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Tag: ESP32

How to use Mutex in ESP-IDF

Want to access critical resources from multiple threads in ESP32. Learn how to use Mutexes in IDF for achieving just that.

Published April 2, 2022
Categorized as ESP32 Tagged ESP32, idf, mutex, thread

ESP32 Arduino time operations

This article can act as a reference whenever you need to perform time operations on ESP32 in the Arduino IDE (bookmark it!).

Published March 28, 2022
Categorized as ESP32 Tagged arduino, ESP32, functions, operations, time

ESP32 – Free memory occupied by JSON objects

Observing your code running out of memory after a few iterations? Memory leaks caused by JSON objects might be the culprits. Learn how to fix them.

Published March 20, 2022
Categorized as ESP32 Tagged arduinojson, cjson, ESP32, json, leak, memory

How to discover ESP32 service over mDNS

Learn how to advertise services provided by your ESP32 over mDNS to facilitate discovery by other devices on the local network.

Published January 20, 2022
Categorized as ESP32 Tagged discovery, ESP32, mdns, service

ESP32 – Connect to best WiFi from multiple options

WiFiMulti in Action

In lab or in field, it is desirable to add multiple WiFi credentials to ESP32 and allow it to connect to the best option. Learn how to do that using WiFiMulti.

Published November 21, 2021
Categorized as ESP32 Tagged ESP32, wifimulti

How to connect ESP32 to AWS IoT Core

ESP32 to AWS

Learn detailed steps for connecting the ESP32 to AWS IoT Core. This article covers AWS setup, ESP32 setup, code walkthrough and testing.

Published October 20, 2021
Categorized as AWS, ESP32 Tagged aws, ESP32, esp32-cloud, iot, mqtt

Create Custom Watchdog Timer in ESP32

Learn about the concept of watchdog timers and also how to create your own custom watchdog timer in ESP32, using timer interrupts.

Published September 28, 2021
Categorized as ESP32 Tagged Custom, ESP32, Interrupts, timer, watchdog

Button (external) interrupts with ESP32

Learn how to configure external GPIO interrupts, or button interrupts, on ESP32. Includes concept, circuit diagram and code walkthrough.

Published September 19, 2021
Categorized as ESP32 Tagged button, ESP32, external, interrupt

ESP32 – Launch Captive Portal only if WiFi connect fails

You may want to use the captive portal during setup, to get SSID and password from the user, and not every time. Learn how to implement that in this tutorial.

Published August 24, 2021
Categorized as ESP32 Tagged captive, ESP32, portal, softap, station, wifi

How to disable brownout detector in ESP32 in Arduino

Learn how to disable the brownout detector in ESP32, when working with the Arduino IDE. This gets triggered when your ESP32 gets insufficient power.

Published August 22, 2021
Categorized as ESP32 Tagged brownout, detector, disable, ESP32

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