The growing popularity of **ESP32** boards has led to an influx of innovative devices that perform specific tasks exceptionally well. These affordable gadgets, often costing significantly less than their commercial counterparts, allow for greater control and enhanced privacy through customizable firmware. The following devices stand out for their unique features and affordability, catering to tech enthusiasts willing to explore their capabilities.
ReSpeaker Lite: Transform Your Audio Experience
The **ReSpeaker Lite**, priced at **$32**, is an audio kit from **Seeed Studio**. It features a dual-microphone array that can convert standard speakers into smart ones. By flashing the firmware of the **Home Assistant Voice Preview Edition** and pairing it with **ESPHome**, users can enable wakeword support and hands-free control. For those seeking enhanced functionality, the **ReSpeaker XVF3800** model, available for **$60**, offers a superior four-microphone array for improved voice recognition, reducing the need to repeat commands.
M5Stack Atom Echo: Compact Voice Assistant
For a more compact solution, the **M5Stack Atom Echo** is available for just **$14**. This device comes with a built-in microphone and speaker, designed as a satellite node for DIY voice assistant systems. It can handle wake-word detection locally or connect to the **Home Assistant Voice pipeline** for private voice assistance. Additionally, it functions as a Bluetooth proxy, managing local **Bluetooth Low Energy** devices seamlessly.
ESP32 Cheap Yellow Display: Versatile Display Options
At approximately **$20**, the **ESP32 Cheap Yellow Display** (CYD) serves as an entry-level, multifunctional screen. Its compact design makes it suitable for various applications, such as a **Now Playing** display or a **Home Assistant** dashboard. For the adventurous, it can be programmed into a pocket-sized weather station or transformed into a lightweight network analysis tool by using the **ESP32 Marauder firmware**.
WT32-SC01 Plus: Affordable Touchscreen Dashboard
The **WT32-SC01 Plus**, priced at **$26**, offers a touchscreen experience without the hefty price tag of premium devices. Ideal for PC dashboards or home server monitoring, it allows users to control applications easily. The touch functionality enables quick access to various commands, making it a practical tool for enhancing productivity without the distraction of switching between applications.
Elecrow Rotary Display: A Unique Control Interface
Available in two sizes, **Elecrow’s Rotary Display** features 1.28-inch and 2.1-inch variants, priced at **$29** and **$36**, respectively. This device uniquely combines a round touchscreen with a clickable rotary knob, making it ideal for smart home automation, media control, or as a creative tool on computers. Users can design custom interfaces with the **LGVL graphics library** or **Squareline Studio** and deploy them via **Arduino** or **PlatformIO**, turning it into a compact controller for tasks like photo or audio editing.
reTerminal E1001 and E1002: ePaper Displays for Productivity
The **reTerminal** series consists of two **ESP32**-based ePaper displays: the monochrome **E1001** priced at **$79** and the color **E1002** at **$109**. These devices include buttons, a microphone, a buzzer, and sensors for temperature and humidity. While they may not replace a Kindle, they can function as basic eReaders for RSS feeds or articles. Additionally, they can serve as productivity dashboards or ambient information displays when not in use, functioning as minimalist e-art frames.
Elecrow CrowPanel: A Privacy-Friendly Smart Display
The **Elecrow CrowPanel**, available for **$60**, offers a compelling alternative to mainstream smart displays like the **Google Nest Hub**. Powered by an **ESP32-S3 chip**, it supports custom firmware compatible with **ESPHome**, allowing for integration with **Home Assistant**. Users will need to connect an external speaker and engage in some setup to fully utilize its capabilities. Beyond being a smart display, it can be repurposed for various creative applications, such as a photo frame or mini arcade machine.
Affordable **ESP32** devices offer users a chance to creatively engage with technology without breaking the bank. Each device excels in its specific function, making them excellent choices for DIY enthusiasts looking to build their own smart home tools or productivity aids. Whether developing a weather station or a custom display, these devices provide accessible options for anyone interested in technology.