This post covers the guts of how the ULP works and will equip you to resolve issues when they arise. What We’ll Cover What processor architecture is used How your ULP application compiled W...

Putting the main CPU in deep sleep, waking it from the ULP and properly handling the wakeup cause. Wake Up, Sleepy Head A primary reason for using the ULP in the first place is for low power appl...

Getting Setup This repo takes a Docker-first approach and assumes you are on Linux. It can definitely work on Windows but container development is pretty cumbersome there. If you are on Windows j...

A deep dive on the nuts and bolts operation of the RISC-V ULP coprocessor on the ESP32. After running into some issues working with the ULP on the ESP32 I was inspired to crawl very deep down the ...

Espressif has released v5.3.1 as the latest stable release of IDF. The full changelog can be found here: https://github.com/espressif/esp-idf/releases/tag/v5.3.1 Notable Changes Despite being ch...

If you need to use the ESP32 as an I2C slave device please read this post first. It will save you a lot of pain and troubleshooting. If you only use the ESP32 as an I2C master, this article doe...

Previously, we covered how to achieve perfect forward secrecy guarantees in your ESP32 projects. However, even when we did that, our TLS client on the ESP32 sent cipher suites to the server that a...

The default configuration of an ESP32 project does not guarantee perfect forward secrecy(PFS) of your TLS communication. In this post we’ll cover what forward secrecy is, why you should care about ...

What is sdkconfig? Every ESP32 project has a main configuration file called sdkconfig. This file contains every configuration setting for your project. It is typically not edited by hand although ...

The recent announcement that the Mbed platform and OS are being sunset has many people wondering what the implications are. Here’s what you need to know for your ESP32 projects. Mbed OS != Mbed TL...