NEBRA Outdoor Helium Hotspot User manual
OUTDOOR HELIUM HOTSPOT OVERVIEW
Outdoor Helium Hotspot Overview
The Nebra Outdoor Helium Hotspot is an ideal solution for providing great
Helium LongFi coverage and suitable for use outside in most envrionments.
• Specications
• Package Contents
• Block Diagram
• Supported Regions
• Antenna Specications
• Hardware Overview
–Mainboard Layout
–Status LEDS
–Daughterboard Overview
• Dimensions
• Interfaces
–Status Indicator
–Button
• Firmware
• Certications
–Certication List
–Certication Codes
–FCC Statement
• Resources
Specications
Specication Nebra Outdoor Hotspot
RRP £450 ex VAT
Ingress Protection IP67
Dimensions 300x200x100 mm (Excluding
Antenna)
Rated Ambient Temperature -25-80oC
Weight 1.25 Kg
Power Requirement 802.3AF 48V POE OR 9-16V DC @
15W
Average Power Consumption ~12-15W*
Annual Power Consumption ~105-130kWh
Maximum TX Power 24-27dBm**
Network Connectivity 10/100 Ethernet, 2.4Ghz 802.11N
Wi-Fi, Optional 4G Module available
separately.
Antenna Connection N Type Female
Base SOM Raspberry Pi CM3+
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Specication Nebra Outdoor Hotspot
CPU Specication Broadcom BCM2837B0, Quad Core
Cortex-A53 (ARMv8) 64-bit SoC @
1.2GHz
High Endurance Storage 32GB
RAM 1GB LPDDR2 SDRAM
Outer dimensions (w/o
connectors)
235mm x 155mm x 75mm
* Average Power Consumption Measured At Mains, higher average consump-
tion when the optional 4G Module is used.
** Maximum TX Power may be capped to a lower amount in some regions.
Package Contents
Figure 1: Indoor Hotspot Included
1. 3 dBi N-Type Glass Fiber Antenna
2. WiFi Antenna
3. Nebra Helium Outdoor Hotspot
4. M20 General Cable Gland
5. M10 General Cable Gland
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6. M22 General Cable Gland
7. Sealing String
8. Spare Blanking Plugs N-type
9. Spare Blanking Plugs N-type
10. Spare Blanking Plugs M20
11. L Shaped Mounting Brackets 2 x L
12. Z clamp Brackets x 2 (for pole mounting)
13. Serial Number QR Code Stickers x 2
14. Nebra Stickers x 2
Block Diagram
Figure 2: Outdoor Hotspot Block Diagram
Supported Regions
The Nebra Outdoor Hotspot comes in three hardware versions:
Frequency Supported Regions
433 Mhz Coming Soon
470 Mhz CN470
868 Mhz EU868, IN865, RU864
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Frequency Supported Regions
915 Mhz US915, AU915, AS923-1/2/3/4, KR920
The frequency is set upon initialisation by the Helium Network.
Antenna Specications
Specication 470Mhz Model 868 & 915Mhz Models
Frequency Range 420-480 860-930 Mhz
Peak Gain 3 dBi 3 dBi
VSWR ≤1.5 ≤1.5
Input Impediance 50 Ohms 50 Ohms
Length 50CM 30CM
Hardware Overview
Mainboard Layout
Layout Contents
1. DC Barrel Jack - 2MM Pin, 6.5MM Barrel centre positive. Recommended
PSU 12V @1.5A.
2. LAN Connector - RJ45 Connector wired to the Ethernet & POE Modules.
3. Power Jumper - 3 Pin jumper to select power source, place in position
1-2 for POE, or 2-3 for DC Jack.
4. POE Module - Negotiates 802.11AF compliant connection and outputs
12V DC into the power section.
5. Power Section - Takes the 12V power source and regulates it down to
5V & 3V3 rails.
6. Ethernet Controller - 10/100 Ethernet to USB 2.0 Adaptor, Maxlinear
XR22800IL32-F. Connected to USB Hub.
7. USB Hub - 4 Port USB Hub, wired to Ethernet controller, USB port & M-
PCIE connector.
8. USB Port - USB 2.0 Type A Connector, recommended max power 250mA.
9. “Raspberry Pi” Header - 40 Pin RPi style header, please note only the
rst 24 pins are wired. (Refer to 1.1.X)
10. M-PCIE connector - M-PCIE Connector wired up to USB for connectivity,
has Micro SIM Card connected to it.
11. Micro Sim Card Slot - For use with 3G/4G Module in M-PCIE slot
12. Lora Module Connector - Designed for use with select M-PCIE LoRa Con-
centrators, these only have wired up SPI, plus GPS PPS from the GPS
Module.
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Figure 3: SmartGatewayBreakdown
13. GPS Module - NEO-6M GPS module, connected to UART1 on the com-
pute module. Plus PPS signal to LoRa modules for accurate timings.
PLEASE NOTE: this is not used by the Nebra Helium Hotspots and
is only present on the rst batch.
14. Daughterboard Connector - Connects to Compute Module Daughter-
board.
