Willfar Information Technology Co. Ltd.
Stock Code: 688100.SH The Pioneer in Smart Utility Service and IoT Solutions
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4G Communication Module for Smart Meter Celluar Data Collection System
Company Profile
Willfar Information Technology Co., Ltd.
- Established in 2004;
- Listed on the STAR Market of the Shanghai Stock Exchange in December 2019;
- Leading supplier of meter reading (AMI) equipment and operation service;
- The first company to develop "One DCU Reading Multi-meter" solution in China;
- The first company to have large-scale application of technologies and systems like "CPU smart-card Charge and Control", "One DCU Reading Multi-meter", LoRa-based RF Communication and "District Metering Area (DMA)”
Introduction
- The 4G Cellular module is GSM-based wireless packet switched technology used to provide end-to-end wide area wireless IP connections, which can transfers data to users in “Packet” mode at a high-speed. The Cellular module has prominent advantages in many aspects such as the transfer rate, wireless resource management and billing.
Technical Parameters
4G Module
| Item | Parameter |
| Nominal Voltage | 5V DC |
| Voltage Range | 5V DC~12V DC |
| Idle Current | 13mA@5V |
| Communication Current | 210mA@5V |
| Maximum Current | 800mA |
| Sensitivity | <-108.5dBm |
| SIM Interface | 1.8V/3V |
| Electrostatic Discharge IEC61000-4-2 | Air discharge, 15kV, 10 cycles |
| Operating Temperature | -25 °C ~ + 75 °C |
| Relative humidity | ≤95%, non-condensing |
UART Interface
Various interfaces in 4G Module to connect Meter
| Pin No. | Signal Name | Pin Type | Description |
| 1 | DC 5V | Power Supply | The 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 |
| 2 | DC 5V | ||
| 3 | DC 5V | ||
| 4 | METER RXD | Signal (meter input) 3.3V TTL/CMOS | Serial Data from MCU to Meter |
| 5 | DC 16V | Power Supply | Capable to supply 16V DC±1V, regulated (1) @500mA output for long term; (2) @800mA output for peak value |
| 6 | METER RXD | Signal (meter input) 3.3V TTL/CMOS | Serial Data from Meter to MCU |
| 7 | GND | GND Power | DC Ground |
| 8 | Reset module/Last gasp signal | Signal (meter input) 3.3V TTL/CMOS | Reset the communication module or Last gasp notification to module |
| 9 | GND | GND Power | DC Ground |
| 10 | GND | GND Power | DC Ground |
Certificate
CE
Features
1. GSM/GPRS (850/900/1800/1900 MHz)/ UMTS (B1/B8 )/ FDD
LTE (B1/B3/ B8)
TDD LTE (B38/B39/B40/B41)
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
•FDD LTE
- Max.100Mbps (DL), Max.50Mbps (UL)
•TDD LTE
- Max.61Mbps (DL), Max.18Mbps (UL)
•HSPA+
- Max. 14.4Mbps (DL), Max.5.76Mbps (UL)
•WCDMA
- Max.384Kbps(DL), Max.384Kbps(UL)
•EDGE Class:
- Max. 236.8Kbps(DL),Max. 236.8Kbps(UL)
•GPRS
- Max. 85.6Kbps(DL), Max. 85.6Kbps(UL)
Reading Instruction
1. Power LED with green always on
2. Network LED with red always blink
3. RXD LED with red will be blink when it send data
4. TXD LED with green will be blink when it receive data
5. SIM card pedestal for installing SIM card
6. Main chip(on the bottom side) is a dual frequency for GSM/GPRS/UMTS/LTE chip
7. Antenna pedestal with SMA type
8. Super capacitor for pushing last gasp
Function
A 4G Module is composed of several elements, including:
1. CPU is a dual frequency for GSM/GPRS and UMTS chip
2. Watch Dog chip to control power supply
3. Antenna pedestal with SMA type
4. SIM card pedestal for installing SIM card
5. LED display to indicate network status
6. DC/DC power supply to adjust voltage for GPRS CPU
Situation
For smart meter required communication function. Pluggable.
Dimension