New UNIT-DualMCU-One Board Combines ESP32 and RP2040 for Enhanced IoT Applications

The UNIT-DualMCU-One board has been launched, integrating two powerful microcontrollers: the ESP32 and the RP2040. This innovative design combines the capabilities of these microcontrollers to facilitate the development of advanced Internet of Things (IoT) projects.

At the heart of this board are two ARM Cortex M0+ cores, clocked at 133 MHz, allowing for efficient processing and communication. The ESP32 microcontroller brings Bluetooth and Wi-Fi capabilities to the table, enabling wireless connectivity, while the RP2040 manages processing tasks. This arrangement allows for parallel task execution, leveraging the strengths of both microcontrollers and allowing for real-time interactions.

One of the standout features of the UNIT-DualMCU-One board is its compatibility with Arduino shields. The board mimics the form factor of an Arduino Uno, with GPIO headers positioned on either side, making it easy to attach various sensor and function shields that are widely available or designed for maker projects.

In addition to the microcontrollers, the board comes equipped with a microSD card slot connected to the ESP32, enhancing storage capabilities. The RP2040 accesses 2 MB of flash memory and both chips can be managed through a single USB-C interface, which also supports CAN (Controller Area Network) communication.

The design further includes additional connection options, such as I2C, SPI, UART, and PWM, with two JST-SH ports available for I2C and UART communications. These ports are compatible with STEMMA and QWIIC standards. Moreover, there is an integrated FPC-24P port on the underside of the board for accessing additional ESP32 pins.

Powering the board is straightforward; it can be supplied with up to 18 volts via a round connector. This voltage is regulated down to 5 volts for connected peripherals using an MP1482DS voltage regulator, and further down to 3.3 volts for the microcontrollers using an NCP1117ST33T3G voltage converter.

For developers and hobbyists, the UNIT-DualMCU-One board supports the Arduino IDE and is compatible with both MicroPython and CircuitPython. Detailed setup instructions are available on the manufacturer's wiki, alongside circuit diagrams accessible on GitHub.

This versatile board is available for purchase at a price of $15 through Tindie, making it an attractive option for those looking to explore the capabilities of the RP2040 in conjunction with the ESP32. For inspiration on projects utilizing the RP2040, readers may find ideas in articles detailing innovative applications such as keyboards with OLED displays.