Temperature Sensor TPM-01
- $99,999.00
- Availability: Out Of Stock
- Brand: FriendlyElec
- Product Code: TPM-01
1 Introduction
We utilitze the DS18B20 in this module. The DS18B20 can be powered from its data line. Each DS18B20 is assigned a unique ID. Its temperature range is -55 degree Celsius to +125 degree Celsius. The thermometer resolution is programmable from 9 to 12 bits. When the measured temperature is between -10 degree Celsius to +85 degree Celsius the accuracy can be at 0.5 degree. It uses the unique 1-wire interface which requires only one port pin for communication. Among all three DS18B20 pins V is power, G is ground and S is data.
2 Features
- -55 degree Celsius to +125 degree Celsius
- One wire interface for communication
- Tiny, easy to be used in various situations
- 2.54mm spacing pin
3 How To
- Connect to Tiny4412 SDK (1506)
GND: Ground
VCC: 5V
S: GPIO_PIN1
Code Sample in C Under Linux
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include "libfahw.h"
void parseCmd(int argc, char **argv, int *pin)
{
int num = atoi(argv[1]);
switch(num) {
case 1:
*pin = TINY4412_GPIO_PIN1;
break;
case 2:
*pin = TINY4412_GPIO_PIN2;
break;
case 3:
*pin = TINY4412_GPIO_PIN3;
break;
case 4:
*pin = TINY4412_GPIO_PIN4;
break;
case 5:
*pin = TINY4412_GPIO_PIN5;
break;
case 6:
*pin = TINY4412_GPIO_PIN6;
break;
case 7:
*pin = TINY4412_GPIO_PIN7;
break;
case 8:
*pin = TINY4412_GPIO_PIN8;
break;
case 9:
*pin = TINY4412_GPIO_PIN9;
break;
case 10:
*pin = TINY4412_GPIO_PIN10;
break;
default:
printf("Unsupported pin TINY4412_GPIO_PIN%d ", num);
num = 1;
*pin = TINY4412_GPIO_PIN1;
break;
}
printf("Using pin TINY4412_GPIO_PIN%d ", num);
}
int main(int argc, char ** argv)
{
int devFD = -1;
int pin = TINY4412_GPIO_PIN1;
char *temperature = (char *) malloc(
32);
memset(temperature, 0, 32);
if (argc == 2) {
parseCmd(argc, argv, &pin);
} else {
printf("Using default pin TINY4412_GPIO_PIN1 ");
}
if ((devFD = ds18b20Init(pin)) == -1) {
printf("Fail to init ds18b20 ");
return -1;
}
if (ds18b20Read(temperature) > 0) {
printf("Temperature = %s ", temperature);
} else {
printf("Fail to get temperature ");
}
free(temperature);
ds18b20DeInit(devFD);
return 0;
}
Compile and Run
git clone http://github.com/friendlyarm/fa-hardware.git
cd fa-hardware
cd demo
cd matrix-temperature_sensor
make
Copy your compiled bin to your board and you are ready to go.
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