motion-sensor/motion.c

#include <unistd.h>
#include <wiringPi.h>
#include <stdio.h>
#include <stdlib.h>

#include <curl/curl.h>

#define MOTION_PIN 0
#define SECONDS_TO_OFF 5*60

int pin_read = 0;
int state = 1;
unsigned long counter = 0;

size_t curl_callback(void *dest, size_t size, size_t nmemb, void *userp) {
    //This is only to "process" the body of the HTTP Post. curl will not return else.
    return 0;
}
size_t curl_output(void *buffer, size_t size, size_t nmemb, void *userp) {
    //This is to hide the output.
    return size * nmemb;
}

void light_control_script(int turn_on) {
    CURL *curl;
    CURLcode res = curl_global_init(CURL_GLOBAL_ALL);

    if(res != CURLE_OK) {
       printf("curl init failed\n");
       return;
    }

    curl = curl_easy_init();

    if(curl) {
        if(turn_on) {
            printf("Running light on script\n");
            curl_easy_setopt(curl, CURLOPT_URL, "https://hass.c0ntroller.de/api/services/script/light_kitchen_on");
        } else {
            printf("Running light off script\n");
            curl_easy_setopt(curl, CURLOPT_URL, "https://hass.c0ntroller.de/api/services/script/light_kitchen_off");
        }
        curl_easy_setopt(curl, CURLOPT_POST, 1L);
        curl_easy_setopt(curl, CURLOPT_READFUNCTION, curl_callback);
        curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, curl_output);
        curl_easy_setopt(curl, CURLOPT_VERBOSE, 0L);
        struct curl_slist *chunk = NULL;
        chunk = curl_slist_append(chunk, "Authorization: Bearer eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJpc3MiOiIwYzBjYzMzOWZmOGQ0NjBiYmJiYzI3NjA2M2U1MjhjNCIsImlhdCI6MTYwMzcxMDAzMywiZXhwIjoxOTE5MDcwMDMzfQ.HSnBiBNG6x6b1AAgh6AEAUALj4uSWfv-y-YS7QrNve0");
        curl_easy_setopt(curl, CURLOPT_HTTPHEADER, chunk);
        curl_easy_setopt(curl, CURLOPT_TIMEOUT, 1L);

        res = curl_easy_perform(curl);
        if(res != CURLE_OK) {
            fprintf(stderr, "curl_easy_perform() failed: %s\n",curl_easy_strerror(res));
        }
        curl_easy_cleanup(curl);
        curl_slist_free_all(chunk);
    }
    curl_global_cleanup();
}

int main(){
    wiringPiSetup();
    pinMode(MOTION_PIN, INPUT);
    while(1){
        pin_read = digitalRead(MOTION_PIN);

        while(state && !pin_read){
             counter += 1;
             if(counter >= SECONDS_TO_OFF*2){
                 printf("Turning off\n");
                 //system("tvservice -o");
                 system("vcgencmd display_power 0");
                 light_control_script(0);
                 state = 0;
             }
             usleep(500*1000);
             pin_read = digitalRead(MOTION_PIN);
        }

        if(!state && pin_read){
            printf("Turning on\n");
            light_control_script(1);
            system("vcgencmd display_power 1");
            //system("tvservice -p");
            //system("fbset -depth 8");
            //usleep(50*1000);
            //system("fbset -depth 16");
            //usleep(50*1000);
            //system("fbset -depth 24");
            //usleep(50*1000);
            //system("fbset -depth 32");
            state = 1;
        }
        counter = 0;
        usleep(500*1000);
    }
}