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Adafruit_MQTT_Library
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Merge pull request #3 from matthijskooijman/fixes 

Various fixes and improvements
This commit is contained in:
Todd Treece 2015-08-03 14:40:35 -04:00
parent d4e27c9b3f 3a1bef8318
commit 63493a0bfb
5 changed files with 92 additions and 57 deletions
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73
Adafruit_MQTT.cpp
View File

@ -38,6 +38,7 @@ void printBuffer(uint8_t *buffer, uint8_t len) {
DEBUG_PRINTER.println();
}
/* Not used now, but might be useful in the future
static uint8_t *stringprint(uint8_t *p, char *s) {
uint16_t len = strlen(s);
p[0] = len >> 8; p++;
@ -45,6 +46,7 @@ static uint8_t *stringprint(uint8_t *p, char *s) {
memcpy(p, s, len);
return p+len;
}
*/
static uint8_t *stringprint_P(uint8_t *p, const char *s, uint16_t maxlen=0) {
// If maxlen is specified (has a non-zero value) then use it as the maximum
@ -81,6 +83,20 @@ Adafruit_MQTT::Adafruit_MQTT(const char *server, uint16_t port, const char *cid,
}
}
Adafruit_MQTT::Adafruit_MQTT(const __FlashStringHelper *server, uint16_t port, const __FlashStringHelper *cid,
const __FlashStringHelper *user, const __FlashStringHelper *pass) {
servername = (const char *)server;
portnum = port;
clientid = (const char *)cid;
username = (const char *)user;
password = (const char *)pass;
for (uint8_t i=0; i<MAXSUBSCRIPTIONS; i++) {
subscriptions[i] = 0;
}
}
/*
Adafruit_MQTT::Adafruit_MQTT(char *server, uint16_t port, char *cid, char *user, char *pass) {
strncpy(servername, server, SERVERNAME_SIZE);
@ -140,7 +156,20 @@ int8_t Adafruit_MQTT::connect() {
return 0;
}
bool Adafruit_MQTT::publish(const char *topic, char *data, uint8_t qos) {
const __FlashStringHelper* Adafruit_MQTT::connectErrorString(int8_t code) {
switch (code) {
case 1: return F("Wrong protocol");
case 2: return F("ID rejected");
case 3: return F("Server unavail");
case 4: return F("Bad user/pass");
case 5: return F("Not authed");
case 6: return F("Failed to subscribe");
case -1: return F("Connection failed");
default: return F("Unknown error");
}
}
bool Adafruit_MQTT::publish(const char *topic, const char *data, uint8_t qos) {
// Construct and send publish packet.
uint8_t len = publishPacket(buffer, topic, data, qos);
if (!sendPacket(buffer, len))
@ -163,22 +192,21 @@ bool Adafruit_MQTT::subscribe(Adafruit_MQTT_Subscribe *sub) {
for (i=0; i<MAXSUBSCRIPTIONS; i++) {
if (subscriptions[i] == sub) {
DEBUG_PRINTLN(F("Already subscribed"));
break;
return true;
}
}
if (i==MAXSUBSCRIPTIONS) { // add to subscriptionlist
for (i=0; i<MAXSUBSCRIPTIONS; i++) {
if (subscriptions[i] == 0) {
DEBUG_PRINT(F("Added sub ")); DEBUG_PRINTLN(i);
subscriptions[i] = sub;
break;
}
}
}
if (i==MAXSUBSCRIPTIONS) {
DEBUG_PRINTLN(F("no more subscription space :("));
return false;
for (i=0; i<MAXSUBSCRIPTIONS; i++) {
if (subscriptions[i] == 0) {
DEBUG_PRINT(F("Added sub ")); DEBUG_PRINTLN(i);
subscriptions[i] = sub;
return true;
}
}
}
DEBUG_PRINTLN(F("no more subscription space :("));
return false;
}
Adafruit_MQTT_Subscribe *Adafruit_MQTT::readSubscription(int16_t timeout) {
@ -220,6 +248,7 @@ Adafruit_MQTT_Subscribe *Adafruit_MQTT::readSubscription(int16_t timeout) {
}
// extract out just the data, into the subscription object itself
memcpy(subscriptions[i]->lastread, buffer+4+topiclen, datalen);
subscriptions[i]->datalen = datalen;
DEBUG_PRINT(F("Data len: ")); DEBUG_PRINTLN(datalen);
DEBUG_PRINT(F("Data: ")); DEBUG_PRINTLN((char *)subscriptions[i]->lastread);
@ -294,7 +323,7 @@ uint8_t Adafruit_MQTT::connectPacket(uint8_t *packet) {
}
uint8_t Adafruit_MQTT::publishPacket(uint8_t *packet, const char *topic,
char *data, uint8_t qos) {
const char *data, uint8_t qos) {
uint8_t *p = packet;
uint16_t len;
@ -357,6 +386,13 @@ Adafruit_MQTT_Publish::Adafruit_MQTT_Publish(Adafruit_MQTT *mqttserver,
qos = q;
}
Adafruit_MQTT_Publish::Adafruit_MQTT_Publish(Adafruit_MQTT *mqttserver,
const __FlashStringHelper *feed, uint8_t q) {
mqtt = mqttserver;
topic = (const char *)feed;
qos = q;
}
bool Adafruit_MQTT_Publish::publish(int32_t i) {
char payload[18];
itoa(i, payload, 10);
@ -375,7 +411,7 @@ bool Adafruit_MQTT_Publish::publish(uint32_t i) {
return mqtt->publish(topic, payload, qos);
}
bool Adafruit_MQTT_Publish::publish(char *payload) {
bool Adafruit_MQTT_Publish::publish(const char *payload) {
return mqtt->publish(topic, payload, qos);
}
@ -388,3 +424,10 @@ Adafruit_MQTT_Subscribe::Adafruit_MQTT_Subscribe(Adafruit_MQTT *mqttserver,
topic = feed;
qos = q;
}
Adafruit_MQTT_Subscribe::Adafruit_MQTT_Subscribe(Adafruit_MQTT *mqttserver,
const __FlashStringHelper *feed, uint8_t q) {
mqtt = mqttserver;
topic = (const char *)feed;
qos = q;
}

