FGM842D Development Guide

2025-11-14

Module Overview

FGM842D 模块

FGM842D is a series of the cutting-edge MCU Wi-Fi and Bluetooth module launched by Quectel. It boasts a high-performance processor (ARM968) with a frequency of up to 160 MHz and supports IEEE 802.11b/g/n protocol and BLE 5.2. The module features built-in 288 KB RAM and 2 MB flash, ensuring efficient performance.

The module is in a LGA form factor with an ultra-compact package size, which optimizes the size and cost for end-products and is compatible with diverse designs.

The module complies with WPA-PSK, WPA2-PSK and WPA3-SAE security standards, supports TRNG (True Random Number Generator) and AES-128 encryption algorithm, and supports secure firmware and flash encryption.

The module supports UART and GPIO interfaces by default and supports SPI, I2C, ADC and PWM functions in QuecOpen® solution and many low power consumption modes and keep-alive mechanism, which provide flexibility and versatility for a range of applications, especially in smart homes and industrial IoT scenarios.

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

Key Features

  • Wi-Fi 4 module, single band (2.4 GHz) Wi-Fi, 1 x 1 antenna
  • Bluetooth Low Energy (BLE 5.2)
  • Built-in 288KB RAM and 2MB Flash
  • Supports up to 19 GPIOs for SPI, I2C, ADC, PWM interfaces in QuecOpen® solution
  • RF coaxial connector, pin antenna interface, PCB antenna (optional)
  • Wide operating temperature range: -40°C to +105°C
Feature FGM842D FGM842D-P
WLAN Protocol IEEE 802.11b/g/n IEEE 802.11b/g/n
Wi‑Fi Frequency Band 2.4 GHz 2.4 GHz
Wi‑Fi Modulation Mode DSSS / CCK / BPSK / QPSK / 16QAM / 64QAM DSSS / CCK / BPSK / QPSK / 16QAM / 64QAM
Wi‑Fi Operating Mode AP / STA AP / STA
Bluetooth Protocol BLE 5.2 BLE 5.2
Encryption WPA‑PSK / WPA2‑PSK / WPA3‑SAE / AES‑128 / TRNG WPA‑PSK / WPA2‑PSK / WPA3‑SAE / AES‑128 / TRNG
Internet Protocol IPv4, IPv6 IPv4, IPv6
Kernel ARM968 (up to 160 MHz) ARM968 (up to 160 MHz)
RAM 288 KB 288 KB
Flash 2 MB 2 MB
Dimensions 12.5 mm × 13.2 mm × 1.8 mm 16.6 mm × 13.2 mm × 1.8 mm
Weight Approx. 1.05 g Approx. 1.14 g
Temperature Range
Operating Temperature -40 °C to +105 °C -40 °C to +105 °C
Storage Temperature -45 °C to +115 °C -45 °C to +115 °C
Certification
Regulatory Europe: CE
America: FCC
Canada: IC
China: SRRC
Australia / New Zealand: RCM		 Europe: CE
America: FCC
Canada: IC
China: SRRC
Australia / New Zealand: RCM
Interfaces
Main I/Os UART / GPIO / SPI / I2C / ADC / PWM UART / GPIO / SPI / I2C / ADC / PWM
Other Interfaces × 1 RF coaxial connector or pin antenna interface (optional) × 1 PCB antenna
Power Supply Voltage 3.0 V – 3.6 V, Typ. 3.3 V 3.0 V – 3.6 V, Typ. 3.3 V
Wi‑Fi Performance (2.4 GHz)
Mode FGM842D Receiver (Typ.) FGM842D Transmit (Typ.) FGM842D‑P Receiver (Typ.) FGM842D‑P Transmit (Typ.)
802.11b / 1 Mbps -98 dBm 18 dBm -98 dBm 18 dBm
802.11b / 11 Mbps -90 dBm 18 dBm -90 dBm 18 dBm
802.11g / 6 Mbps -90 dBm 16 dBm -90 dBm 16 dBm
802.11g / 54 Mbps -76 dBm 15 dBm -76 dBm 15 dBm
802.11n / HT20 MCS 0 -90 dBm 15 dBm -90 dBm 15 dBm
802.11n / HT20 MCS 7 -72 dBm 14 dBm -72 dBm 14 dBm
Bluetooth Performance
Mode FGM842D Receiver (Typ.) FGM842D Transmit (Typ.) FGM842D‑P Receiver (Typ.) FGM842D‑P Transmit (Typ.)
BLE (1 Mbps) -96 dBm 6 dBm -96 dBm 6 dBm
BLE (2 Mbps) -94 dBm 6 dBm -94 dBm 6 dBm
BLE (S = 2) -96 dBm 6 dBm -96 dBm 6 dBm
BLE (S = 8) -101 dBm 6 dBm -101 dBm 6 dBm
Model Ordering Code Dimensions Antenna Development Board (Only for Debugging)
FGM842D FGM842DAAMD-3X-02 12.5mm×13.2mm×1.8mm RF coaxial connector FGM842DAATB-3X-02
FGM842D FGM842DAAMD-0L-02 12.5mm×13.2mm×1.8mm Pin antenna interface FGM842DAATB-0L-02
FGM842D-P FGM842DPAAMD-0P-02 16.6mm×13.2mm×1.8mm PCB antenna FGM842DPAATB-0P-02

Quick Start Resources

Documentation & Guides

Resource Description Link
TE-B User Guide Hardware setup and pin configuration guide View Guide
QuecPlatform Usage Guide Development environment setup tutorial QuecPlatform
Download Guide Firmware flashing instructions Flash Tutorial
Hardware Design Guide PCB design and antenna placement guidelines Hardware Design

Code & Development

Resource Description Link
Source Code Complete SDK with examples and drivers GitHub Repository
QuecOpen Development Quick Start Custom application development tutorial QuecOpen(SDK) Guide
RTOS Development Guide Real-time operating system integration and programming guide RTOS_QuecOpen(SDK)
Wi-Fi Development Guide Wi-Fi API Guides and demos Wi-Fi_QuecOpen(SDK)
BLE Development Guide BLE API Guides and demos BLE_QuecOpen(SDK)
General API Development Guide General API Guides and demos General_API_QuecOpen(SDK)
Peripheral Interface Development Guide Peripheral API Guides and demos Peripheral_API_QuecOpen(SDK)

Video Resources

Resource Description Link
Unboxing Video Module unboxing and development environment setup Unboxing Video
Power Consumption Analysis Low-power consumption test Power Consumption Demonstration

Technical Resources

Software Resources

Category Package Description Link
Tools Flash Tools Firmware programming utilities BKFIL
Firmware Latest Firmware Production firmware releases AT Firmware

Technical Support

Need Additional Development Support?

Contact Quectel Technical Team

Our technical team provides comprehensive support for custom development needs, integration assistance, and troubleshooting guidance.