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I tried to send AT+CPIN and AT+CGID and I receive ERROR. I connected SIM_Data, SIM_Clk and SIM_Rst through resistor 27Ohm to holder SIM CARD. To SIM_Vdd is connected capacitor 200nF. What I do wrong?
I get also +CREG: 0,1. Netlight is blinking slow one time for 3 seconds.
Hi,
For SIM card detection problems kindly check 220nf capacitor on SIM_VDD and ground. RST, CLK, I/O should be connected with an 22 ohms resistor in series.
Try to place your SIM card as close as possible to Modem connector, ESD protection is always suggested for long run applications. During PCB design routing should be done as per guide lines to avoid cross talk.
Please somebody help me to call from sim300 v7.03 or pickup a incoming call and end active call.
I can succesfully send sms but unable to receive a call
there is a specific at command for each function in sim300
to make a call ull write
atd+92333xxxxxxx;
try doing it with and without semicolon
bdw how ru trying to make call or send sms thru microcontroller or directly from hyper terminal?
Now i can make calls or receive calls also send sms, But CAN SOMEBODY PLEASE HELP ME To PURCHASE SIM300 EVB I'm in India at Maharashtra.
I want to flash SIM300 ...............
Now i can make calls or receive calls also send sms, But CAN SOMEBODY PLEASE HELP ME To PURCHASE SIM300 EVB I'm in India at Maharashtra.
I want to flash SIM300 ...............
With PortAudio and gsmlib (for SMS binary PDU decoding), compiled as C++ module (requires C++ runtime, C++ libraries, etc). This build uses libspeexdsp to cancel the sidetone produced by cellphones used as physical interface, that will be otherwise perceived as echo by the remote party. If you use a GSM module, embedded device, or if you can set off the sidetone in the cellphone you use as interface, you don't need echo canceling.
With PortAudio without gsmlib (uses text mode SMS encoding and decoding, compiled as plain C module, does not require any C++ lib or runtime). This build uses libspeexdsp to cancel the sidetone produced by cellphones used as physical interface, that will be otherwise perceived as echo by the remote party. If you use a GSM module, embedded device, or if you can set off the sidetone in the cellphone you use as interface, you don't need echo canceling.
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