GE865 and PIC C18 Compiler putrsUSART problem

4 thoughts on “GE865 and PIC C18 Compiler putrsUSART problem”

1. Hello !

    

   I’m developing with GE865-QUAD and PIC18F26K20 (C18 COMPILER).

    

   I want to make a function to SEND SMS, so i’ve tried:

    

   char SendSMS(char *destination_number, char *message_text)
   {
       putrsUSART ("AT+CMGS=");                 // AT CMD
       putrsUSART (destination_number);    // Destination Number
       putrsUSART ("r");                                    // Send AT CMD + Destination Number Line

       putrsUSART(text);                            // Send Text
       WriteUSART(0x1A);                         // CTRL+Z (Finish Message)
   }

    

   Then i call it as SendSMS("1234567890", "test")

    

   But it’s not working, when i send the "AT+CMGS=""DESTINATION NUMBER" , i get an ERROR response from GE865 after the putrsUSART ("r");

    

   If i make

   putrsUSART ("AT+CMGS=1234567890");

   putrsUSART ("r");

    

   then it WORKS. The error only ocurrs when i send the AT CMD and phone number on different putrsUSART calls.

    

   Is there a workaound to this ?

    

   Is there even a reasonable explanation for this ? As the putrsUSART doesn’t send any control character like r ?

    

   Thank’s !

   1. Nevermind,

       

      The problem with the putrsUSART is that it sends a NULL character after the last byte of the string.

       

      The workaround is to build another function to send the string without the NULL character.

   2. Hello.

      I need help.

      as
      I can connect to gc864 16f8440 Packed connected to USART
      This is my scheme.

      thanks

      1. Take care that C103/TXD is serial data input into module and C104/RXD is serial data output to DTE.

         Quote from Hardware User Guide:

          

         *NOTE:
         According to V.24, RX/TX signal names are referred to the application side, therefore
         on the GE864 side these signal are on the opposite direction: TXD on the application
         side will be connected to the receive line (here named TXD/ rx_uart ) of the  GE864
         serial port and vice versa for RX.