arduino/Adafruit_MQTT_Library
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callback support

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This commit is contained in:
ladyada
2016-07-08 17:01:40 -04:00
parent 9ed79466b2
commit 4269d87492
2 changed files with 83 additions and 17 deletions
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25
Adafruit_MQTT.h
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@ -30,7 +30,7 @@
#endif
// Uncomment/comment to turn on/off debug output messages.
#define MQTT_DEBUG
//#define MQTT_DEBUG
// Uncomment/comment to turn on/off error output messages.
#define MQTT_ERROR
@ -98,9 +98,12 @@
// eg max-subscription-payload-size
#define SUBSCRIPTIONDATALEN 20
//Function pointer called CallbackType that takes a float
//and returns an int
typedef void (*SubscribeCallbackType)(char *);
//Function pointer that returns an int
typedef void (*SubscribeCallbackUInt32Type)(uint32_t);
// returns a double
typedef void (*SubscribeCallbackDoubleType)(double);
// returns a chunk of raw data
typedef void (*SubscribeCallbackBufferType)(char *str, uint16_t len);
extern void printBuffer(uint8_t *buffer, uint16_t len);
@ -186,6 +189,8 @@ class Adafruit_MQTT {
// that subscribe should be called first for each topic that receives messages!
Adafruit_MQTT_Subscribe *readSubscription(int16_t timeout=0);
void processPackets(int16_t timeout);
// Ping the server to ensure the connection is still alive.
bool ping(uint8_t n = 1);
@ -264,7 +269,9 @@ class Adafruit_MQTT_Subscribe {
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);
void setCallback(SubscribeCallbackType callb);
void setCallback(SubscribeCallbackUInt32Type callb);
void setCallback(SubscribeCallbackDoubleType callb);
void setCallback(SubscribeCallbackBufferType callb);
void removeCallback(void);
const char *topic;
@ -273,9 +280,13 @@ class Adafruit_MQTT_Subscribe {
uint8_t lastread[SUBSCRIPTIONDATALEN];
// Number valid bytes in lastread. Limited to SUBSCRIPTIONDATALEN-1 to
// ensure nul terminating lastread.
uint8_t datalen;
uint16_t datalen;
SubscribeCallbackUInt32Type callback_uint32t;
SubscribeCallbackDoubleType callback_double;
SubscribeCallbackBufferType callback_buffer;
private:
SubscribeCallbackType callback;
Adafruit_MQTT *mqtt;
};