dotnet/MQTTnet

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MQTTnet is a high performance .NET library for MQTT based communication. It provides a MQTT client and a MQTT server (broker). The implementation is based on the documentation from http://mqtt.org/.

Stars: 5.1k
Forks: 1.2k
Open beginner issues: 0
Indexed issues: 168

Dominant language: C#
License: MIT
Last GitHub push: Aug 9, 2026
Latest indexed: Sep 15, 2026
Contributing guide: No contributing guide
Code of conduct: Code of conduct
Beginner labels: No beginner labels indexed
PR merge metrics: No merged PRs in 30d

Open All

168 open issues indexed

Client side delivery guarantee (QoS 1 or 2) Open

feature-request

dotnet/MQTTnet#374 · 11 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Version 5.0 Authentication Examples Open

documentation

dotnet/MQTTnet#641 · 11 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Validate client certificate in the broker Open

feature-request support

dotnet/MQTTnet#644 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Is there a way to get properities from the TLS sessions? Open

feature-request question

dotnet/MQTTnet#658 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Decouple connection middleware from MQTTnet.AspnetCore Open

feature-request

dotnet/MQTTnet#756 · 7 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Mutual authentication with tls Open

documentation question

dotnet/MQTTnet#757 · 17 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Clustered Connections Open

feature-request

dotnet/MQTTnet#764 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
MQTTNet hung during call to ManagedMQTTClient.Dispose() Open

bug managed-client

dotnet/MQTTnet#765 · 12 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Durable session store Open

question

dotnet/MQTTnet#806 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Load Balancing With Shared Subscriptions - MQTT Client Open

feature-request

dotnet/MQTTnet#821 · 11 comments · 18 reactions · 0 assignees · Indexed Sep 15, 2026
Certificate-Weakening TlsOptions have no effect on web socket connections Open

bug documentation

dotnet/MQTTnet#858 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
CleanSession==false not working Open

managed-client question

dotnet/MQTTnet#913 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Support streams when sending and/or receiving Open

feature-request

dotnet/MQTTnet#939 · 18 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Question: how to get notified of puback for QoS1 on the client Open

question

dotnet/MQTTnet#944 · 9 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
X-Forward-For header is not rewriting endpoint address when ASP.NET core 3.1 is behind a reverse proxy Open

bug

dotnet/MQTTnet#1000 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Problems with QoS > 0 Open

question

dotnet/MQTTnet#1089 · 8 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
How do you use WithClientCertificate with secure websockets (wss) as a server? Open

question

dotnet/MQTTnet#1117 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
MqttCommunicationTimedOutException when connecting Open

bug

dotnet/MQTTnet#1140 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Auth Packet support in Server?? Open

question

dotnet/MQTTnet#1144 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Connection to mosquitto using tls1.3 with only ca.crt Open

question

dotnet/MQTTnet#1150 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
IManagedMqttClientStorage passed all message after each add/remove Open

bug

dotnet/MQTTnet#1157 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
[Question] How to use cert.pem on MQTTClient side ? Open

question

dotnet/MQTTnet#1164 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Handle all messages before server shutdown Open

question

dotnet/MQTTnet#1165 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Send client and root CA certificate Open

question

dotnet/MQTTnet#1175 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
asp.net core 5 StartedHandler is not working Open

bug

dotnet/MQTTnet#1190 · 1 comment · 3 reactions · 0 assignees · Indexed Sep 15, 2026
MQTT over QUIC Open

feature-request

dotnet/MQTTnet#1195 · 8 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
WebSocket .NET 5.0 connection and publish issues Open

question

dotnet/MQTTnet#1197 · 7 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Store pending messages on broker's side Open

dotnet/MQTTnet#1208 · 10 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
ASP.NET Core 3.1 hosted service may fail silently Open

bug

dotnet/MQTTnet#1237 · 3 comments · 1 reaction · 0 assignees · Indexed Sep 15, 2026
How to know when the ManagedMqttClient is subscribed? Open

question

dotnet/MQTTnet#1265 · 12 comments · 5 reactions · 0 assignees · Indexed Sep 15, 2026
MQTTnet.Server's WithEncryptedEndpointBoundIPAddress() Fails Silently Open

bug

dotnet/MQTTnet#1272 · 1 comment · 1 reaction · 0 assignees · Indexed Sep 15, 2026
Retain the `IMqttRetainedMessagesManager` interface in version 4? Open

feature-request

dotnet/MQTTnet#1286 · 7 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Configure reliable messaging / acknowledge on QoS >=1 Open

question

dotnet/MQTTnet#1303 · 1 comment · 1 reaction · 0 assignees · Indexed Sep 15, 2026
Access to Client Outbound Publishing queue Open

question

dotnet/MQTTnet#1343 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Clients do not receive disconnect signal Open

bug

dotnet/MQTTnet#1411 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
ManagedMqttClient Open

bug

dotnet/MQTTnet#1424 · 38 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Please add the supported QoS level of the library in the readme Open

bug

dotnet/MQTTnet#1425 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Retained message is not removed after expiry interval expired Open

feature-request

dotnet/MQTTnet#1437 · 6 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
ManagedClient, whether the definition of data sources is supported Open

managed-client question

dotnet/MQTTnet#1509 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Connect to broker using CA Cert ClientCert and Key Open

question

dotnet/MQTTnet#1522 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Problem with Hosted mqtt server via WebApplicationFactory Open

question

dotnet/MQTTnet#1525 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
ManagedClient CleanSession=false V4 Open

bug

dotnet/MQTTnet#1535 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Server broadcasting duplicate message before receiving PUBREL (V3.1.1)? Open

question

dotnet/MQTTnet#1540 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Use MqttClientDefaultCertificateValidationHandler.Handle() by default Open

feature-request

dotnet/MQTTnet#1547 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Add access to MqttClientPublishResult for managed client Open

feature-request

dotnet/MQTTnet#1572 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
ManagedMqttClient.SubscribeAsync With delay Open

bug

dotnet/MQTTnet#1573 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
`AddressAlreadyInUse` when using `WithDefaultEndPoint` but server starts anyway. Open

bug

dotnet/MQTTnet#1579 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
V4: Mock Raise DisconnectedAsync Open

question

dotnet/MQTTnet#1608 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Allow passing disconnect reason to MqttClientStatus.DisconnectAsync Open

feature-request

dotnet/MQTTnet#1614 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Support more auto reconnect policy Open

feature-request

dotnet/MQTTnet#1617 · 0 comments · 3 reactions · 0 assignees · Indexed Sep 15, 2026

dotnet/MQTTnet

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