Cytron Technical Forum

thanks for the ideas....
Do you have any tutorial videos on the URS232A or any that related on serial communication??(could you share please)
is the looping of DTR(pin4) and DSR(pin6) , RTS(pin7) and CTS(pin8) can be ignore during the construction of their schematic??
is the schematic connection of Db-9 connection for male and female connector is the same??
i using pic16f877A the source is built successfully by using mplab hightech compiler and i burn the source in to the pic but the hardware doesn't work... what need to be modified form the source code...
i really need help in the source code of sending sms and displaying the LCD....
please help me....

I also faced the same issue...

thanks for the ideas....
Do you have any tutorial videos on the URS232A or any that related on serial communication??(could you share please)
is the looping of DTR(pin4) and DSR(pin6) , RTS(pin7) and CTS(pin8) can be ignore during the construction of their schematic??
is the schematic connection of Db-9 connection for male and female connector is the same??
i using pic16f877A the source is built successfully by using mplab hightech compiler and i burn the source into the pic but the hardware doesn't work... what need to be modified form the source code...
i really need help in the source code of sending sms and displaying the LCD....
please help me.... here is the link to the source code http://tutorial.cytron.com.my/2011/12/0 ... r-via-sms/

I already test the GSM TC35 using URS232A connect to PC and Arduino. This is the step:

1. Short RTS and CTS on the URS232A

2. Connect URS232A to UC00A (use 6 header pin) for USB on the PC connection. Open HyperTerminal software. Test AT command.

3. Connect URS232A to Arduino pin (URS232A TX - D2, URS232A RX - D3).

4. Open "Examples - GSM - Tools - TestModem". Result example:

please help me with the link for code i cannot download it from the link in the article
thanks

rodrider WROTE:please help me with the link for code i cannot download it from the link in the article
thanks

Hi rodrider, we have fix the link, you can try to download it. Thanks.

Thanks Idris

According to me you are saying that you tested the modem with computer and it is working?
Can you please provide some more detail, that is critical. If you test with computer and it is working, we know is not the modem problem.
We can focus on connection from SK40 to modem, which we ask for a photo. Well, experience tell us, everyone will say the connection is the same until we found mistake, because we make assumption.
You might miss something.

I think gsm_send_command has an error

Hi...i am a new user here. It is looking like there is something wrong from the RS232 to the modem. Please post your codes as well as the terminal screenshot and the photo of your circuit. The faster you give the information needed. The faster people in the chat can narrow your problems down.

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