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Ivy5661 Wi-Fi and Bluetooth IoT Solution - SoC SPRD UWP5661 Cortex-M4

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  The IVY5661, measured only 6cm x 3cm, is a micro-development board manufactured by uCRobotics. IVY5661 follows the Linaro 96boards IoT hardware design specification.

  • Utilizing the 28nm UniSoC UWP5661 SoC embedded with ARM Cortex-M4 CPU with a frequency range of 416MHz.
  • Built-in 32Mbit storage space
  • Supports Wi-Fi IEEE 802.11ac 2x2 and Bluetooth 5.
  • High-capacity storage and rich RF capabilities help users develop more complex and diverse IoT software.

Zephyr supported

When it comes to software issues that developers are most concerned about, IVY5661 supports the Zephyr operating system. We all know that Zephyr is a real-time operating system for IoT devices from the Linux Foundation. Zephyr's strengths are not only that it is born, but also that it
1. supports modularity: you can use the native Zephyr RTOS, or you can customize your own solution.
2. Improve the integrated communication protocol stack, including device-to-device connections. The Zephyr team has joined the networking capabilities. The low-power Bluetooth (BLE) implementation was written from the ground up, and the IP protocol stack in the open source Contiki RTOS was ported to support IPv6, including low-power 6LoWPAN. Thanks to Zephyr's comprehensive network protocol stack support, the IVY5661's dual-mode RF solution is being leveraged.
3. Security: A Zephyr image can only be run as a single application, statically linked at compile time, and run in a single address space. Dynamically loaded modules are not supported, which greatly reduces malware attacks.
4. Zephyr offers a wide range of services: multi-threaded services, interrupt services, synchronization between threads, data transfer services between threads, power management services, and more.
5. Lightweight: The size of the Zephyr program of IVY5661 is less than 200kb. The memory usage is low.
6. Real-time: The advantage of the real-time operating system compared to the traditional operating system is self-evident, and the application direction is also an area where the data transmission speed is relatively high, which cannot be applied by the traditional operating system.
7. Community Support: Zephyr is an open source system sponsored by the Linux Foundation. Community support is perfect.



  • First 28 nm IEEE 802.11ac 2x2 and Bluetooth 5 combo MCU chip, built-in 416 MHz ARM Cortex-M4 application processor, high throughput, low power consumption characteristics;
  • Support Wi-Fi 802.11ac 2x2 dual band with the co-processor, MU-MIMO Rx, 80MHz bandwidth up to 866Mbps PHY data rate, repeater mode, RTT indoor positioning, easy connect, easy mesh and data element features;
  • Support Bluetooth 5 with high power mode, BT mesh, and AOD indoor positioning features;
  •  Used intelligent household, IP camera, repeater Wi-Fi amplifier, high-fidelity audio system, and other networking applications.


Zephyr Support

The Zephyr Project is a scalable real-time operating system (RTOS) supporting multiple hardware architectures, optimized for resource-constrained devices, and built with security in mind.




[email protected]


ARM Cortex-M4 Daul Core

Clock freq





IEEE802.11ac 2x2


Bluetooth 5


2 x MicroUSB

Expansion Interface



4 user LED


2 Reset and User button

Power Source

Micro USB

OS Support



60 x 30mm



Open Source

Open Source hardware -

Open Source Software - Zephyr Project

Maintained on  -




96Boards Forum

Slack Channel

Contact with uCRobotics


Part List

1 x Ivy5661 Board

2 x Antenna





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