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https://github.com/cesanta/mongoose.git
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59 lines
1.9 KiB
C
59 lines
1.9 KiB
C
#include "net.h"
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#define MQTT_SERVER "mqtt://broker.hivemq.com:1883"
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struct mg_connection *mqtt_connection;
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const char *mqtt_subscribe_topic = "mg/rx";
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const char *mqtt_publish_topic = "mg/tx";
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struct mg_mgr mgr; // Mongoose event manager
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struct mg_tcpip_if mif = {.mac = {2, 0, 1, 2, 3, 5}}; // network interface
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void mqtt_publish(const char *message) {
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struct mg_mqtt_opts opts = {};
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opts.topic = mg_str(mqtt_publish_topic);
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opts.message = mg_str(message);
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if (mqtt_connection) mg_mqtt_pub(mqtt_connection, &opts);
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}
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static void fn(struct mg_connection *c, int ev, void *ev_data, void *fn_data) {
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if (ev == MG_EV_MQTT_OPEN) {
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MG_INFO(("%lu CONNECTED to %s", c->id, MQTT_SERVER));
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struct mg_mqtt_opts opts = {};
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opts.topic = mg_str(mqtt_subscribe_topic);
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mg_mqtt_sub(c, &opts);
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MG_INFO(("%lu SUBSCRIBED to %s", c->id, mqtt_subscribe_topic));
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} else if (ev == MG_EV_MQTT_MSG) {
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// Received MQTT message
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struct mg_mqtt_message *mm = (struct mg_mqtt_message *) ev_data;
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MG_INFO(("%lu RECEIVED %.*s <- %.*s", c->id, (int) mm->data.len,
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mm->data.ptr, (int) mm->topic.len, mm->topic.ptr));
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exec_command(mm->data.ptr, mm->data.len);
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} else if (ev == MG_EV_CLOSE) {
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MG_INFO(("%lu CLOSED", c->id));
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mqtt_connection = NULL;
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}
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}
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static void timer_fn(void *arg) {
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struct mg_mgr *mgr = (struct mg_mgr *) arg;
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struct mg_mqtt_opts opts;
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memset(&opts, 0, sizeof(opts));
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opts.clean = true;
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if (mif.state == MG_TCPIP_STATE_READY && mqtt_connection == NULL) {
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mqtt_connection = mg_mqtt_connect(mgr, MQTT_SERVER, &opts, fn, NULL);
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}
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// MG_INFO(("Eth: %d, MQTT: %p", mif.state, mqtt_connection));
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}
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void net_init(void) {
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// Set Mongoose logging function to a serial print
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mg_mgr_init(&mgr);
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mif.driver = &mg_tcpip_driver_w5500;
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mif.driver_data = &spi;
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mg_tcpip_init(&mgr, &mif);
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// Start a timer that keeps MQTT connection alive
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mg_timer_add(&mgr, 3000, MG_TIMER_REPEAT, timer_fn, &mgr);
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}
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