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NimbeLink Skywire User Manual

Raspberry pi
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Skywire​
Raspberry Pi Adapter
®​
User Manual
NimbeLink Corp
Updated: October 2017
PN 1001407 rev 1
​ © NimbeLink Corp. 2017. All rights reserved.
1

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Summary of Contents for NimbeLink Skywire

  • Page 1 Skywire​ Raspberry Pi Adapter ®​ User Manual NimbeLink Corp Updated: October 2017 PN 1001407 rev 1 ​ © NimbeLink Corp. 2017. All rights reserved.

  • Page 2: Table Of Contents

    RPI Standoffs Adapter Placement Connect USB Attach Antennas Attach the Ethernet cable Apply Power Connect Device Tree Overlay Skywire Serial Interfacing Skywire USB Interfacing Grove Connectors Additional Resources PN 1001407 rev 1 ​ © NimbeLink Corp. 2017. All rights reserved.

  • Page 3: Introduction

    1.2 Product Description The Skywire Raspberry Pi Adapter allows Raspberry Pis to gain easy access to the Internet of Things (IoT) via any of the Skywire plug-in cellular modems. The Raspberry Pi is a low-cost, community-supported development platform that allows quick, easy application development. It accepts plug-in boards called “hats”...

  • Page 4: Orderable Parts

    GPIO interface are likely to be compatible, but have not been evaluated. ● Raspberry Pi 3 ● Raspberry Pi Compute Module 3 I/O Board 1.5 Additional Resources ● NimbeLink's Skywire Raspberry Pi Development Kit Product Page PN 1001407 rev 1 ​ © NimbeLink Corp. 2017. All rights reserved.

  • Page 5: Technical Specifications

    2. Technical Specifications 2.1. Block Diagram PN 1001407 rev 1 ​ © NimbeLink Corp. 2017. All rights reserved.

  • Page 6: Pinout

    *Note 2: Not connected by default, optional 0 ohm jumper can be connected to use the signal. *Note 3: J8 is the adapters 40 pin connector for the RPI 3 and J11 is the 60 pin connector for the CM3 I/O board. PN 1001407 rev 1 ​ © NimbeLink Corp. 2017. All rights reserved.

  • Page 7: Getting Started

    The Skywire Raspberry Pi Adapter will automatically configure the Raspberry Pi's serial port to be used for connecting to the Skywire modem. The Raspberry Pi's serial console must be disabled. To access the Raspberry Pi's console it is recommended that users configure their RPI to allow for SSH over a direct Ethernet connection between a PC and the Raspberry Pi, as detailed in section 3.1.

  • Page 8: Ssh

    4. Double click on ​ I nternet Protocol Version 4 (TCP/IPV4). 5. Select the "Use the following IP address" option and enter the following: IP Address: 192.168.0.11 Subnet Mask: 255.255.255.0 Default Gateway: 192.168.0.1 6. Select OK. PN 1001407 rev 1 ​ © NimbeLink Corp. 2017. All rights reserved.

  • Page 9: Test The Ssh Connection

    3.2.3. Navigate to and select Serial. 3.2.4. Select No to disable the serial console. 3.2.5. Select yes to enable hardware serial port. 3.2.6. Select Ok. 3.2.7. Choose Finish. 3.2.8. Reboot to save changes. PN 1001407 rev 1 ​ © NimbeLink Corp. 2017. All rights reserved.

  • Page 10: Activate Modem (One-Time Step)

    3.4. Attaching the adapter The following steps will detail how to connect the Skywire to the Raspberry Pi. Skywire Placement 3.4.1. Mount the Skywire on the adapter with the Skywire's U.FL connectors towards the middle of the board.

  • Page 11: Connect The U.fl Antenna Cables

    Connect the U.FL Antenna Cables 3.4.2. Attach the U.FL antenna cables to the Skywire. RPI Standoffs 3.4.3. Place standoffs for the adapter on the Raspberry Pi 3B (optional, but recommended). PN 1001407 rev 1 ​ © NimbeLink Corp. 2017. All rights reserved.

  • Page 12: Adapter Placement

    If standoffs are being used, ensure that they are properly aligned. Connect USB 3.4.5. Connect the Skywire's USB interface to the Raspberry Pi's. PN 1001407 rev 1 ​ © NimbeLink Corp. 2017. All rights reserved.

  • Page 13: Attach Antennas

    Attach Antennas 3.4.6. Connect the cellular antennas to the adapter. Attach the Ethernet cable 3.4.7. Attach an Ethernet connection to the RPI to allow for local SSH connection. PN 1001407 rev 1 ​ © NimbeLink Corp. 2017. All rights reserved.

  • Page 14: Apply Power

    J8 to supply the Raspberry Pi. 3.5. Connect Connect the RPI's Ethernet to your computer's Ethernet then SSH to the Raspberry Pi over the Ethernet connection PN 1001407 rev 1 ​ © NimbeLink Corp. 2017. All rights reserved.

  • Page 15: Device Tree Overlay

    If the adapter’s DTO did not successfully load you will see the following: root@raspberrypi:~# cat /proc/device-tree/hat/product cat: /proc/device-tree/hat/product: No such file or directory PN 1001407 rev 1 ​ © NimbeLink Corp. 2017. All rights reserved.

  • Page 16: Skywire Serial Interfacing

    Raspberry Pi's UART to connect to the modem, with flow control (RTS/CTS). The DTO will configure the Raspberry Pi to use the hardware serial connection (ttyAMA0) with the Skywire. On the Raspberry Pi 3 it will reroute the WIFI/Bluetooth module to ttyS0.

  • Page 17: Skywire Usb Interfacing

    3.8. Skywire USB Interfacing Connector J4 on the adapter allows users to connect their Raspberry Pi directly to the Skywire's USB interface using a mini-B USB Cable. Each Skywire has a unique USB interface and users should consult the datasheet for the specific Skywire modem they're using for more details on interfacing to the modem over USB.

  • Page 18: Additional Resources

    Sending GPS data using Python ● Defining PDP Contexts MSCs ● Streaming Video over LTE on BBC ● Starting PPP at Boot ● Starting PPP with SSH over Ethernet PN 1001407 rev 1 ​ © NimbeLink Corp. 2017. All rights reserved.

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