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mirror of https://github.com/adafruit/Adafruit_MQTT_Library.git synced 2025-07-08 14:01:58 +03:00

settable keepalive interval

This commit is contained in:
brentru
2021-05-18 16:41:26 -04:00
parent ea2fb46de3
commit a1e64c039e
3 changed files with 31 additions and 4 deletions

View File

@ -132,6 +132,8 @@ Adafruit_MQTT::Adafruit_MQTT(const char *server, uint16_t port, const char *cid,
will_qos = 0;
will_retain = 0;
keepAliveInterval = MQTT_CONN_KEEPALIVE;
packet_id_counter = 0;
}
@ -153,6 +155,8 @@ Adafruit_MQTT::Adafruit_MQTT(const char *server, uint16_t port,
will_qos = 0;
will_retain = 0;
keepAliveInterval = MQTT_CONN_KEEPALIVE;
packet_id_counter = 0;
}
@ -384,6 +388,25 @@ bool Adafruit_MQTT::will(const char *topic, const char *payload, uint8_t qos,
return true;
}
/**************************************************************************/
/*!
@brief Sets the connect packet's KeepAlive Interval, in seconds. This
function MUST be called prior to connect().
@param keepAlive
Maximum amount of time without communication between the
client and the MQTT broker, in seconds.
@returns True if called prior to connect(), False otherwise.
*/
/**************************************************************************/
bool Adafruit_MQTT::setKeepAliveInterval(uint16_t keepAlive) {
if (connected()) {
DEBUG_PRINT(F("keepAlive defined after connection established."));
return false;
}
keepAliveInterval = keepAlive;
return true;
}
bool Adafruit_MQTT::subscribe(Adafruit_MQTT_Subscribe *sub) {
uint8_t i;
// see if we are already subscribed
@ -649,9 +672,9 @@ uint8_t Adafruit_MQTT::connectPacket(uint8_t *packet) {
p[0] |= MQTT_CONN_PASSWORDFLAG;
p++;
p[0] = MQTT_CONN_KEEPALIVE >> 8;
p[0] = keepAliveInterval >> 8;
p++;
p[0] = MQTT_CONN_KEEPALIVE & 0xFF;
p[0] = keepAliveInterval & 0xFF;
p++;
if (MQTT_PROTOCOL_LEVEL == 3) {