ALLNET 4duino IoT WLAN Display White - ESP32 Module with White 4-Line Display

The ALLNET 4duino IoT WLAN Display White is a compact development board based on the ESP32-WROOM-32 module, featuring an integrated 20x4 character LCD with white characters on a blue background. Designed for IoT and wireless projects, it combines a powerful dual-core microcontroller with built-in Wi-Fi and Bluetooth connectivity, making it ideal for prototyping and educational applications.

Advantages

Integrated 20x4 character LCD for direct data display without external components. Dual-core ESP32 processor with up to 240 MHz clock speed ensures smooth performance. Built-in Wi-Fi 802.11 b/g/n and Bluetooth v4.2 (BR/EDR + BLE) enable versatile wireless communication. Multiple GPIOs, ADC, DAC, I2C, SPI, UART, PWM, hall sensor, and touch sensor provide extensive interfacing options. Powered via Micro USB (5V DC) with 3.3V logic, compatible with Arduino IDE and ESP-IDF.

Suitable for

• IoT and wireless projects requiring local display
• Education and learning platforms for microcontroller programming
• Microcontroller prototyping and evaluation
• Sensors and data capture applications

Key specifications

• Microcontroller: ESP32-WROOM-32 (Dual-core Tensilica Xtensa LX6, up to 240 MHz)
• Flash Memory: 4 MB
• SRAM: 520 KB
• Wireless: Wi-Fi 802.11 b/g/n, Bluetooth v4.2 BR/EDR + BLE
• Display: 20 characters x 4 lines, white on blue
• Programming Interface: Micro USB
• Power Supply: 5V DC via Micro USB
• Operating Voltage: 3.3V
• GPIO: Multiple programmable digital I/O, analog inputs, PWM
• Integrated Peripherals: ADC, DAC, I2C, SPI, UART, Hall Sensor, Touch Sensor

Recommendations

This board is perfect for makers and educators seeking a ready-to-use IoT development platform with an integrated display. Pair with sensors and actuators to build smart home devices, weather stations, or data loggers.