Status LEDS The mainboard has 3 Status LEDs which do the following: *
12V LED - Indicates the mainboard has power located near the jumper. * 5V
LED - Indicates the 5V regulator is operational located in the power section.
* 3V3 LED - Indicates the 3V3 regulator is operational located in the power
section.
Daughterboard Overview The standard daughterboard supports both the
Compute Module 3 and Compute Module 3+ (including Lite) variants.
While also compatible with the CM1 we recommend using the CM3 / CM3+ /
CM3 Lite / CM3+ Lite for the extra power and RAM as well as larger onboard
storage options.
Layout Contents
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Figure 4: DaughterboardBreakdown
1. Daughterboard Connector - Connects to the Mainboard.
2. SO-DIMM connector - Raspberry Pi Compute Module connects here.
3. Power Regulator - Power Circuitry required for the compute module.
4. SD Card Slot - SD Card Slot for if a CM3/CM3+ Lite is used.
5. Micro USB Connector - Used to re-ash the EMMC on the Compute Mod-
ule.
6. USB Switch - IC responsible to allow switching between Micro USB and
Mainboard.
7. USB Jumper - Used to switch between normal operation and ash mode,
ensure it is in position 1-2 for normal operation and 2-3 for program-
ming.
8. Power Jumper - Allows the module to be powered from the Micro USB
connector. Only connect when programming from PC and ensure main-
board is not connected.
Status LEDS The board has 2 Status LEDs which do the following:
• Power LED - Indicates the board has power. (Blue)
• ACT LED - Indicates Read / Write operations on the storage. (Green)
Dimensions
The Nebra Outdoor Hotspot is approximately 300x200x100 mm In size when
nothing is connected.
You can nd the datasheet here
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Figure 5: DaughterboardBreakdown
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Interfaces
Connectors
From the outside
1. CAT 5e Gland / Passthrough Gland
2. N-Type Female LoRa Antenna Connector
On the inside
1. 9-16V @ 15W DC 6.5MMx2.0MM Barrel Jack
2. Ethernet Connector
3. LED Indicator
4. Interface Button
5. 4G / LTE Module Connector
6. Sim Card Slot
Status Indicator The Nebra Outdoor Hotspot has a status indicator called
LED1 on the Wi daughterboard in the middle of the hotspot
This indicator is RED and will act accordingly:
• O - Software has not started yet.
• On - Operating as normal
• Slow Blinking - Bluetooth Pairing is enabled
• Fast Blinking - There is potentially a fault. Please check diagnostics page.
Button The Nebra Outdoor Hotspot has a button on the Wi daughter-
board in the middle of inside teh hotspot. This is labeled S1
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 adjacent
status light LED1 should start blinking slowly if successful.
Firmware
The Nebra Hotspots run a customised 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 hap-
pen.
The software is open source at https://github.com/nebraltd/helium-miner-
software
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Figure 6: DaughterboardBreakdown
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Figure 7: DaughterboardBreakdown
Certications
We are working on getting the Nebra Outdoor Hotspot certied in multiple
regions.
Certication List
Approval Countries Covered Hardware Frequency Status Frequency Plans
CE European Economic Area 868 Mhz Completed EU 868
UKCA United Kingdom 868 Mhz In Progress EU 868
FCC United States of America 915 Mhz Completed US 915
ISED Canada 915 Mhz In Progress US 915
RCM Australia & New Zealand 915 Mhz In Progress AU 915
MIC Japan 915 Mhz In Progress AS920 (AS1)
SRRC China 470 Mhz In Progress CN 470
EAC Russia 868 Mhz In Progress RU 864
WPC India 868 Mhz In Progress IN 865
All certication related documents can be viewed in the certication folder
for our outdoor Raspberry Pi miner.
Certication Codes
Certication ID Code
FCC 2AZDM-HNTOUT
ISED 27187-HNTOUT
FCC Statement This device complies with Part 15 of the FCC Rules. Opera-
tion is subject to the following two conditions:
1. This device may not cause harmful interference.
2. This device must accept any interference received, including interfer-
ence that may cause undesired operation.
Changes or modications not expressly approved by the party responsible for
compliance could void the user’s authority to operate the equipment.
NOTE: This equipment has been tested and found to comply with the limits
for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits
are designed to provide reasonable protection against harmful interference
in a residential installation. This equipment generates uses and can radiate
radio frequency energy and, if not installed and used in accordance with the
instructions, may cause harmful interference to radio communications. How-
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ever, there is no guarantee that interference will not occur in a particular in-
stallation.
If this equipment does cause harmful interference to radio or television re-
ception, which can be determined by turning the equipment o and on, the
user is encouraged to try to correct the interference by one or more of the
following measures: * Reorient or relocate the receiving antenna. * Increase
the separation between the equipment and receiver. * Connect the equip-
ment into an outlet on a circuit dierent from that to which the receiver is
connected. * Consult the dealer or an experienced radio/TV technician for
help.
Resources You can nd 2D and 3D drawings of the outdoor IP67 case here
• Outdoor IP67 Case Diagram
• Outdoor IP67 Case Drawing
• Outdoor IP67 3D Model Top
• Outdoor IP67 3D Model Bottom
Click here to download all the les.
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