                                                                              
 
 
                                                                              
T
                                                                              
 
                                                                               
T
                                                                              
 
                                                                               
 
                                                                               
OO
                                                                             
SIM 900 INIT DONE!
                                                            
 
 
                                                                              
 
KKEE
                                                                         
 
                                                                               
 
                                                                               
 
 
                                                                              
00
                                                                             
 
                                                                               
11
                                                                             
 
                                                                               
 
                                                                              
GET IMEI! 
                                                                    
 
                                                                               
K
                                                                             
Sim80x_GetIMEI() <--- OK
                                                      
 
 
                                                                              
11
                                                                             
 
                                                                               
55
 
                                                                           
                                                                                
Sim80x_GetLoadVol() <--- ERROR
                                                
 
                                                                               
K
                                                                             
Sim80x_GetRingVol() <--- ERROR
                                                
K
 
                                                                            
                                                                                
 Sim80x_GetMicGain() <--- ERROR
                                               
 
                                                                               
,
                                                                             
 Sim80x_GetToneVol() <--- ERROR
                                               
,K           

I put baudrate at 19200 and it's SIM900 for arduino uno shield,

Anyone else have an experiences?