Esp32/Blynk/No

[RDx]

Hello! I want to create a project by connecting my esp32 to blynk dashboard and blynk to node red in which i want to publish and subscribe messages. How i can achieve that. need step by step guide for setting up node red and from where to get the certificate. Iam using arduino ide to perform all this

[PeteKnight]

@RDx

connecting my esp32 to blynk dashboard and blynk to node red

If you’re using Node-Red then the communication path should be…

ESP32 <—> Node-Red via MQTT
Node_Red <—> Blynk via the Blynk IoT contrib

@RDx

where to get the certificate

No certificate needed, just the Blynk Auth token which you get when creating a template then a device in Blynk.

I’d start by reading this topic from start to finish. It was originally written in relation to Blynk Legacy, but the later posts bring it up to date with Blynk IoT (but don’t skip straight to the end, it won’t make sense)…

My home automation projects built with MQTT and Node Red

I thought I’d start a topic about some of the home automation things I’m doing with Blynk. We live in London, England, and also have a holiday home in Spain where we spend around 4 months of the year. Most of my home automation projects are based in the Spanish home and are aimed at simplifying day-to-day life while we’re there. My wife is disabled, and finds new technology a bit of a challenge, so all the projects that I’ve created are aimed at being practical, easy to use and reliable. Lets …

@RDx

Iam using arduino ide to perform all this

You might be using Arduino IDE to write the MQTT sketch that runs on your ESP32, but the rest of the work will be done in the Blynk web console and mobile app, and in Node-Red.

Pete.

[Pavel]

Have you tried searching the docs:

Node-RED | Blynk Documentation