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OK,
Now i solved the restarting problem by Inserting two 7805 Voltage regulators in parallel and 100 uF capacitor as a buffer.
Thank you guys (Specially FvM and ckshivaram )for all the help regarding power issues.
Now i am trying to access my SIM tool kit to perform some specific operations...
@ ckshivaram
I have checked the SIM card connections, they are not shorted.
@ FvM
can you please suggest any other voltage regulator that can supply, 4.5V and 2A.
One more thing to say,
Some times its fully working, even i sent sms and make calls. But this is a very rear case.
I mean if i...
I am using 9V DC Battery to give it power.
For voltage regulator, i am using LM7805, it can provide 1A of current and 5V. This supply powering up SIM300W and MAX232.
When i gave it 5V, modem response was:
Maximum Power limit exceed
and then
Normal Power Down.
So i implant the DIODE after...
Now i solved the issue with garbage values by resetting the module after power on.
I new problem is faced now, when i insert the sim card in the module, it restarts after each 5 secs. I am seeing this response rapidly.
FUN:1
CPIN=Ready
Call Ready
and then again
FUN:1
CPIN=Ready
Call...
screenshot of what?
Default baudrate is 9600, i checked by AT+IPC?
Reset button means PWR KEY of module.
When i power on the supply, and type in hyper terminal. it gives garbage value. And then i pulled down PWR KEY of module, and then it accept all the at commands. Is it a way, so i may not...
hi, ckshivaram
I have just tried these commands.
But it still sending the gerbage values.
And now when i reset the module using its reset pin pulled down to ground. It works fine, but when i restart the supply, it again sending the gerbage valuse.
I also tried baud rate setting command as...
Friends, Now i solve the issue, i can now write on hyperterminal screen, but this is a garbage value, different from what i was typing.
Is it a problem with baud rate or connections?
Thanks in advance
hi, all
I have a problem with sim300W module, please help.
When i connect my module to hyper terminal via RS232. It do nothing, i am even enable to type command from hyper terminal.
Remember i am using SIM300W Module Not Modem.
Pin Connections...
Hi,
Thanks for reply,
yes multiplexing is another option, but what will happen when i receive a signal from module, i.e. Alert for SMS, Alert for call, or any other Interrupt?
Hi every one,
I have a plan to make a Bulk SMS Modem Pool to send Advertisment sms.
I have 8 sim300W GSM modules and 1 atmega32, is it possible to make Master, slave Interface using I2C Protocol to communicate with all modules?
Or i have to make 8 serial UART using BIT Banging?
Thanks in Advance
Hi, liteon thanks for your analysis about the Pakistanis.
I think you are one of them who don't share their knowledge, and you must be ashamed of what you wrote here.
---------- Post added at 07:43 ---------- Previous post was at 07:34 ----------
Hi Tipu,
Try to download the latest version...
Yes you r right. Sim300 is just a GPRS/GSM modem. It has no GPS .
---------- Post added at 21:27 ---------- Previous post was at 21:17 ----------
you have to connect your MCU with sim300 using USART.
For sending SMS through sim300
send these commands in sequence through UART Transmitter...
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