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Small green circuit board with dual 18-pin headers, four Grove ports, AA battery holder, power button and NFC antenna

Seeed Studio

Seeed Studio NGW nRF52840 MDK Base Dock Modular Adapter

SKU CH-NE3T-JJ3X3

A Grove-compatible base dock for nRF52832 and nRF52840 development boards, powered by a single AA battery with 3.3 V output and NFC antenna

  • TypeSensors
  • Powers from single AA battery via step-up converter
  • 4 Grove connectors support UART I2C I2S PDM QDEC SPI ADC
  • NFC tag-A PCB antenna built in
  • 5 µA shutdown and 145 µA idle current
  • Compatible with nRF52832-MDK and nRF52840-MDK boards

Essential IoT Base Dock

The Seeed Studio NGW nRF52840 MDK Base Dock is a modular adapter designed for developers building Internet of Things applications with nRF52832-MDK or nRF52840-MDK boards. It provides a compact hardware platform that integrates power management and sensor connectivity in a 58mm x 54mm x 17mm form factor.

Upgrade from bare development boards

This dock replaces the need for custom power circuitry and wired sensor breakouts when moving from prototype to field-ready mesh networking nodes. The jump is worth it when you require battery-operated deployment with a latching power button, NFC tag-A antenna, and plug-and-play Grove sensor expansion without soldering.

Handles four Grove sensors and single-cell power

The board comfortably supports four simultaneous Grove modules via selectable UART, I2C, I2S, PDM, QDEC, SPI, and ADC lines while delivering 3.3V from a single AA cell through a synchronous step-up converter with 0.8V-to-4V input range. It runs out when the application demands more than the 145µA idle current budget or requires a power source beyond one AA battery.

Highlights

  • Powers from single AA battery via step-up converter
  • 4 Grove connectors support UART I2C I2S PDM QDEC SPI ADC
  • NFC tag-A PCB antenna built in
  • 5 µA shutdown and 145 µA idle current
  • Compatible with nRF52832-MDK and nRF52840-MDK boards

Specifications

TypeSensors

Questions about this item

What size are the dual 2x18 socket headers that connect the dock to the nRF52832-MDK and nRF52840-MDK boards?

The dock uses dual 2x18 socket headers that are compatible with both the nRF52832-MDK and nRF52840-MDK development boards for direct module attachment.

How do I install the Base Dock onto the development board using the included hardware?

Align the dual 2x18 socket headers with the development board pins, then secure the assembly using the four M3 screws and plastic spacers provided in the part list.

What maintenance will the AA battery power supply require over time?

The dock runs on a single AA battery with a step-up converter; you will need to replace the AA cell when the battery level sensing on AIN2 reports low voltage.

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