diff --git a/Adafruit_MQTT.cpp b/Adafruit_MQTT.cpp index ae7b062..3721333 100644 --- a/Adafruit_MQTT.cpp +++ b/Adafruit_MQTT.cpp @@ -325,20 +325,21 @@ Adafruit_MQTT_Subscribe *Adafruit_MQTT::readSubscription(int16_t timeout) { return subscriptions[i]; } -bool Adafruit_MQTT::ping() { - - // Construct and send ping packet. - uint8_t len = pingPacket(buffer); - if (!sendPacket(buffer, len)) - return false; - - // Process ping reply. - len = readPacket(buffer, 2, PING_TIMEOUT_MS); - if (buffer[0] == (MQTT_CTRL_PINGRESP << 4)) - return true; +bool Adafruit_MQTT::ping(uint8_t num = 1) { + while (num--) { + // Construct and send ping packet. + uint8_t len = pingPacket(buffer); + if (!sendPacket(buffer, len)) + return false; + + // Process ping reply. + len = readPacket(buffer, 2, PING_TIMEOUT_MS); + if (buffer[0] == (MQTT_CTRL_PINGRESP << 4)) + return true; + } + return false; - } // Packet Generation Functions ///////////////////////////////////////////////// diff --git a/Adafruit_MQTT.h b/Adafruit_MQTT.h index eaed311..e88735a 100644 --- a/Adafruit_MQTT.h +++ b/Adafruit_MQTT.h @@ -169,7 +169,7 @@ class Adafruit_MQTT { Adafruit_MQTT_Subscribe *readSubscription(int16_t timeout=0); // Ping the server to ensure the connection is still alive. - bool ping(); + bool ping(uint8_t n); protected: // Interface that subclasses need to implement: