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EVK-LEXI-R422
LEXI-R422 cellular evaluation kit
User guide
Abstract
This guide explains how to set up the EVK-LEXI-R422 evaluation kit to begin evaluating the u-blox
ultra-small LEXI-R422 modules supporting multi-band LTE-M / NB-IoT / EGPRS cellular radio access
technology for low power wide area solutions.
UBXDOC-686885345-1758 - R02
C1-Public
www.u-blox.com
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Summary of Contents for Ublox EVK-LEXI-R422
- Page 1 LEXI-R422 cellular evaluation kit User guide Abstract This guide explains how to set up the EVK-LEXI-R422 evaluation kit to begin evaluating the u-blox ultra-small LEXI-R422 modules supporting multi-band LTE-M / NB-IoT / EGPRS cellular radio access technology for low power wide area solutions.
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Page 2: Document Information
EVK-LEXI-R422 - User guide Document information Title EVK-LEXI-R422 Subtitle LEXI-R422 cellular evaluation kit Document type User guide Document number UBXDOC-686885345-1758 Revision and date 06-Oct-2023 Disclosure restriction C1-Public This document applies to the following products: Product name Type number EVK-LEXI-R422 EVK-LEXI-R422-01-00 u-blox or third parties may hold intellectual property rights in the products, names, logos and designs included in this document. -
Page 3: Table Of Contents
4.1 Install a new modem from the control panel ..................11 4.2 Configuring a new connection ........................13 EVK-LEXI-R422 hardware ........................ 14 5.1 EVK-LEXI-R422 block diagram and basic description ..............14 5.2 Switches, jumpers and buttons ......................16 5.3 LEDs ................................17 5.4 Connectors ..............................18 5.5 EVK-LEXI-R422 pin out ..........................19... -
Page 4: Introduction
EVK-LEXI-R422 - User guide Introduction The EVK-LEXI-R422 kit is a powerful and easy-to-use tool that simplifies the evaluation of the u-blox LEXI-R422 multi-band LTE-M / NB-IoT /EGPRS cellular modules. ☞ See the LEXI-R422 data sheet and the LEXI-R422 system integration manual for features supported by LEXI-R422 modules. -
Page 5: Board Quick Start
Figure 2: SIM and antenna set up 1. Insert a SIM card into J300, the SIM card holder; 2. Connect the cellular antenna provided with the EVK-LEXI-R422 evaluation kit box to J106, the cellular antenna SMA connector; 3. If GNSS functionality is required, connect the GNSS antenna provided with the EVK-LEXI-R422 evaluation kit box to J103, the GNSS antenna SMA connector on ADP-GNSS, and keep the cellular GNSS detach switch SW304 in “GNSS”... -
Page 6: Power Supply
EVK-LEXI-R422 - User guide 2.1.2 Power supply J403 J402 DL401 DL401 J400 SW400 J300 J404 DL400 DL400 DL405 J1 03 (J1 00 on bottom side) J500 VCC_MOD J109 DS1 60 DS1 39 DS501 J1 06 DS500 J501 DL501 DL403 J1 05... -
Page 7: Local Connectivity
EVK-LEXI-R422 - User guide 2.1.3 Local connectivity J403 J402 DL401 SW400 J400 J300 SW401 SW403 J404 DL400 DL405 J103 DL405 DL404 J500 VCC_MOD J109 DS160 DS139 DS501 J106 DS500 DL501 J501 DL501 DL403 DL403 J105 DS100 J103 J201 DS201 J248... -
Page 8: Switch On The Cellular System
J1 04 (J1 01 on bottom side) J406 J405 Figure 5: Cellular power-ctrl push button To switch on the cellular system in the EVK-LEXI-R422, press SW302, the cellular power-ctrl button. UBXDOC-686885345-1758 - R02 Board quick start Page 8 of 25 C1-Public... -
Page 9: Switch Off The Cellular System
EVK-LEXI-R422 - User guide 2.3 Switch off the cellular system To switch off the cellular system in the EVK-LEXI-R422, send the +CPWROFF AT command. ☞ Issue AT+CPWROFF command before switching off the main power supply, otherwise settings and configuration parameters may not be saved in the non-volatile memory of the cellular module. -
Page 10: Register To Network
EVK-LEXI-R422 - User guide Register to network 3.1 Enabling error result codes Command sent by DTE (user) DCE response (module) Description AT+CMEE=2 Enable the cellular module to report verbose error result codes. 3.2 PIN code insertion (when required) Command sent by DTE (user) -
Page 11: Setting Up Cellular Packet Data Connection On Windows
This section describes how to set up a cellular packet data connection on Windows 10 using the operating system’s TCP/IP stack and EVK-LEXI-R422. This is also referred to as a dial-up connection. 4.1 Install a new modem from the control panel 1. - Page 12 EVK-LEXI-R422 - User guide 3. Select Standard 33600 bps Modem. Click Next. 4. Select COM port for data communication and click Next. The modem will be installed on this COM port. 5. Click Finish to complete the installation. 6. Now the new modem is visible in Control Panel, under Phone and Modem >...
