Quectel EC21 Series User Manual

LTE Standard Module Series
EC21_Series_Hardware_Design
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4
Within operating temperature range, the module is 3GPP compliant.
5
Within extended temperature range, the module remains the ability to establish and maintain a voice, SMS, data
transmission, emergency call*, etc. There is no unrecoverable malfunction. There are also no effects on radio spectrum
and no harm to radio network. Only one or more parameters like P
out
might reduce in their value and exceed the specified
tolerances. When the temperature returns to normal operation temperature levels, the module will meet 3GPP
specifications again.
 Supports long frame synchronization and short frame synchronization
 Supports master and slave modes, but must be the master in long
frame synchronization
USB Interface

Compliant with USB 2.0 specification (slave only); the data transfer rate
can reach up to 480 Mbps

Used for AT command communication, data transmission, GNSS
NMEA output, software debugging, firmware upgrade and voice over
USB

Support USB serial drivers for: Windows 7/8/8.1/10, Linux 2.6–5.12,
Android 4.x–11.x, etc.
UART Interfaces
Main UART:
 Used for AT command communication and data transmission
 Baud rates reach up to 921600 bps, 115200 bps by default
 Support RTS and CTS hardware flow control
Debug UART:
 Used for Linux console and log output
 115200 bps baud rate by default
SD Card Interface
Supports SD 3.0 protocol
SGMII Interface

Supports 10M/100M/1000M Ethernet work mode

Supports Max. 10 Mbps (DL)/Max. 5 Mbps (UL) for 4G network
Interfaces WLAN and
Bluetooth Applications
 Support a low-power SDIO 3.0 interface for WLAN
 Support UART & PCM interfaces for Bluetooth
Rx-diversity Support LTE/WCDMA Rx-diversity
GNSS Features
 Protocol: NMEA 0183
 Data update rate: 1 Hz by default
AT Commands
 Compliant with 3GPP TS 27.007, 3GPP TS 27.005
 Quectel enhanced AT commands
Network Status
Indication
Two pins including NET_MODE and NET_STATUS to indicate network
connectivity status
Antenna Interfaces
 Main antenna interface (ANT_MAIN)
 Rx-diversity antenna interface (ANT_DIV)
 GNSS antenna interface (ANT_GNSS)
Physical Characteristics
 Size: (29.0 ±0.15) mm × (32.0 ±0.15) mm × (2.4 ±0.2) mm
 Weight: approx. 4.9 g
Temperature Range
Operating temperature range: -35 °C to +75 °C
4
Extended temperature range: -40 °C to +85 °C
5
Storage temperature range: -40 °C to +90 °C

Quectel EC21 Series Specifications

General

Brand	Quectel
Model	EC21 Series
Category	Control Unit
Language	English