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Internal 3G Communication Module For Smart Meter Celluar Data Collection System WS-18i

Place of Origin:Changsha, Hunan
Brand Name:Willfar Information Techonology Co., Ltd.
Model Number:WS-18i
Minimum Order Quantity :100
Packaging Details :Carton Packaging
Delivery Time :30 days
Payment Terms :T/T
Supply Ability :2000 per day (based on the number of the order)
Detail Information
Nominal Voltage:5V DCBrand:Willfar Information
Maximum Current:800mAVoltage Range:5V DC~12V DC
Operating Temperature:-25 °C ~ + 75 °CRelative Humidity:≤95%, Non-condensing
High Light:

4g module ,

wireless networking module

Product Description

- The Internal 3rd Generation module is GSM-based wireless packet switched technology used to provide end-to-end wide area wireless IP connections, which can transfer data to users in “Packet” mode at a high speed.

- The Internal 3G module has prominent advantages in many aspects such as the transfer rate, wireless resource management and billing.

- More than 1000,000 3G Data Collector had been installed on the field all over the world. The stability of this product had been fully verified.


Technical Parameters

Internal 3G Module

Nominal Voltage5V DC
Voltage Range5V DC~12V DC
Idle Current13mA@5V
Communication Current210mA@5V
Maximum Current800mA
SIM Interface1.8V/3V
Electrostatic Discharge IEC61000-4-2Air discharge, 15kV, 10 cycles
Operating Temperature-25 °C ~ + 75 °C
Relative Humidity≤95%, non-condensing

UART Interface

Various interfaces in Internal 3G Module to connect Meter and Antenna.

Pin No.Signal NamePin TypeDescription
1DC 5VPower Supply

These 3 PINs are parallel connections that are capable to supply 5V±0.2V,

Regulated (1) @1200mA output for long term; (2) @2A output for peak value.

2DC 5V
3DC 5V
4METER RXDSignal (meter input) 3.3V TTL/CMOSSerial Data from MCU to Meter
5DC 16VPower Supply

Capable to supply 16V±1V,

Regulated (1) @500mA output for long term; (2) @800mA output for peak value.

6METER RXDSignal (meter input) 3.3V TTL/CMOSSerial Data from Meter to MCU
7GNDGND PowerDC Ground
8Reset module/Last gasp signalSignal (meter input) 3.3V TTL/CMOSReset the communication module Or Last gasp notification to module
9GNDGND PowerDC Ground
10GNDGND PowerDC Ground

1. GSM/GPRS (850/900/1800/1900 MHz)/WCDMA (2100MHz)

2. Over the Air Update

3. Supports TCP/UDP/FTP/DNS protocol

4. Remote SMS configuration

5. Control Via AT Commands

6. Supports USB2.0 slave mode

7. Update via USB Port

8. Data transfer


- Max. 14.4Mbps(DL), Max.5.76Mbps(UL)


- Max.384Kbps(DL), Max.384Kbps(UL)

EDGE Class:

- Max. 236.8Kbps(DL),Max. 236.8Kbps(UL)


- Max. 85.6Kbps(DL), Max. 85.6Kbps(UL)

Reading Instruction


1. Date cable socket to connect meter

2. SIM card pedestal for installing SIM card

3. USB interface for debug and update firmware

4. Antenna pedestal with SMA type

5. Main chip is a dual frequency for GSM/GPRS and UMTS chip