32
Adafruit_MQTT.h
View File

@ -94,6 +94,8 @@ class Adafruit_MQTT {
public:
Adafruit_MQTT(const char *server, uint16_t port, const char *cid,
const char *user, const char *pass);
Adafruit_MQTT(const __FlashStringHelper *server, uint16_t port, const __FlashStringHelper *cid,
const __FlashStringHelper *user, const __FlashStringHelper *pass);
virtual ~Adafruit_MQTT() {}
// Connect to the MQTT server. Returns 0 on success, otherwise an error code
@ -105,8 +107,16 @@ class Adafruit_MQTT {
// 4 = Bad username or password
// 5 = Not authenticated
// 6 = Failed to subscribe
// Use connectErrorString() to get a printable string version of the
// error.
int8_t connect();
// Return a printable string version of the error code returned by
// connect(). This returns a __FlashStringHelper*, which points to a
// string stored in flash, but can be directly passed to e.g.
// Serial.println without any further processing.
const __FlashStringHelper* connectErrorString(int8_t code);
// Disconnect from the MQTT server. Returns true if disconnected, false
// otherwise.
virtual bool disconnect() = 0; // Subclasses need to fill this in!
@ -116,10 +126,17 @@ class Adafruit_MQTT {
// Publish a message to a topic using the specified QoS level. Returns true
// if the message was published, false otherwise.
bool publish(const char *topic, char *payload, uint8_t qos);
// The topic must be stored in PROGMEM. It can either be a
// char*, or a __FlashStringHelper* (the result of the F() macro).
bool publish(const char *topic, const char *payload, uint8_t qos = 0);
bool publish(const __FlashStringHelper *topic, const char *payload, uint8_t qos = 0) {
return publish((const char *)topic, payload, qos);
}
// Add a subscription to receive messages for a topic. Returns true if the
// subscription could be added, false otherwise.
// subscription could be added or was already present, false otherwise.
// Must be called before connect(), subscribing after the connection
// is made is not currently supported.
bool subscribe(Adafruit_MQTT_Subscribe *sub);
// Check if any subscriptions have new messages. Will return a reference to
@ -161,7 +178,7 @@ class Adafruit_MQTT {
// Functions to generate MQTT packets.
uint8_t connectPacket(uint8_t *packet);
uint8_t publishPacket(uint8_t *packet, const char *topic, char *payload, uint8_t qos);
uint8_t publishPacket(uint8_t *packet, const char *topic, const char *payload, uint8_t qos);
uint8_t subscribePacket(uint8_t *packet, const char *topic, uint8_t qos);
uint8_t pingPacket(uint8_t *packet);
};
@ -170,8 +187,9 @@ class Adafruit_MQTT {
class Adafruit_MQTT_Publish {
public:
Adafruit_MQTT_Publish(Adafruit_MQTT *mqttserver, const char *feed, uint8_t qos = 0);
Adafruit_MQTT_Publish(Adafruit_MQTT *mqttserver, const __FlashStringHelper *feed, uint8_t qos = 0);
bool publish(char *s);
bool publish(const char *s);
bool publish(double f, uint8_t precision=2); // Precision controls the minimum number of digits after decimal.
// This might be ignored and a higher precision value sent.
bool publish(int32_t i);
@ -186,13 +204,17 @@ private:
class Adafruit_MQTT_Subscribe {
public:
Adafruit_MQTT_Subscribe(Adafruit_MQTT *mqttserver, const char *feedname, uint8_t q=0);
Adafruit_MQTT_Subscribe(Adafruit_MQTT *mqttserver, const __FlashStringHelper *feedname, uint8_t q=0);
bool setCallback(void (*callback)(char *));
const char *topic;
uint8_t qos;
uint8_t * lastread[SUBSCRIPTIONDATALEN];
uint8_t lastread[SUBSCRIPTIONDATALEN];
// Number valid bytes in lastread. Limited to SUBSCRIPTIONDATALEN-1 to
// ensure nul terminating lastread.
uint8_t datalen;
private:
Adafruit_MQTT *mqtt;
};

