4G networking guide
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  • Initial page
  • Introduction
  • 3G (SIM5215) vs 4G (LE910)
  • Hardware
  • Software
  • Code examples and extended information
  • API changelog
  • Documentation changelog
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  • Specifications
  • Versions
  • How to connect the module
  • Antennas
  • Power consumption
  • Time consumption

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Hardware

Previous3G (SIM5215) vs 4G (LE910)NextSoftware

Last updated 4 years ago

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Specifications

The 4G module is based on the LE910 chipset, manufactured by Telit. The module is managed by UART and it must be connected to socket 1 (direct connection, without Expansion Board). The main features of the module are listed below:

  • Output power:

    • Class 4 (2 W, 33 dBm) @ GSM 850 / 900

    • Class 1 (1 W, 30 dBm) @ GSM 1800 / 1900

    • Class E2 (0.5 W, 27 dBm) @ EDGE 850 / 900

    • Class E2 (0.4 W, 26 dBm) @ EDGE 1800 /1900

    • Class 3 (0.25 W, 24 dBm) @ UMTS

    • Class 3 (0.2 W, 23 dBm) @ LTE

  • Data transmission:

    • LTE:

      • Uplink up to 50 Mbps

      • Downlink up to 100 Mbps

    • HSPA+:

      • Uplink up to 5.76 Mbps

      • Downlink up to 42.0 Mbps

    • UMTS:

      • Uplink/Downlink up to 384 kbps

  • Protocols:

    • TCP/UDP

    • HTTP

    • FTP

Versions

Telit has different versions of the LE910 chipset. Each one of them was especially designed to comply with the RF and cellular regulations in different countries or regions of the world. Libelium originally integrated the following versions:

Features

LE910 EUG (v1)

LE910 NAG (v1)

LE910 AU V2

Region

Europe and Brazil

USA and Canada (Americas)

Australia

Supported 4G bands

B20 (800) B3 (1800) B7 (2600)

B17 (700) B5 (850) B4 (1700) B2 (1900)

B3 (1800) B7 (2600) B28 (700)

3G fall-back

Yes

Yes

No

Supported 3G bands

B5 (850) B8 (900) B1 (2100)

B5 (850) B2 (1900)

None

2G fall-back

Yes

Yes

No

Supported 2G bands

GSM 900, DCS 1800

GSM 850, PCS 1900

None

GPS/GLONASS

Yes

Yes

No

Certifications

CE (R&TTE), GCF

FCC, IC, PTCRB, AT&T

RCM, Telstra

Availability

Discontinued on November 2019

Discontinued on April 2019

Yes

Important note: The current stock of the LE910 4G radio that the manufacturer 'Telit' is distributing comprises the v2 version which does not have GPS. The models are:

  • LE910-EU V2 for Europe or Brazil

  • LE910-NA V2 for US or Canada

  • From April 2019, Libelium only offers the LE910 NA V2 for USA and Canada, since Telit discontinued the original LE910 NAG.

  • From November 2019, Libelium only offers the LE910 EU V2 for Europe and Brazil, since Telit discontinued the original LE910 EUG.

These v2 radios are similar to the v1 ones, but support more bands and do not have a GPS receiver.

Features

LE910 EU V2

LE910 NA V2

Region

Europe

USA and Canada (Americas)

Supported 4G bands

B20 (800) B8 (900) B3 (1800) B1 (2100) B7 (2600)

B12 (700) B13 (700) B5 (850) B4 (1700) B2 (1900)

3G fall-back

Yes

Yes

Supported 3G bands

B8 (900) B1 (2100)

B5 (850) B2 (1900)

2G fall-back

Yes

No

Supported 2G bands

900 /1800

None

GPS/GLONASS

No

No

How to connect the module

This module must be connected to the SOCKET1 on the Waspmote board. Like any other cellular radio, the connection is native so the radio does not need the Expansion Radio Board.

The SIM card used in the 4G module OEM version is a “standard SIM”, also known as “mini SIM”. The next picture shows how the SIM card must be plugged in the 4G module.

On the other hand, Plug and Sense! models with 4G radio provide a special connector in order to plug both micro USB wire and nano SIM card for the 4G module.

Antennas

The 4G module comes with 2 cellular antennas for improving the signal reception: normal (main) antenna and diversity antenna.

All these antennas are the same model and can be used in any of the 4G sockets. The operating bands of the dipole antenna go from 698 to 960 MHz and from 1710 to 2690 MHz. The maximum gain of the antenna is observed at 2.6 GHz: 3.4 dBi.

To get the maximum performance, it is recommended to place the antennas like that:

  • The main cellular antenna should be in vertical position, pointing to the sky, in order to radiate better to the cellular base stations around.

  • The diversity cellular antenna should be in horizontal position (orthogonal, 90º, to the main antenna). Besides, the plane where the antenna is should be also orthogonal to the main antenna's plain. Finally, it is advised to place this 2nd cellular antenna as far as possible from the main antenna. These 3 measures will maximize the gain due to reception diversity.

Power consumption

The 4G module is directly powered by the battery. The next table shows the Waspmote's peak current consumption in different states of the 4G module.

State

Mean power consumption

On

100 mA

Transmitting data

400 mA

Receiving data

400 mA

Non-rechargeable batteries are not advised for the 4G module, because the high peaks of current consumption could make the voltage of these batteries to go below 3.3 V so Waspmote would reset. The rechargeable battery will not suffer this effect as long as its level is above 20%.

Time consumption

The following table describes the mean elapsed time for some actions in a single test for several attempts:

Action

Mean elapsed time

Power on

~11 s

Start data connection

~4 s

Perform HTTP GET or POST

~0.7 s

Open FTP session

~3 s

Perform FTP upload 10 kB file

~7 s

Perform FTP download 10 kB file

~6 s

Some of these actions approximately have a fixed elapsed time like powering on the module. However, the actions related to data transmission (HTTP, FTP, etc.) are dependent on external circumstances (MNO, coverage quality, etc) and show more variability from the mean value.

Figure : 4G module
Figure : Module connected to Waspmote in SOCKET1
Figure : SIM card installation in OEM version
Figure : SIM card installation in Plug and Sense! version
Figure : Push-push mechanism in the External SIM/USB socket
Figure : 4G module antennas