mathieu/Adafruit_MQTT_Library
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This commit is contained in:
ladyada 2015-06-02 18:33:03 -04:00
parent 7c5113e32e
commit 0152ac91cb
4 changed files with 266 additions and 66 deletions
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34
Adafruit_MQTT.cpp
View File

@ -8,6 +8,10 @@ Adafruit_MQTT::Adafruit_MQTT(const char *server, uint16_t port, const PROGMEM ch
clientid = cid;
username = user;
password = pass;
for (uint8_t i=0; i<MAXSUBSCRIPTIONS; i++) {
subscriptions[i] = 0;
}
}
/*
@ -116,6 +120,30 @@ uint8_t Adafruit_MQTT::publishPacket(uint8_t *packet, const char *topic, char *d
return len;
}
uint8_t Adafruit_MQTT::subscribePacket(uint8_t *packet, const char *topic, uint8_t qos) {
uint8_t *p = packet;
uint16_t len;
p[0] = MQTT_CTRL_SUBSCRIBE << 4 | MQTT_QOS_1 << 1;
// fill in packet[1] last
p+=2;
// put in a message id,
p[0] = 0xAD;
p[1] = 0xAF;
p+=2;
p = stringprint_P(p, topic);
p[0] = qos;
p++;
len = p - packet;
packet[1] = len-2; // don't include the 2 bytes of fixed header data
return len;
}
Adafruit_MQTT_Publish::Adafruit_MQTT_Publish(Adafruit_MQTT *mqttserver, const char *feed, uint8_t q) {
mqtt = mqttserver;
@ -140,3 +168,9 @@ bool Adafruit_MQTT_Publish::publish(char *payload) {
return mqtt->publish(topic, payload, qos);
}
Adafruit_MQTT_Subscribe::Adafruit_MQTT_Subscribe(Adafruit_MQTT *mqttserver, const char *feed, uint8_t q) {
mqtt = mqttserver;
topic = feed;
qos = q;
}

29
Adafruit_MQTT.h
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@ -12,6 +12,8 @@
#define MQTT_CTRL_CONNECT 0x01
#define MQTT_CTRL_CONNECTACK 0x02
#define MQTT_CTRL_PUBLISH 0x03
#define MQTT_CTRL_SUBSCRIBE 0x08
#define MQTT_CTRL_SUBACK 0x09
#define MQTT_CTRL_PINGREQ 0x0C
#define MQTT_CTRL_PINGRESP 0x0D
@ -39,7 +41,18 @@
#define MQTT_CONN_CLEANSESSION 0x02
#define MQTT_CONN_KEEPALIVE 15 // in seconds
#define MAXBUFFERSIZE (60)
#define MAXBUFFERSIZE (85)
#define MAXSUBSCRIPTIONS 5
#define SUBSCRIPTIONDATALEN 20
//#define DEBUG_MQTT_CONNECT
//#define DEBUG_MQTT_SUBSCRIBE
//#define DEBUG_MQTT_READSUB
//#define DEBUG_MQTT_PUBLISH
//#define DEBUG_MQTT_PACKETREAD
class Adafruit_MQTT_Subscribe; // forward decl
class Adafruit_MQTT {
public:
@ -53,6 +66,11 @@ class Adafruit_MQTT {
virtual boolean ping(uint8_t t) {}
uint8_t pingPacket(uint8_t *packet);
virtual boolean subscribe(Adafruit_MQTT_Subscribe *sub) {}
uint8_t subscribePacket(uint8_t *packet, const char *topic, uint8_t qos);
virtual Adafruit_MQTT_Subscribe *readSubscription(int16_t timeout = 0) {};
protected:
int8_t errno;
const char *servername;
@ -62,6 +80,7 @@ class Adafruit_MQTT {
const char *username;
const char *password;
Adafruit_MQTT_Subscribe *subscriptions[MAXSUBSCRIPTIONS];
uint8_t buffer[MAXBUFFERSIZE];
};
@ -82,10 +101,16 @@ private:
class Adafruit_MQTT_Subscribe {
public:
Adafruit_MQTT_Subscribe(Adafruit_MQTT *mqttserver, char *feedname);
Adafruit_MQTT_Subscribe(Adafruit_MQTT *mqttserver, const char *feedname, uint8_t q=0);
bool setCallback(void (*callback)(char *));
