Indoor Hotspot Overview

Indoor Helium Hotspot Overview



Indoor Hotspot Included

The Nebra Indoor Helium Hotspot is a compact & elegant solution to provide Helium LongFi coverage and start mining HNT with ease.

Quick Specifications

SpecificationNebra Indoor Hotspot
RRP£350 ex VAT
CasePlastic (ABS)
Ingress ProtectionIP40
Dimensions150x150x50 mm (Excluding Antenna)
Weight0.4 Kg
Power Requirement9-16V DC @ 15W
Average Power Consumption~8W*
Annual Power Consumption~70kWh
Maximum TX Power24-27dBm**
Network Connectivity10/100 Ethernet, 2.4Ghz 802.11N Wi-Fi
Antenna ConnectionRP-SMA Female
Rated Ambient Temperature20-30C
Base SOMRaspberry Pi CM3+
CPU SpecificationBroadcom BCM2837B0, Quad-Core Cortex-A53 (ARMv8) 64-bit SoC @ 1.2GHz
High Endurance Storage32GB
RAM1GB LPDDR2 SDRAM
Internal PCB Dimensions~ 139x139x30 mm
* Average Power Consumption Measured At Mains,
** Maximum TX Power may be capped to a lower amount in some regions.

Package Contents

Indoor Hotspot Included

  • The Nebra Helium Indoor Hotspot
  • RP-SMA LoRa Antenna
  • Worldwide 12V 1.5A Power Adapter (with UK, US, EU, and Aus plug heads)
  • 1m Cat5e Ethernet cable
  • 2 x serial number QR code stickers
  • 2 x Nebra stickers

Please note the above image is for illustrative purposes only, the colours of some parts may change.

Block Diagram

Indoor Hotspot Block Diagram

Supported Regions

The Nebra Indoor Hotspot comes in three frequency versions:

FrequencySupported Regions
433 MhzComing Soon
470 MhzCN470
868 MhzEU868, IN865, RU864
915 MhzUS915, AU915, AS923-1/2/3/4, KR920

The frequency is set upon initialization by the Helium Network.

Antenna Specifications

Specification470Mhz Model868 & 915Mhz Models
Frequency Range420-480860-930 Mhz
Peak Gain3 dBi3 dBi
VSWR< 2.3< 1.8
Input Impedance50 Ohms50 Ohms
Length17.2CM20.7CM

Dimensions

The Nebra Indoor Hotspot is 150x150x50MM In size when nothing is connected.

Indoor Hotspot Connectors

Approximately 175x150x50MM space is required when accounting for the space required for connectors.

Interfaces

Connectors

Indoor Hotspot Connectors

  1. 9-16V @ 15W DC 6.5MMx2.0MM Barrel Jack
  2. LED Indicator.
  3. Interface Button
  4. RP-SMA LoRa Connector
  5. Ethernet Connector

Status Indicator

The Nebra Indoor Hotspot has a status indicator as shown above.

The Top LED will act accordingly:

  • Off - Software has not started yet.
  • On - Operating as normal
  • Slow Blinking - Bluetooth Pairing is enabled
  • Fast Blinking - There is potentially a fault. Please check the diagnostics page.

The Bottom LED acts accordingly:

  • Off - Unit is receiving no power.
  • On - Unit is powered up.

Button

The Nebra Indoor Hotspot has a button on the back of the unit.

Indoor Hotspot Connectors

This is used to re-enable Bluetooth pairing on the hotspot, hold the button in for approximately 15 seconds then release to start pairing. The top light should start blinking slowly if successful.

Firmware

The Nebra Hotspots run customized software to provide high reliability and ensure your units are as up to date as they can be.

Approximately your hotspot will update once a week in an automatic process, we will announce updates via various social media platforms when they happen.

The software is open-source and available on our Helium Miner Software repo on GitHub.

Unit Information

Each unit has a sticker located on the base of the unit.

Indoor Hotspot Base

This includes the following important information:

  • FREQ: Frequency of the Unit
  • ETH: Ethernet MAC address
  • NSER: Nebra Serial Number
  • RPI: Raspberry Pi Serial Number

You will require some of this information when linking your unit to our remote management dashboard.

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