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Example code for the Contiki websocket client

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This commit is contained in:
Adam Dunkels 2016-10-31 22:07:01 +01:00
parent 4d61e8f997
commit 4f13d637e6
2 changed files with 69 additions and 0 deletions
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6
examples/websockets/Makefile Normal file
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all: websocket-example
CONTIKI=../..
include $(CONTIKI)/Makefile.include

63
examples/websockets/websocket-example.c Normal file
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#include "contiki.h"
#include "websocket.h"
#include <stdio.h>
static struct websocket s;
static void callback(struct websocket *s, websocket_result_t r,
const uint8_t *data, uint16_t datalen);
#define RECONNECT_INTERVAL 10 * CLOCK_SECOND
static struct ctimer reconnect_timer;
/*---------------------------------------------------------------------------*/
PROCESS(websocket_example_process, "Websocket Example");
AUTOSTART_PROCESSES(&websocket_example_process);
/*---------------------------------------------------------------------------*/
static void
reconnect_callback(void *ptr)
{
websocket_open(&s, "ws://172.16.0.1:8080/",
"contiki", NULL, callback);
}
/*---------------------------------------------------------------------------*/
static void
callback(struct websocket *s, websocket_result_t r,
const uint8_t *data, uint16_t datalen)
{
if(r == WEBSOCKET_CLOSED ||
r == WEBSOCKET_RESET ||
r == WEBSOCKET_HOSTNAME_NOT_FOUND ||
r == WEBSOCKET_TIMEDOUT) {
ctimer_set(&reconnect_timer, RECONNECT_INTERVAL, reconnect_callback, s);
} else if(r == WEBSOCKET_CONNECTED) {
websocket_send_str(s, "Connected");
} else if(r == WEBSOCKET_DATA) {
printf("websocket-example: Received data '%.*s' (len %d)\n", datalen,
data, datalen);
}
}
/*---------------------------------------------------------------------------*/
PROCESS_THREAD(websocket_example_process, ev, data)
{
static struct etimer et;
PROCESS_BEGIN();
ctimer_set(&reconnect_timer, RECONNECT_INTERVAL, reconnect_callback, &s);
websocket_init(&s);
while(1) {
etimer_set(&et, CLOCK_SECOND / 8);
PROCESS_WAIT_EVENT_UNTIL(etimer_expired(&et));
char buf[] = "012345678";
static int count;
buf[0] = (count % 9) + '0';
count++;
websocket_send_str(&s, buf);
}
PROCESS_END();
}
/*---------------------------------------------------------------------------*/