const char *topic;
uint8_t qos;
uint8_t * lastread[SUBSCRIPTIONDATALEN];
private:
Adafruit_MQTT *mqtt;
};

255
Adafruit_MQTT_CC3000.cpp
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@ -2,6 +2,22 @@
#include "Adafruit_MQTT_CC3000.h"
#include <Adafruit_Watchdog.h>
static void printBuffer(uint8_t *buffer, uint8_t len) {
for (uint8_t i=0; i<len; i++) {
if (isprint(buffer[i]))
Serial.write(buffer[i]);
else
Serial.print(" ");
Serial.print(F(" [0x"));
if (buffer[i] < 0x10)
Serial.print("0");
Serial.print(buffer[i],HEX);
Serial.print("], ");
if (i % 8 == 7) Serial.println();
}
Serial.println();
}
Adafruit_MQTT_CC3000::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)
{
// nothin doin
@ -39,30 +55,26 @@ int8_t Adafruit_MQTT_CC3000::connect(void) {
Watchdog.reset();
// connect to server
#ifdef DEBUG_MQTT_CONNECT
Serial.println(F("Connecting to TCP"));
#endif
mqttclient = cc3000->connectTCP(serverip, portnum);
uint8_t len = connectPacket(buffer);
Serial.println(F("MQTT connection packet:"));
for (uint8_t i=0; i<len; i++) {
if (isprint(buffer[i]))
Serial.write(buffer[i]);
else
Serial.print(" ");
Serial.print(F(" [0x"));
if (buffer[i] < 0x10)
Serial.print("0");
Serial.print(buffer[i],HEX);
Serial.print("], ");
if (i % 8 == 7) Serial.println();
}
Serial.println();
#ifdef DEBUG_MQTT_CONNECT
Serial.println(F("MQTT connection packet:")); printBuffer(buffer, len);
#endif
if (mqttclient.connected()) {
uint16_t ret = mqttclient.write(buffer, len);
//Serial.print("returned: "); Serial.println(ret);
#ifdef DEBUG_MQTT_CONNECT
Serial.print("returned: "); Serial.println(ret);
#endif
if (ret != len) return -1;
} else {
#ifdef DEBUG_MQTT_CONNECT
Serial.println(F("Connection failed"));
#endif
return -1;
}
@ -70,46 +82,85 @@ int8_t Adafruit_MQTT_CC3000::connect(void) {
if (len != 4) return -1;
if ((buffer[0] == (MQTT_CTRL_CONNECTACK << 4)) && (buffer[1] == 2)) {
// good packet structure
return buffer[3];
if ((buffer[0] != (MQTT_CTRL_CONNECTACK << 4)) || (buffer[1] != 2)) {
return -1;
}
if (buffer[3] != 0) return buffer[3];
/**************** subscription time! */
for (uint8_t i=0; i<MAXSUBSCRIPTIONS; i++) {
if (subscriptions[i] == 0) continue;
#ifdef DEBUG_MQTT_CONNECT
Serial.print(F("Subscribing..."));
#endif
uint8_t len = subscribePacket(buffer, subscriptions[i]->topic, subscriptions[i]->qos);
#ifdef DEBUG_MQTT_CONNECT
Serial.println(F("MQTT subscription packet:")); printBuffer(buffer, len);
#endif
if (mqttclient.connected()) {
uint16_t ret = mqttclient.write(buffer, len);
#ifdef DEBUG_MQTT_CONNECT
Serial.print("returned: "); Serial.println(ret);
#endif
if (ret != len) return -1;
} else {
#ifdef DEBUG_MQTT_CONNECT
Serial.println(F("Connection failed"));
#endif
return -1;
}
// Get SUBACK
len = readPacket(buffer, 5, CONNECT_TIMEOUT_MS);
#ifdef DEBUG_MQTT_CONNECT
Serial.print(F("SUBACK:\t")); printBuffer(buffer, len);
#endif
if ((len != 5) || (buffer[0] != (MQTT_CTRL_SUBACK << 4))) {
return 6; // failure to subscribe
}
}
return -1;
return 0;
}
