ONLINE HELP
 WINDEVWEBDEV AND WINDEV MOBILE

Help / WLanguage / WLanguage functions / Communication / MQTT functions
WINDEV
WindowsLinuxJavaReports and QueriesUser code (UMC)
WEBDEV
WindowsLinuxPHPWEBDEV - Browser code
WINDEV Mobile
AndroidAndroid Widget iPhone/iPadIOS WidgetApple WatchMac Catalyst
Others
Stored procedures
ConstantDescriptionUsed by the functions
mqttIgnoreExpiredCertificateThe certificate date is ignored.mqttSession variable
mqttIgnoreInvalidCertificateThe certificate is ignored.mqttSession variable
mqttIgnoreInvalidCertificateNameThe site name specified in the certificate is ignored.mqttSession variable
mqttIgnoreRevocationThe certificate revocation is ignored.mqttSession variable
mqttQualityAtLeastOnceThe message will be delivered at least once. The client will transmit the message several times if necessary until the server (broker) confirms that the message was transmitted on the network.MQTTSubscribe, MQTTPublish
mqttQualityAtMostOnceThe message will be delivered once at most. The message is not stored. It is sent without guarantee of receipt. The MQTT (broker) does not inform the sender that the message was received. The message can be lost if the client is disconnected or if the server is stopped.MQTTSubscribe, MQTTPublish
mqttQualityExactlyOnceThe message will be necessarily saved by the issuer. It will be transmitted as long as the receiver does not confirm its sending on the network. The issuer uses a sophisticated recognition with the server (broker) to avoid duplicating messages. This mode is slower but it is more secure.MQTTSubscribe, MQTTPublish
Minimum version required
  • Version 22
This page is also available for…
Comments
Click [Add] to post a comment

Last update: 09/24/2024

Send a report | Local help