W5500 MQTT 예제 오류 질문
Ethernet Chips
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RE: W5500 MQTT 예제 오류 질문
by Eugeny ·
search for
mqtt_transport_yieldgives no results. You must look into the source you have to identify the cause of the error. MQTT 3.1.1 defines connect error 4 as “Connection rejected for damaged username or password - The data in the username or password is in the wrong format”, or it may just happen that connection was dropped.