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Wi-Fi & Bluetooth FCM266D

  • Wi-Fi 6 and BLE 5.4 module
  • LCC form factor
  • 20.0mm × 18.0mm × 2.4mm
  • Approx. 1.23g
  • Operating temperature range: -40°C to +85°C
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Key features

  • Wi-Fi 6 module, single band (2.4GHz), 1×1 antenna
  • BLE 5.4 and Bluetooth-assisted Wi-Fi provisioning
  • Built-in 640KB SRAM and 4MB flash
  • Supports up to 21 GPIOs under the QuecOpen® solution, providing multiple peripheral interfaces
  • 1st generation RF coaxial connector, pin antenna interface, PCB antenna (optional)
  • Wide operating temperature range: -40°C to +85°C

Overview

The FCM266D is a cutting-edge MCU Wi-Fi and Bluetooth module launched by Quectel. It boasts a high-performance ARMv8-M Star MCU processor with a frequency of up to 240MHz and supports IEEE 802.11 b/g/n/ax protocol and BLE 5.4. The module features built-in 640KB SRAM and 4MB flash, ensuring efficient performance.

The module complies with WPA-PSK, WPA2-PSK and WPA3-SAE security standards, supports TRNG (True Random Number Generator) and AES/RSA/SHA/ECC encryption algorithm. The module is in LCC form factor with an ultracompact package size of 20.0mm x 18.0mm x 2.4mm, which optimizes the size and cost for end-products and is compatible with diverse designs.

The FCM266D supports UART, SPI, I2C, ADC, PWM interfaces by default, and supports SDIO interface in QuecOpen® solution, and many low power consumption modes and keep-alive mechanism, which provides flexibility and versatility for a range of applications, especially in smart homes and industrial IoT scenarios. Thanks to its high processor frequency and Wi-Fi 6 protocol, the module is particularly suitable for application scenarios such as photovoltaics and energy storage which require high-speed commands and low-latency data transmission.

The module supports QuecOpen® solution and standard AT commands, with a compact protocol, and can realize efficient product development for customers.

Browse our wide range of antennas – download our antenna brochure

Product Brochure

Quectel_Product_Brochure_V8.5_2026.pdf

Download

Documentation and resources

  • Quectel_FCM266D_Hardware_Design_V1.0

    2.03 MB

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