Omnimo nRF52840 IoT Development Board with Nordic nRF52840 SoC, Bluetooth 5.4, and Modular Expansion Support

The Omnimo nRF52840 is a compact development board designed for IoT prototyping and automation system integration. It is powered by the Nordic nRF52840 SoC, which features a 64 MHz Arm Cortex-M4 MCU with a floating-point unit (FPU), 1 MB Flash, and 256 KB RAM. The board supports Bluetooth 5.4, Bluetooth Mesh, NFC, Thread, Matter, and Zigbee through its 2.4 GHz radio. An additional 2 MB external QSPI flash enhances storage capacity.

The board provides 26 GPIOs and supports multiple expansion interfaces, including mikroBUS, Feather, Pmod, and Qwiic/Stemma QT. This allows compatibility with various add-on modules, making it suitable for various IoT applications. It also includes two programmable push buttons and LEDs for user interaction.

Designed for modular connectivity, the Omnimo nRF52840 condenses the features of larger development kits into a smaller form factor, slightly larger than the Adafruit Feather. Its pin and port layout enables seamless integration with over 2,000 available modules, making it a versatile option for embedded hardware development.

Omnimo nRF52840 IoT development board specifications:

• Processor & Wireless Connectivity
  • Nordic nRF52840 SoC (MDBT50Q-1MV2)
  • 64 MHz Arm Cortex-M4 processor with FPU
  • Multi-protocol 2.4 GHz radio: Bluetooth 5.4, Bluetooth Mesh, Thread, Matter, Zigbee, and proprietary protocols
• Memory & Storage
  • 1MB Flash, 256KB RAM
  • 2MB external QSPI Flash
• Interfaces & Peripherals
  • Communication interfaces: SPI, UART, I2C, I2S, USB
  • 12-bit, 200 ksps ADC with 8 channels
  • 4 PWM channels
  • ARM CryptoCell cryptographic unit
  • On-chip NFC-A tag for pairing and payment applications
  • 26 GPIO pins
  • 2 user buttons, 1 reset button
  • 2 user LEDs, 1 NeoPixel RGB LED
• Expansion & Module Sockets
  • Feather-compatible pinout (supports Adafruit FeatherWings)
  • mikroBUS socket (compatible with Click modules)
  • Pmod connector (supports Digilent Pmod modules)
  • Qwiic/Stemma QT connector (I2C expansion)
• Programming & Debugging
• • USB bootloader for firmware updates
  • SWD connector for debugging
  • Over-the-air (OTA) programming
• Power Management
  • 1.8V to 3.3V regulated output for external components
  • Battery connector supporting 3.7V–4.2V Li-Poly batteries
  • On-board 3.3V LDO regulator
  • Controllable LDO regulator for external modules
  • Side on/off switch
• Dimension: 68 mm x 25.4 mm (2.6″ x 1″)

The Omnimo nRF52840 stands out with its versatile pin headers and module sockets, supporting a wide range of expansion boards. It is compatible with Adafruit FeatherWings, mikroBUS Click modules, and Digilent Pmod modules, providing developers with flexibility. Additionally, it features a Qwiic/Stemma QT header, which can support Grove modules through an adapter. Similar to Adafruit Feather boards, it includes a LiPo battery header and an onboard battery charging controller for portable applications.

Designed for modular connectivity, the Omnimo nRF52840 integrates features typically found in larger development kits into a compact form factor, slightly larger than an Adafruit Feather. It is a fully open-source project, offering flexibility for embedded development and IoT applications.

The board supports development using Arduino IDE, CircuitPython, and the nRF Connect SDK, allowing seamless integration with IoT platforms such as Home Assistant. Below is a CircuitPython example demonstrating how to read temperature and humidity data from an HTU21D sensor over I2C:

import time
import board
import adafruit_htu21d

# Initialize the HTU21D temperature/humidity sensor
i2c = board.I2C()
sensor = adafruit_htu21d.HTU21D(i2c)

while True:
    print(f"Temperature: {sensor.temperature}°C")
    print(f"Humidity: {sensor.relative_humidity}%")
    time.sleep(2)

This example showcases how Omnimo nRF52840 simplifies sensor integration using CircuitPython, making it easy to prototype IoT and automation projects.

Previously, we covered several nRF52840-based development boards, carrier boards, and modules, including the NRF52840 Bluetooth 5 development board, MicroMod Weather Carrier Board, SGW1010 and SGW1011 modules, Blip, Makerdiary Pitaya Go, and nRF52840 Micro. Feel free to check them out if you’re interested in these products.

The company has not disclosed pricing details at the time of writing. However, the project will soon launch on Crowd Supply. For more information, visit the Crowd Supply product page.

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