ESPHome adds early support for ESP32-S2, ESP32-S3, and ESP32-C3

Disclosure: This post contains affiliate links. If you click through and make a purchase, I will earn a commission, at no additional cost to you. Read my full disclosure here.

The ESPHome platform, a mainstay for the DIY smart home community, has taken a significant leap forward with its latest update. The introduction of support for the ESP32-S2, ESP32-S3, and the much-anticipated ESP32-C3 marks a new chapter for enthusiasts eager to push the boundaries of their home automation projects.


ESP-IDF can do what Arduino can't

This advancement comes courtesy of the integration of the ESP-IDF framework, Espressif's official IoT Development Framework tailored for the ESP32, ESP32-S, and ESP32-C SoC series. While the tried-and-true Arduino framework remains the go-to, the ESP-IDF brings with it the promise of enhanced capabilities and future growth. However, with this being an early adoption stage, there's an air of 'expect the unexpected' due to known issues that will surely multiply in the short term.

Why the hype around the ESP32-C3?

The ESP32-C3 is creating quite the stir, and rightfully so. Not only is it a doppelgänger for the ESP8266 in terms of pin compatibility, but it also brings to the table a potent mix of speed, efficiency, and Bluetooth capabilities. Its heart is a RISC-V processor, a beacon of the open-source hardware movement, offering a refreshing departure from licensing shackles.

The embrace of the ESP32-C3 by ESPHome signifies a seamless union of open-source software and hardware, a veritable dream scenario for the community.

Why the ESP32-C3 is better than the ESP8266

The ESP32-C3 is poised to eclipse the ESP8266 once it ascends to the throne of mass-production. Boasting a substantial 400 KiB of RAM and a 160 MHz RISC-V core, it makes a compelling case for the throne. To add to its charm, it's also a more power-efficient option according to Espressif.

The delights don't end there; the ESP32-C3 is also well-versed in Bluetooth 5.0, a step up from the ESP32's Bluetooth 4.2, offering faster connection speeds and a broader range. While the ESP32 has the upper hand with its dual-core processor and additional GPIO pins, the ESP32-C3's PWM capabilities and parallel I²S interface render it a formidable contender for controlling a wide array of devices, including those ever-popular non-smart LED strips.

Can ESPHome nodes benefit from an ESP32-S2 and ESP32-S3

When it comes to the ESPHome ecosystem, the ESP32-S2 and ESP32-S3 might not get as many pulses racing. The former is essentially an ESP32 minus a core and Bluetooth, whilst the latter is an ESP32 on steroids with a penchant for machine learning and the added bonus of Bluetooth 5.0 and copious amounts of rapid SRAM. Although impressive, these features are like bringing a sword to a pillow fight within the ESPHome realm.

ESP32-H2 and Zigbee/Matter support for ESPHome incoming?

Peering into the crystal ball, we see the ESP-IDF extending its warm welcome to the ESP32-H2. This newcomer isn't just about Wi-Fi and Bluetooth 5.0; it's also about embracing the Thread and Zigbee protocols, the sinew and bone of the much-touted Matter standard. With Espressif's seat at the Connectivity Standards Alliance table, it's clear they're not just playing the game – they're setting the rules.

Frequently asked questions

ESP-IDF stands for Espressif IoT Development Framework, which is the official development framework for the ESP32, ESP32-S, and ESP32-C series. It allows for enhanced capabilities and future growth for ESPHome through more advanced features than what the Arduino framework can offer.

The ESP32-C3 offers pin compatibility with the ESP8266 but adds a faster 160 MHz RISC-V core, 400 KiB of RAM, improved power efficiency, and Bluetooth 5.0 capabilities.

While the ESP32 has a dual-core processor and more GPIO pins, the ESP32-C3 is more power-efficient, has a single RISC-V core, and supports Bluetooth 5.0. It also has PWM capabilities and a parallel I²S interface, making it suitable for controlling a variety of devices.

The ESP32-S2 is seen as an ESP32 without a second core and Bluetooth, and the ESP32-S3 offers enhancements like machine learning support and Bluetooth 5.0. However, their advanced features may be considered overkill for typical ESPHome use cases.

A portrait photo oif Liam Alexander Colman, the author, creator, and owner of Home Assistant Guide wearing a suit.

About Liam Alexander Colman

is an experienced Home Assistant user who has been utilizing the platform for a variety of projects over an extended period. His journey began with a Raspberry Pi, which quickly grew to three Raspberry Pis and eventually a full-fledged server. Liam's current operating system of choice is Unraid, with Home Assistant comfortably running in a Docker container.
With a deep understanding of the intricacies of Home Assistant, Liam has an impressive setup, consisting of various Zigbee devices, and seamless integrations with existing products such as his Android TV box. For those interested in learning more about Liam's experience with Home Assistant, he shares his insights on how he first started using the platform and his subsequent journey.

Leave a comment

Share to...