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11 years, 8 months ago.
how come i get 0degree temperature when i (i think correctly) adress my TMP102
Hi, I cannot read anything from the TMP102, i tried with the example code and this gave nothing. I made my own code:
#include "mbed.h"
Serial pc (USBTX, USBRX);
I2C i2c (p9, p10);
const int addr = 0x90;
int main() {
char send[1];
send[0]=0; //sending the pointer adres to temperature register
char ontvangentemp[2]; //want 2 bytes of information in
while(1){
i2c.write(addr, send, 1, 0);
i2c.read(addr, ontvangentemp, 2, 0);
pc.printf("test voor TMP102_nieuw1\n\r");
pc.printf("\n\r the temperatuur is %d , %d", ontvangentemp[0], ontvangentemp[1]);
}
}
The first time i got "test .... the temperatuur is 0, 128), the next times i always get 0,0. how come? i know this will not be the right temperature because i still have to do some conversion Next problem is, most of the time when i push on the button nothing happens in hyperterminal, and then suddenly they come with 10 at the time and i dont see a relation when it happens. anybody has an idea, thanks in advance
1 Answer
11 years, 8 months ago.
Have you tried the TMP102 library? You can find a link to it and an example of its use on the cookbook page TMP102 Temperature Sensor.