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Page 13: Configuring A New Connection
A name for the connection, e.g., “EVK-LEXI-R422 dial-up” The packet data connection is now ready to be used with EVK-LEXI-R422. Click Connect to start the connection, then start a browser to check internet connectivity. Consult the cellular network operator for username and password. In most cases, they can be left empty. -
Page 14: Evk-Lexi-R422 Hardware
EVK-LEXI-R422 - User guide EVK-LEXI-R422 hardware 5.1 EVK-LEXI-R422 block diagram and basic description Figure 6 shows the main interfaces and internal connections of the EVK-LEXI-R422 evaluation kit: Cellular USB Cellular (two UARTs) antenna (J201 ) (J1 06) Cellular RS232 RS232... - Page 15 EVK-LEXI-R422 - User guide J248 J248 Pin 3 Pin 1 Figure 7: 3-pin header J248 available to set the routing of the UART interfaces The USB interface of the cellular module (available for diagnostic purpose only) is available on the native USB connector (J105) mounted on the cellular adapter board.
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Page 16: Switches, Jumpers And Buttons
3-pin header jumper to route and make accessible GNSS UART Tx over J104 ADP-GNSS the USB connector on the ADP-GNSS or to use it as Tx data ready for the cellular module Table 2: EVK-LEXI-R422 switches, jumpers and buttons description UBXDOC-686885345-1758 - R02 EVK-LEXI-R422 hardware Page 16 of 25 C1-Public... -
Page 17: Leds
ADP-GNSS GNSS time pulse MAX-M10S GNSS time pulse DS121 ADP-GNSS Cellular / GNSS I2C Cellular / GNSS module communication over the I2C interface DS107 ADP-GNSS Table 3: EVK-LEXI-R422 LEDs description UBXDOC-686885345-1758 - R02 EVK-LEXI-R422 hardware Page 17 of 25 C1-Public... -
Page 18: Connectors
J102 ADP-GNSS USB interface Table 4: EVK-LEXI-R422 connectors description ⚠ Caution! In the unlikely event of a failure in the internal protection circuitry, there is a risk of an explosion when charging a fully or a partially discharged battery. Replace the battery when it no longer has sufficient charge for unit operation. -
Page 19: Evk-Lexi-R422 Pin Out
EVK-LEXI-R422 - User guide 5.5 EVK-LEXI-R422 pin out Table 5 lists the interfaces of the LEXI-R422 modules, as routed up to the 42-pin dual-in-line board-to-board connectors (J103 and J104) available on the ADP-LEXI-R422 adapter board of the evaluation kit. LEXI-R422 module... - Page 20 EVK-LEXI-R422 - User guide Dual-in-line board-to-board connector J104 Dual-in-line board-to-board connector J103 Signal name Pin no. Pin no. Signal name Signal name Pin no. Pin no. Signal name Not connected Not connected Not connected USB_3V3 Not connected RSVD #46 Not connected...
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Page 21: Current Consumption Measurement
EVK-LEXI-R422 - User guide 5.6 Current consumption measurement To measure the current consumption of LEXI-R422 modules, remove the jumper socket from the cellular VCC supply jumper J109 on the ADP-LEXI-R422 board, as shown in Figure J403 J402 DL401 SW400 J400... -
Page 22: Appendix
EVK-LEXI-R422 - User guide Appendix A Setting up AT terminal communication The u-blox m-center cellular module evaluation tool is a powerful platform for evaluating, configuring and testing u-blox cellular products. m-center includes an AT commands terminal for communication with the device and can be downloaded for free from www.u-blox.com. For m-center example scripts, visit https://github.com/u-blox/m-center. - Page 23 EVK-LEXI-R422 - User guide 8. Click on the AT Terminal button, found at the upper right of the Home page. A new window opens, and the AT command terminal is now ready for communication with the EVK-LEXI-R422. Figure 12: AT terminal window 9.
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Page 24: B Glossary
EVK-LEXI-R422 - User guide B Glossary Abbreviation Definition Alternating current Adapter Board Access Point Name AT Command Interpreter Software Subsystem, or attention Board-To-Board Clear To Send Direct current Data Carrier Detect Data Communication Equipment Dual In Line Data Set Ready... -
Page 25: C Declaration Of Conformities
(petrol stations, refineries…). Any changes or modification made to this equipment will void its compliance to the safety requirements. Maintenance, inspections and/or repairs of the EVK-LEXI-R422 shall be performed by u-blox AG. Related documentation...
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