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Troubleshooting ercisson t10 sms project

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sakib501

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Hello, I have been trying to do the sms based remote control project from https://www.serasidis.gr/circuits/smscontrol/smscontroller.htm

As soon as the ericsson t10 phone recieves the sms it gets deleted. but I can not see any voltage change in the output pin. I do not know how 12vdc 5 pin relay works. So, will the circuit work if I remove the relay part and just put a LED which will turn on and off by the sms?

I am from Bangladesh where Cell phone number contains 11 digit. The project was tested in Greece using Vodafone which contains 10 digit number. Will it be a problem??

regards
 

Hi sakib501,

No effect on removing Relays and using LEDs.

Your SMS is deleted without any output is due to length difference of your phone number.

You have to correctly locate "User data" (which you type to send SMS eg. 01110011 )in PDU string. Starting location of your message in PDU string depends on length and format of your phone number.
Read **broken link removed**; this describe structure of PDU format SMS. Try to read SMS in HyperTeminal and find where your message is started. Hence you have to edit uC program to read user message correctly.

Wish you success,
 

using another phone and hyperterminal it received a sms of 1111000 like this -

08 91 881006006000F1 04 0D 91 881076837520F5 00 00 01703291240242 08

B1 58 2C 06 83 C1 60

now the service center and mobile number is 14 digit including the F. but in the project it was like 12 digit including the F.

can u tell me where do i have to change in the code??

regards
 

Hi sakib501,

Increase location number of "First byte of the message in the RAM (message like this 11001101)" by 4 and try.
Use a debugger to watch uC RAM after it read the msg. Then edit RAM-location pointer loading instructions.(for service center, user number....message)


Wish you success,
 

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