Adafruit_MQTT_Library/Adafruit_MQTT_CC3000.h

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// The MIT License (MIT)
//
// Copyright (c) 2015 Adafruit Industries
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
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#ifndef _ADAFRUIT_MQTT_CC3000_H_
#define _ADAFRUIT_MQTT_CC3000_H_
#include <Adafruit_SleepyDog.h>
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#include <Adafruit_CC3000.h>
#include "Adafruit_MQTT.h"
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// delay in ms between calls of available()
#define MQTT_CC3000_INTERAVAILDELAY 10
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// CC3000-specific version of the Adafruit_MQTT class.
// Note that this is defined as a header-only class to prevent issues with using
// the library on non-CC3000 platforms (since Arduino will include all .cpp files
// in the compilation of the library).
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class Adafruit_MQTT_CC3000 : public Adafruit_MQTT {
public:
Adafruit_MQTT_CC3000(Adafruit_CC3000 *cc3k, const char *server, uint16_t port,
const char *cid, const char *user, const char *pass):
Adafruit_MQTT(server, port, cid, user, pass),
cc3000(cc3k)
{}
bool connectServer() {
uint32_t ip = 0;
Watchdog.reset();
// look up IP address
if (serverip == 0) {
// Try looking up the website's IP address using CC3K's built in getHostByName
strcpy_P((char *)buffer, servername);
Serial.print((char *)buffer); Serial.print(F(" -> "));
uint8_t dnsretries = 5;
Watchdog.reset();
while (ip == 0) {
if (! cc3000->getHostByName((char *)buffer, &ip)) {
Serial.println(F("Couldn't resolve!"));
dnsretries--;
Watchdog.reset();
}
//Serial.println("OK"); Serial.println(ip, HEX);
if (!dnsretries) return false;
delay(500);
}
serverip = ip;
cc3000->printIPdotsRev(serverip);
Serial.println();
}
Watchdog.reset();
// connect to server
DEBUG_PRINTLN(F("Connecting to TCP"));
mqttclient = cc3000->connectTCP(serverip, portnum);
return mqttclient.connected();
}
bool disconnect() {
if (connected()) {
return (mqttclient.close() == 0);
}
else {
return true;
}
}
bool connected() {
return mqttclient.connected();
}
uint16_t readPacket(uint8_t *buffer, uint8_t maxlen, int16_t timeout,
bool checkForValidPubPacket = false) {
/* Read data until either the connection is closed, or the idle timeout is reached. */
uint16_t len = 0;
int16_t t = timeout;
while (mqttclient.connected() && (timeout >= 0)) {
//DEBUG_PRINT('.');
while (mqttclient.available()) {
//DEBUG_PRINT('!');
char c = mqttclient.read();
timeout = t; // reset the timeout
buffer[len] = c;
//DEBUG_PRINTLN((uint8_t)c, HEX);
len++;
if (len == maxlen) { // we read all we want, bail
DEBUG_PRINT(F("Read packet:\t"));
DEBUG_PRINTBUFFER(buffer, len);
return len;
}
// special case where we just one one publication packet at a time
if (checkForValidPubPacket) {
if ((buffer[0] == (MQTT_CTRL_PUBLISH << 4)) && (buffer[1] == len-2)) {
// oooh a valid publish packet!
DEBUG_PRINT(F("Read PUBLISH packet:\t"));
DEBUG_PRINTBUFFER(buffer, len);
return len;
}
}
}
Watchdog.reset();
timeout -= MQTT_CC3000_INTERAVAILDELAY;
delay(MQTT_CC3000_INTERAVAILDELAY);
}
return len;
}
bool sendPacket(uint8_t *buffer, uint8_t len) {
if (mqttclient.connected()) {
uint16_t ret = mqttclient.write(buffer, len);
DEBUG_PRINT(F("sendPacket returned: ")); DEBUG_PRINTLN(ret);
if (ret != len) {
DEBUG_PRINTLN("Failed to send complete packet.")
return false;
}
} else {
DEBUG_PRINTLN(F("Connection failed!"));
return false;
}
return true;
}
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private:
uint32_t serverip;
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Adafruit_CC3000 *cc3000;
Adafruit_CC3000_Client mqttclient;
};
#endif