uint16_t Adafruit_MQTT_CC3000::readPacket(uint8_t *buffer, uint8_t maxlen, int16_t timeout) {
uint16_t Adafruit_MQTT_CC3000::readPacket(uint8_t *buffer, uint8_t maxlen, int16_t timeout, boolean checkForValidPubPacket) {
/* 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)) {
Serial.print('.');
while (mqttclient.connected() && (timeout >= 0)) {
//Serial.print('.');
while (mqttclient.available()) {
Serial.print('!');
//Serial.print('!');
char c = mqttclient.read();
timeout = t; // reset the timeout
buffer[len] = c;
//Serial.print((uint8_t)c,HEX);
len++;
if (len == maxlen) { // we read all we want, bail
Serial.print(F("Read packet:\t"));
for (uint8_t i=0; i<len; i++) {
if (isprint(buffer[i]))
Serial.write(buffer[i]);
else
Serial.write(' ');
Serial.print(" [0x"); Serial.print(buffer[i], HEX); Serial.print("], ");
}
Serial.println();
#ifdef DEBUG_MQTT_PACKETREAD
Serial.print(F("Read packet:\t")); printBuffer(buffer, len);
#endif
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!
#ifdef DEBUG_MQTT_PACKETREAD
Serial.print(F("PUBLISH packet:\t")); printBuffer(buffer, len);
#endif
return len;
}
}
}
Watchdog.reset();
timeout-=10;
delay(10);
timeout -= MQTT_CC3000_INTERAVAILDELAY;
delay(MQTT_CC3000_INTERAVAILDELAY);
}
return len;
}
@ -117,11 +168,9 @@ uint16_t Adafruit_MQTT_CC3000::readPacket(uint8_t *buffer, uint8_t maxlen, int16
boolean Adafruit_MQTT_CC3000::ping(uint8_t times) {
while (times) {
uint8_t len = pingPacket(buffer);
Serial.print("Sending...\t");
for (uint8_t i=0; i<len; i++) {
Serial.print(" [0x"); Serial.print(buffer[i], HEX); Serial.print("], ");
}
Serial.println();
Serial.print(F("Sending:\t")); printBuffer(buffer, len);
if (mqttclient.connected()) {
uint16_t ret = mqttclient.write(buffer, len);
//Serial.print("returned: "); Serial.println(ret);
@ -146,40 +195,124 @@ int32_t Adafruit_MQTT_CC3000::close(void) {
boolean Adafruit_MQTT_CC3000::publish(const char *topic, char *data, uint8_t qos) {
uint8_t len = publishPacket(buffer, topic, data, qos);
Serial.println("MQTT publish packet:");
for (uint8_t i=0; i<len; i++) {
if (isprint(buffer[i]))
Serial.write(buffer[i]);
else
Serial.print(" ");
Serial.print(" [0x");
if (buffer[i] < 0x10)
Serial.print("0");
Serial.print(buffer[i],HEX);
Serial.print("], ");
if (i % 8 == 7) Serial.println();
}
Serial.println();
#ifdef DEBUG_MQTT_PUBLISH
Serial.println(F("MQTT publish packet:")); printBuffer(buffer, len);
#endif
if (mqttclient.connected()) {
uint16_t ret = mqttclient.write(buffer, len);
//Serial.print("returned: "); Serial.println(ret);
#ifdef DEBUG_MQTT_PUBLISH
Serial.print("returned: "); Serial.println(ret);
#endif
if (ret != len) return false;
} else {
#ifdef DEBUG_MQTT_PUBLISH
Serial.println(F("Connection failed"));
#endif
return false;
}
if (qos > 0) {
Serial.println(F("Reply:"));
len = readPacket(buffer, 4, PUBLISH_TIMEOUT_MS);
for (uint8_t i=0; i<len; i++) {
Serial.write(buffer[i]); Serial.print(" [0x"); Serial.print(buffer[i], HEX); Serial.print("], ");
}
Serial.println();
#ifdef DEBUG_MQTT_PUBLISH
