[varuni]

i am interfacing lm35 to lpc2148 using mcb2140 development board. in this project whwn the temp goes beyond a certain value i want the speaker to sound as well as message must be sent to mobile using gsm.how to get sound from the speaker?

what are the connections to be made on the board.please specify the jumper connections. please help us out

[varuni]

                  In that same code, i am not getting understood ,what is the preset temperature value,over which if it goes ,the gsm needs to send the message.

                  lm35 is used whose range is -55deg to 150deg  and is linear with temp in degree celsius..its sensitivity is .01v/deg

 

 

int main (void) 

{

.

.

.

while(1)

{

x=process_adc();//Read ADC value and display it on first line of LCD

wait(30);

if(x>300)

{

string=”AT+CMGS=”;

while(*string != ‘’)

{

while(!(U1LSR & 0x20));

U1THR=*string;

string++; 

wait(3);

}

.

.

.

 and so..

 

so does this “if(x>300)” indicates the threshold value as  300deg?  as  the “process_adc()” gives us the adc value  ??but lm35 can measure upto 150deg. so can i just  change it to the temp within its range? 

 

 

 

[varuni]

Ok..got to know…thanks

[varuni]

                 The project is “overheating alert in remote areas”, using arm7, which uses  gsm modem  &  temperature sensor  ..If the  temperature  goes beyond the preset value, this gsm,controlled by arm7, is supposed to send the message to the previously stored number

 

                 I got the code from this engineersgarage The code contains  file inclusions for adc,lcd .It contains “lcd.h” “lcd.c”..similarly “adc.h”,”adc.c”..so while building the target  in keilmicrovision4 ,for the main code,i am getting confused ..whether to create the target  for  “lcd.h and adc.h”?or for “adc.c and lcd.c” and then  convert them to hex file and then include those files??! 

 

shall i paste the whole code in  this reply column?Am  i allowed to paste here?  if not ,should i mail it to you? if so pls mention your mail id..

 

thanks

[Author]

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