arduino/Adafruit_MQTT_Library
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properly process packets until you get the one you want (prep for callback w/good retain support)

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This commit is contained in:
ladyada
2016-02-08 23:36:25 -05:00
parent 79dd62468f
commit 8f595cdb95
2 changed files with 79 additions and 4 deletions
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12
Adafruit_MQTT.h
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@ -95,6 +95,9 @@
// eg max-subscription-payload-size
#define SUBSCRIPTIONDATALEN 20
//Function pointer called CallbackType that takes a float
//and returns an int
typedef void (*SubscribeCallbackType)(char *);
extern void printBuffer(uint8_t *buffer, uint8_t len);
@ -202,6 +205,11 @@ class Adafruit_MQTT {
virtual uint16_t readPacket(uint8_t *buffer, uint8_t maxlen, int16_t timeout,
bool checkForValidPubPacket = false) = 0;
// Read a full packet, keeping note of the correct length
uint16_t readFullPacket(uint8_t *buffer, uint16_t timeout);
// Properly process packets until you get to one you want
uint16_t processPacketsUntil(uint8_t *buffer, uint8_t waitforpackettype, uint16_t timeout);
// Shared state that subclasses can use:
const char *servername;
int16_t portnum;
@ -255,7 +263,8 @@ 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);
bool setCallback(void (*callback)(char *));
void setCallback(SubscribeCallbackType callb);
void removeCallback(void);
const char *topic;
uint8_t qos;
@ -265,6 +274,7 @@ class Adafruit_MQTT_Subscribe {
// ensure nul terminating lastread.
uint8_t datalen;
private:
SubscribeCallbackType callback;
Adafruit_MQTT *mqtt;
};