Serial.print(F("Reply:\t")); printBuffer(buffer, len);
#endif
return true;
} else {
return true;
}
}
boolean Adafruit_MQTT_CC3000::subscribe(Adafruit_MQTT_Subscribe *sub) {
uint8_t i;
// see if we are already subscribed
for (i=0; i<MAXSUBSCRIPTIONS; i++) {
if (subscriptions[i] == sub) {
#ifdef DEBUG_MQTT_SUBSCRIBE
Serial.println(F("Already subscribed"));
#endif
break;
}
}
if (i==MAXSUBSCRIPTIONS) { // add to subscriptionlist
for (i=0; i<MAXSUBSCRIPTIONS; i++) {
if (subscriptions[i] == 0) {
#ifdef DEBUG_MQTT_SUBSCRIBE
Serial.print(F("Added sub ")); Serial.println(i);
#endif
subscriptions[i] = sub;
break;
}
}
}
if (i==MAXSUBSCRIPTIONS) {
#ifdef DEBUG_MQTT_SUBSCRIBE
Serial.println(F("no more space :("));
#endif
return false;
}
}
Adafruit_MQTT_Subscribe *Adafruit_MQTT_CC3000::readSubscription(int16_t timeout) {
uint8_t i, topiclen, datalen;
#ifdef DEBUG_MQTT_READSUB
Serial.println(F("reading..."));
#endif
uint16_t len = readPacket(buffer, MAXBUFFERSIZE, timeout, true); // return one full packet
#ifdef DEBUG_MQTT_READSUB
printBuffer(buffer, len);
#endif
if (!len) return NULL;
topiclen = buffer[3];
#ifdef DEBUG_MQTT_READSUB
Serial.print(F("Looking for subscription len ")); Serial.println(topiclen);
#endif
// figure out what subscription this is!
for (i=0; i<MAXSUBSCRIPTIONS; i++) {
if (subscriptions[i]) {
//Serial.print(i);
boolean flag = true;
// TODO: REPLACE WITH MEMCMP?
for (uint8_t k=0; k<topiclen; k++) {
if ( buffer[4+k] != pgm_read_byte(subscriptions[i]->topic+k) )
flag = false;
}
if (flag) {
#ifdef DEBUG_MQTT_READSUB
Serial.println((char *)buffer+4);
Serial.print(F("Found sub #")); Serial.println(i);
#endif
break;
}
}
}
if (i==MAXSUBSCRIPTIONS) return NULL; // matching sub not found ???
// zero out the old data
memset(subscriptions[i]->lastread, 0, SUBSCRIPTIONDATALEN);
datalen = len - topiclen - 4;
if (datalen > SUBSCRIPTIONDATALEN) {
datalen = SUBSCRIPTIONDATALEN-1; // cut it off
}
// extract out just the data, into the subscription object itself
memcpy(subscriptions[i]->lastread, buffer+4+topiclen, datalen);
#ifdef DEBUG_MQTT_READSUB
Serial.print(F("Data len: ")); Serial.println(datalen);
Serial.print("Data: "); Serial.println((char *)subscriptions[i]->lastread);
#endif
// return the valid matching subscription
return subscriptions[i];
}

10
Adafruit_MQTT_CC3000.h
View File

@ -6,16 +6,24 @@
#include "Adafruit_MQTT_CC3000.h"
#include <Adafruit_CC3000.h>
// delay in ms between calls of available()
#define MQTT_CC3000_INTERAVAILDELAY 10
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);
int8_t connect(void);
uint16_t readPacket(uint8_t *buffer, uint8_t maxlen, int16_t timeout);
uint16_t readPacket(uint8_t *buffer, uint8_t maxlen, int16_t timeout, boolean checkForValidPubPacket = false);
int32_t close(void);
boolean publish(const char *topic, char *payload, uint8_t qos);
boolean ping(uint8_t time);
boolean subscribe(Adafruit_MQTT_Subscribe *sub);
Adafruit_MQTT_Subscribe *readSubscription(int16_t timeout=0);
private:
Adafruit_CC3000 *cc3000;
Adafruit_CC3000_Client mqttclient;