Guilhem Saurel / AV_MQTT

An AirVantage layer for MQTT

Dependencies:   niMQTT picojson

Dependents:   AV_MQTT_example

AV_MQTT.cpp@7:da5d90052cec, 2013-08-13 (annotated)

Committer:
Nim65s
Date:
Tue Aug 13 13:36:45 2013 +0000
Revision:
7:da5d90052cec
Parent:
6:b251f6276497 
call_callback is now virtual from niMQTT

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Nim65s 0:37b9835622f9 1 #include "AV_MQTT.h"
Nim65s 6:b251f6276497 2 #include "picojson.h"
Nim65s 0:37b9835622f9 3
Nim65s 6:b251f6276497 4 AV_MQTT::AV_MQTT(char *server, void (*callback)(const char *, const char*), char *username, char *password, char *id, int port, bool debug):
Nim65s 6:b251f6276497 5 niMQTT(server, callback, id, port, username, password, debug) {
Nim65s 0:37b9835622f9 6 topic = new char[strlen(username) + 15];
Nim65s 0:37b9835622f9 7 strcpy(topic, username);
Nim65s 0:37b9835622f9 8 strcat(topic, "/messages/json");
Nim65s 0:37b9835622f9 9 }
Nim65s 0:37b9835622f9 10
Nim65s 0:37b9835622f9 11 void AV_MQTT::pub(char *key, char *value) {
Nim65s 0:37b9835622f9 12 int key_length = strlen(key);
Nim65s 0:37b9835622f9 13 int value_length = strlen(value);
Nim65s 0:37b9835622f9 14 char json[key_length + value_length + 36];
Nim65s 0:37b9835622f9 15 strcpy(json, "[{\"");
Nim65s 0:37b9835622f9 16 strcat(json, key);
Nim65s 0:37b9835622f9 17 strcat(json, "\":[{\"timestamp\":null,\"value\":");
Nim65s 0:37b9835622f9 18 strcat(json, value);
Nim65s 0:37b9835622f9 19 strcat(json, "}]}]");
Nim65s 6:b251f6276497 20 niMQTT::pub(topic, json);
Nim65s 6:b251f6276497 21 }
Nim65s 6:b251f6276497 22
Nim65s 6:b251f6276497 23 void AV_MQTT::call_callback(const char *topic, const char *message) {
Nim65s 6:b251f6276497 24 picojson::value v;
Nim65s 6:b251f6276497 25 picojson::parse(v, message, message + strlen(message));
Nim65s 6:b251f6276497 26
Nim65s 6:b251f6276497 27 picojson::array a = v.get<picojson::array>()[0].get("write").get<picojson::array>(); //[0].get("mbed_mqtt_example.led_settings").to_str().c_str());
Nim65s 6:b251f6276497 28
Nim65s 6:b251f6276497 29 for (picojson::array::iterator i = a.begin(); i != a.end(); ++i) {
Nim65s 6:b251f6276497 30 picojson::object& o = i->get<picojson::object>();
Nim65s 6:b251f6276497 31 for (picojson::object::iterator it = o.begin(); it != o.end(); ++it) {
Nim65s 6:b251f6276497 32 callback(it->first.c_str(), it->second.to_str().c_str());
Nim65s 6:b251f6276497 33 }
Nim65s 6:b251f6276497 34 }
Nim65s 0:37b9835622f9 35 }