Raspberry Pi RP2040 with 0.42 OLED Development Board RP2040-0.42LCD

01Space manufactures this Arduino, MicroPython, and CircuitPython-compatible ultra-compact development board.  Powered by a Raspberry Pi RP2040 microcontroller — and a display that's almost as small as the USB Type-C port that powers it: the RP2040-0.42LCD. The RP2040 features a dual-core Arm Cortex-M0+ processor clocked at 133MHz with 264KB internal SRAM [static RAM] and 2MB [external] flash storage.

The board itself features pins down either side for breadboard compatibility and a USB Type-C port to the top for data and power. Just beneath this is the aforementioned display, an ultra-compact glass panel, which is actually built on organic light-emitting diode (OLED) rather than liquid-crystal display (LCD) technology.

Elsewhere on the board are physical reset and boot-select buttons, a single RGB LED linked to the RP2040's GPIO2 general-purpose input/output (GPIO) pin, and a power indicator LED. A total of 11 of the RP2040's GPIO pins are brought out to physical pins, including access to all four analog to digital converters (ADCs), two SPI, two I2C, and one UART bus alongside regulated 3.3V, USB 5V, battery, and ground power pins — along with a bonus Qwiic/STEMMA QT connector on the underside for solder-free linking to external sensor boards.

 The board includes a Qwiic/STEMMA QT I2C header for easy expansion. 
 
For software compatibility, the board can be treated as a Raspberry Pi Pico — meaning there's support in both MicroPython and CircuitPython, or it can be used with the Arduino IDE using Earle Philhower's community Arduino core. For the latter, a selection of example programs — including one that loads and displays small animated GIFs on the single-color display is available

Features -

• Great for quickly buiding IoT and Display projects around the raspberry pi Pico
• Integrated Microcontroller, Display and USB Port for communication makes it easy and convinient for completing projects rather than integrating them induvidual components on your own
• SoC – Raspberry PI RP2040 dual-core Cortex-M0+ microcontroller at up to 125 MHz, with 264KB SRAM Storage – 2 MB SPI flash
• Display – 0.42-inch OLED
• USB – 1x USB Type-C port for power and programming
• Expansion Qwiic I2C connector
• 7-pin and 8-pin headers with up to 11x GPIOs, 2xSPI, 2x I2C, 4x ADC, 1x UART, 5V, 3.3V, VBAT, GND Misc Reset and Boot buttons
• RGB LED, power LED
• Power Supply 5V via USB-C port or Vin VBAT pin for battery input
• 3V regulator with 500mA peak output
• Dimensions – 23.5 x 18 mm
• Weight – About 2.5 grams