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Espressif – Evaluate your WIFI connected HMI Applications


Espressif has recently launched ESP32-S2-HMI-DevKit-1, which has been specifically designed for human-machine interfaces in smart-home automation controllers, smart speakers with display, smart alarm clocks, etc. It comes with a 4.3-inch, color LCD and a touch panel.

ESP32-S2-HMI-DevKit-1 is powered by the ESP32-S2-WROVER module, which supports a 4.3-inch LCD screen. The development board has a 1950 mAh rechargeable lithium battery and peripheral interfaces such as Prog & UART, SPI, TWAI, I2C, and an SD card. It supports various sensors, and such functions as audio playback and recording. In addition, its low-power performance increases the standby time of the device considerably. As such, ESP32-S2-HMI-DevKit-1 is truly cost-effective. Check the picture in the upper right for more details on interfaces and peripherals (remark: the 4.3″ display is on the backside and cannot be seen).

Additionally, this development kit supports rapid secondary development, since developers can take advantage of the kit’s various onboard resources and expansion interfaces, in order to develop various different functions.

Additionally, with ESP-IDF, applications can be quickly migrated to ESP32 or ESP32-S3 based modules. Just start now with the ESP32-S2 (WiFi only) and your are ready for an upgrade to the upcoming ESP32-S3 for applications that need more calculation power (ESP32-S3: Dual-Core, WiFi + BLE 5.0  radio).

ESP32-S2-HMI-DevKit-1 Specifications

  • Wireless module: ESP32-S2-WROVER module with ESP32-S2 Xtensa single-core 32-bit LX7 microprocessor, up to 240 MHz with 128 KB ROM, 320 KB SRAM, WiFi 4 connectivity, 4MB flash, 2MB PSRAM
  • Storage: Micro-SD card slot
  • Display: 4.3-inch display with 800×480 resolution, I2C capacitive touch panel
  • Display interface: 16-bit, 20 MHz, 8080 parallel communication
  • Audio: Audio amplifier, built-in microphone, speaker connector
  • USB: 1x USB-C OTG (DFU/CDC) port, 1x USB-C debug port
  • Expansion: SPI header, TWAI (2-wire automotive interface)/CAN header, I2C header, UART/Prog header
  • Sensors: 3-axis accelerometer, 3-axis gyroscope, ambient-light sensor, temperature and humidity sensors
  • Miscellaneous: Programmable RGB LEDs, wakeup and reset buttons, IR transmitter
  • Power Supply: 5V and 3.3V power headers
  • Battery: 1,950 mAh Li-ion battery

Additional Tools

To support HMI and GUI design Espressif offers its ESP-LCD solution. It is a multimedia smart-control solution for GUI applications. The solution is based on a smart-control panel that comprises ESP32-S2-HMI-DevKit-1 and a liquid-crystal display (LCD) with capacitive touch.

ESP-LCD is suitable for several smart-control scenarios involving, for example, smart alarm clocks, air-quality detectors, smart audio control, and smart-home interactive panels.

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