Cytron Technical Forum

Hi everyone!

in PR8 project, there was given the circuit that makes the conversion of RFID reader output serial uart to TTL for PIC, I'd like to know if there is no other way to interface the rfid reader to PIC without cutting down the wires of DB-9 cable.

in attachment i present my circuit using an MAX232 i need your opinion if the circuit will work or not.

Check out this tutorial: Wireless RFID Reader Using XBees

Hi, Mr obber, i have read the link you gave me and it worked very well, i am so glad and i thank you very much, I have found out the sample source code of Sending SMS trough GSM, i have tried to use it. but i didnt succeed. i receive alwas error, after sending the first AT comand i am using crystal of 4MHz, and was said that the source code is for 20MHZ, will be so that i can not succeed to send message? my GSM module has baudrate of 9600.

Confused, the earlier question is about RFID and RS232, but this is GSM. Which code are you referring to? What GSM modem? What microcontroller? There are thousands of possibilities.

the earlier question i solved successfully! now i am trying to send SMS using the code of control and monitor via SMS. i am using PIC16F877A.

i am using GSM SIM900 of SIMCOM, the question about RFID is already done. i am trying to associate the code of RFID And the code of sending SMS. (the code of sending message i have found on cytron site.)

I guess another topic with related title will be helpful as other forumers might want to contribute too.

How is your full circuit looks like ... kindly attach it so that a view could be generated via the circuit to help you out....