15
examples/mqtt_cc3k/mqtt_cc3k.ino
View File

@ -121,7 +121,7 @@ void loop() {
// this is our 'wait for incoming subscription packets' busy subloop
Adafruit_MQTT_Subscribe *subscription;
while (subscription = mqtt.readSubscription(1000)) {
while ((subscription = mqtt.readSubscription(1000))) {
if (subscription == &onoffbutton) {
Serial.print(F("Got: "));
Serial.println((char *)onoffbutton.lastread);
@ -152,18 +152,9 @@ void MQTT_connect() {
Serial.print("Connecting to MQTT... ");
while ((ret = mqtt.connect()) != 0) { // connect will return 0 for connected
switch (ret) {
case 1: Serial.println("Wrong protocol"); break;
case 2: Serial.println("ID rejected"); break;
case 3: Serial.println("Server unavailable"); break;
case 4: Serial.println("Bad user/password"); break;
case 5: Serial.println("Not authenticated"); break;
case 6: Serial.println("Failed to subscribe"); break;
default:
Serial.println(F("Connection failed"));
Serial.println(mqtt.connectErrorString(ret));
if (ret < 0)
CC3000connect(WLAN_SSID, WLAN_PASS, WLAN_SECURITY); // y0w, lets connect to wifi again
break;
}
Serial.println("Retrying MQTT connection in 5 seconds...");
mqtt.disconnect();
delay(5000); // wait 5 seconds

14
examples/mqtt_esp8266/mqtt_esp8266.ino
View File

@ -104,7 +104,7 @@ void loop() {
// this is our 'wait for incoming subscription packets' busy subloop
Adafruit_MQTT_Subscribe *subscription;
while (subscription = mqtt.readSubscription(1000)) {
while ((subscription = mqtt.readSubscription(1000))) {
if (subscription == &onoffbutton) {
Serial.print(F("Got: "));
Serial.println((char *)onoffbutton.lastread);
@ -137,17 +137,7 @@ void MQTT_connect() {
Serial.print("Connecting to MQTT... ");
while ((ret = mqtt.connect()) != 0) { // connect will return 0 for connected
switch (ret) {
case 1: Serial.println("Wrong protocol"); break;
case 2: Serial.println("ID rejected"); break;
case 3: Serial.println("Server unavailable"); break;
case 4: Serial.println("Bad user/password"); break;
case 5: Serial.println("Not authenticated"); break;
case 6: Serial.println("Failed to subscribe"); break;
default: Serial.print("Couldn't connect to server, code: ");
Serial.println(ret);
break;
}
Serial.println(mqtt.connectErrorString(ret));
Serial.println("Retrying MQTT connection in 5 seconds...");
mqtt.disconnect();
delay(5000); // wait 5 seconds

15
examples/mqtt_fona/mqtt_fona.ino
View File

@ -122,18 +122,7 @@ void loop() {
Serial.println(F("Connecting to MQTT..."));
int8_t ret, retries = 5;
while (retries && (ret = mqtt.connect()) != 0) {
switch (ret) {
case 1: Serial.println(F("Wrong protocol")); break;
case 2: Serial.println(F("ID rejected")); break;
case 3: Serial.println(F("Server unavail")); break;
case 4: Serial.println(F("Bad user/pass")); break;
case 5: Serial.println(F("Not authed")); break;
case 6: Serial.println(F("Failed to subscribe")); break;
default: {
Serial.println(F("Connection failed"));
break;
}
}
Serial.println(mqtt.connectErrorString(ret));
Serial.println(F("Retrying MQTT connection"));
retries--;
if (retries == 0) halt("Resetting system");
@ -155,7 +144,7 @@ void loop() {
// this is our 'wait for incoming subscription packets' busy subloop
Adafruit_MQTT_Subscribe *subscription;
while (subscription = mqtt.readSubscription(5000)) {
while ((subscription = mqtt.readSubscription(5000))) {
if (subscription == &onoffbutton) {
Serial.print(F("Got: "));
Serial.println((char *)onoffbutton.lastread);