73 lines
2.0 KiB
C
73 lines
2.0 KiB
C
#include <stdio.h>
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#include "contiki.h"
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#include "contiki-net.h"
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#include "rest-engine.h"
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#include "net/ip/uip-debug.h"
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int precious_resource = 0;
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char sensor_name[32]; /* for RFC8428 */
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/* handlers for coap */
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void res_get_handler(void* request, void* response, uint8_t* buffer, uint16_t preferred_size, int32_t* offset) {
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static char payload[128];
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sprintf(payload, "[{\"n\":\"urn:it.unipi.ing.ce.netpp:%s\",\"v\":%d}]", sensor_name, precious_resource);
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REST.set_header_content_type(response, REST.type.TEXT_PLAIN);
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REST.set_response_payload(response, payload, strlen(payload));
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printf("[D] GET handled\n");
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}
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void res_periodic_handler();
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/* declare resource and set handlers */
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PERIODIC_RESOURCE(myresource, "title=\"An observable resource\";rt=\"some descriptive text\";obs", res_get_handler, NULL, NULL, NULL, 60 * CLOCK_SECOND, res_periodic_handler);
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void res_periodic_handler() {
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/* sample some sensor */
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/* byte mysample = *(some_bar + some_offset); */
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++precious_resource;
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printf("sampled the precious resource: %d\n", precious_resource);
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/* Notify subscribers of the new sample */
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REST.notify_subscribers(&myresource);
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}
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/* contiki protothread, as usual... */
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PROCESS(main_process_name, "Simple-CoAP-Server");
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AUTOSTART_PROCESSES(&main_process_name);
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PROCESS_THREAD(main_process_name, ev, data) {
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PROCESS_BEGIN();
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printf("Started....\n");
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/* print enabled addresses */
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printf("My addresses:\n");
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int i;
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for (i = 0; i < UIP_DS6_ADDR_NB; ++i) {
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if (uip_ds6_if.addr_list[i].isused) {
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uip_debug_ipaddr_print(&uip_ds6_if.addr_list[i].ipaddr);
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printf("\n");
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}
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}
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/* set sensor_name as mac address */
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for (i = 0; i < sizeof(uip_lladdr.addr); ++i) {
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sprintf(sensor_name + i, "%02x", (unsigned char)uip_lladdr.addr[i]);
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}
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/* enable CoAP engine */
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rest_init_engine();
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rest_activate_resource(&myresource, "PreciousResource");
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while (1) {
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PROCESS_WAIT_EVENT();
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}
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PROCESS_END();
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}
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