Hi! I’m trying to implement a secure MQTT Client connection with an ESP32 microcontroller. There is an HiveMQ example for the ESP8266 using the library “CertStoreBearSSL”, but unfortunately, this library seems the be not available for ESP32. Aer there any alternatives or other solutions?

Hi Ireshet, For Cloud, Clients(devices) will only need to trust the server root CA certificate. If it’s set up correctly then clients should always leverage the certificate chain and validate only against the root certificate. You can generate server root CA for your cloud instance and add it to tr…

Hello Harald, Great to see your interest in MQTT and HiveMQ! Check out this post with a learning video : Arduino example with server signed certificate - #9 by Chris . Please let me know, if that is helpful for your ESP32 project. Kind regards, Dasha from HiveMQ Team

Hi! It seems that the class “PubSubClient” has no member “setCACert”. So, how can I set the certificate of the root cert authority?

Can someone help? For esp8266. What kind of certificate can be used for mass production, it is very inconvenient to use a certificate that may suddenly expire and that needs to be renewed on the client’s device.

HiveMQ Certificate Store with ESP32

HiveMQ Client Library

indima December 8, 2021, 1:09pm 4

Sorry, the setCACert member function is part of the “WiFiClientSecure” class.

ESP32 not able to connect to HimeMQ cloud

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HiveMQ Certificate Store with ESP32

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