# Wi-Fi & Bluetooth FLM140D

## Summary
- 2.4GHz single band Wi-Fi 4 and BLE 5.2 module
- DIP form factor
- 17.91mm × 14.99mm × 2.8mm
- 0.83g
- Operating temperature: -40°C to +85°C

## Key features
- Wi-Fi 4 module, single band (2.4 GHz) Wi-Fi, 1 × 1 antenna
- BLE 5.2 and Wi-Fi pairing via Bluetooth
- Large memory – 256KB RAM, 2MB or 4MB flash
- Supports UART, GPIO, ADC and PWM interfaces
- PCB antenna
- High stability, high reliability and full compatibility

## Overview
FLM140D is a cutting-edge MCU Wi-Fi and Bluetooth module launched by Quectel. It boasts a high-performance processor with a frequency of up to 120MHz and supports IEEE 802.11b/g/n protocol and BLE 5.2. The module features built-in 256KB RAM, 2MB or 4MB flash, ensuring efficient performance. In addition, it complies with WPA-PSK, WPA2-PSK and WPA3-SAE security standards.

FLM140D is in a DIP form factor with an ultra-compact package size of 17.91mm × 14.99mm × 2.8 mm, which optimizes the size and cost for end-products and is compatible with diverse designs.

The FLM140D module supports multiple interfaces including UART, GPIO, ADC and PWM, and many low power consumption modes and keep-alive mechanisms, which provide flexibility and versatility for a range of applications, especially in smart homes and industrial IoT scenarios. Especially suitable for smart sockets and other small volume, high temperature IoT devices. The FLM140D module supports the QuecOpen® solution and has a compact protocol stack, allowing for efficient product development.

## Product Brochure
[Download Quectel_Product_Brochure_V8.6.pdf](https://www.quectel.com/content/uploads/2026/05/Quectel_Product_Brochure_V8.6.pdf)

## Documentation and resources
- **AT Commands Manual**
  - [Quectel_FC41D&FCM100D&FCM740D&FLMx40D_AT_Commands_Manual_V2.2](https://www.quectel.com/login/?redirect=https%3A%2F%2Fwww.quectel.com%2Fproduct%2Fwi-fi-bluetooth-flm140d%2F) (File Size: 1.76 MB)
- **Hardware Development Resources**
  - [Quectel_FLM140D_2D_Dimensions_V1.0](https://www.quectel.com/login/?redirect=https%3A%2F%2Fwww.quectel.com%2Fproduct%2Fwi-fi-bluetooth-flm140d%2F) (File Size: 123.74 KB)
  - [Quectel_FLM140D_3D_Dimensions_V1.0](https://www.quectel.com/login/?redirect=https%3A%2F%2Fwww.quectel.com%2Fproduct%2Fwi-fi-bluetooth-flm140d%2F) (File Size: 548.84 KB)
  - [Quectel_FLM140D_Footprint&Part_V1.0](https://www.quectel.com/login/?redirect=https%3A%2F%2Fwww.quectel.com%2Fproduct%2Fwi-fi-bluetooth-flm140d%2F) (File Size: 189.82 KB)
  - [Quectel_FLM140D_Hardware_Design_V1.0](https://www.quectel.com/login/?redirect=https%3A%2F%2Fwww.quectel.com%2Fproduct%2Fwi-fi-bluetooth-flm140d%2F) (File Size: 1.06 MB)

## Related products
### [YF0011KA Wi-Fi adhesive mount FPC + cable dipole embedded antenna](https://www.quectel.com/product/yf0011ka-wi-fi-bt-adhesive-mount-antenna/)
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### [YSAN026XX DC~6GHz RP SMA female to IPEX MHF1 cable with an o-ring](https://www.quectel.com/product/ysan026xx-antenna-cable-2/)
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### [YEBT002W1AM Wi-Fi terminal mount rubber monopole external antenna](https://www.quectel.com/product/yebt002w1am-wifi-terminal-mount-antenna/)
![YEBT002W1AM antenna](https://www.quectel.com/content/uploads/2024/09/YEBT002W1AM_1200x950.png)

### [QFlash_V8.0_EN](https://www.quectel.com/login/?redirect=https%3A%2F%2Fwww.quectel.com%2Fproduct%2Fwi-fi-bluetooth-flm140d%2F) — File Size: 326.70 MB

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