Rajant BreadCrumb ME3 User Manual (English)

Questions and Answers:

M
michael68Aug 1, 2025
How to fix Rajant BreadCrumb ME3 when a wireless client cannot join the network?
- S
  schroedertinaAug 2, 2025
  If a wireless client is unable to join the network, consider the following: * Verify that all BreadCrumb devices are powered on. * Confirm the wireless card in the client device is enabled, typically indicated by a blinking light. * Ensure the wireless card is in 'Infrastructure' or 'Access Point' mode, not 'Ad Hoc' mode. * Scan for the default ESSID 'breadcrumb54' or 'breadcrumb54-v10' (or your network's ESSID) using your wireless card's software. * Check that the wireless client’s IP address settings are correctly configured. * Make sure the security settings on the client device and BreadCrumb devices match. * Verify the client device isn't blocked by an ACL. * If AirFortress encryption is enabled on the BreadCrumb devices, ensure it's also enabled on the client.
E
Edwin LewisAug 6, 2025
What to do if Rajant BreadCrumb ME3 wireless client has sporadic connectivity due to obstructed LOS?
- M
  mercadorobertAug 6, 2025
  If a wireless client experiences sporadic network connectivity due to obstructed Line of Sight (LOS) to the BreadCrumb device, train users to maintain LOS to known BreadCrumb device locations. Strategically place BreadCrumb devices to ensure coverage of areas where users are expected to move.
B
Benjamin HuntAug 10, 2025
What happens when Rajant Network Hardware wireless client moves beyond BCWN range?
- M
  Mrs. Betty CharlesAug 10, 2025
  When a wireless client moves beyond the range of the BCWN, it will experience sporadic and eventually complete loss of network connectivity. To resolve this, deploy more BreadCrumb devices to increase the network's range as needed.
P
Patrick LeeAug 14, 2025
Why does Rajant BreadCrumb ME3 Network Hardware have sporadic connectivity in fog or light rain?
- C
  Carmen MarshallAug 15, 2025
  Light precipitation or fog after the initial deployment of the BCWN can cause sudden sporadic network connectivity for BreadCrumb devices and their wireless clients. To solve this, increase the network density by adding more BreadCrumb devices or moving existing ones closer together.
M
Makayla HughesAug 19, 2025
What to check if Rajant Network Hardware has connectivity issues with external antennas?
- C
  cclarkAug 19, 2025
  If you're experiencing difficulty establishing or maintaining network connectivity when using external antennas, check the antenna cables and their connections to the BreadCrumb device.
M
masseymelissaAug 23, 2025
How to resolve sporadic Rajant Network Hardware connectivity due to low battery?
- A
  alexanderleeAug 23, 2025
  When a BreadCrumb device's battery is low, network connectivity becomes sporadic for the device and its clients. Monitor battery usage and charge or replace batteries as necessary.
B
Brandi RiceAug 27, 2025
What to do if Rajant BreadCrumb ME3 Network Hardware BreadCrumb won't connect due to discharged battery?
- P
  Phyllis WarnerAug 27, 2025
  If a BreadCrumb device appears to power up but cannot connect to the BCWN, discharged batteries may be the cause. To prevent this, ensure that the batteries are charged when deploying the BCWN.

Rajant BreadCrumb ME3 Specifications

General

Brand	Rajant
Model	BreadCrumb ME3
Category	Network Hardware
Language	English

Summary

Introduction

What is a BreadCrumb?

Defines BreadCrumb as an IEEE 802.11/Ethernet device and lists its application scenarios.

Mobility through Meshing

Explains meshing as the core technique for dynamic network adaptation, resilience, and data routing.

Mesh – A Definition

Defines a mesh network as a collection of interconnected devices where data can pass through intermediate nodes.

BreadCrumbs Mesh by Channel and ESSID

Details how mesh links are formed between BreadCrumbs using shared radio channels and ESSIDs (network names).

Description of BreadCrumb ME3

Radio

Details the ME3's 802.11g radio, operating frequencies (2.4 GHz/900 MHz), and available channels.

Enclosure

Describes the ME3's rugged enclosure, dimensions, and external features for harsh environments.

18-Pin Amphenol Connector

Explains the 18-pin connector for accessing essential signals like power, Ethernet, and USB.

Antenna Connector

Identifies the Type N antenna connector and provides a warning for safe connection/disconnection.

Status LED

Explains the color codes and meanings of the Status LED for device status indication.

Zeroize Keys and Restore Factory Defaults / LED Configuration Switch

Describes the switch functionality for factory reset and controlling the Status LED display modes.

Internal Battery

Details the internal Li-ion battery, its capacity, voltage, and charging requirements.

Using BC|Commander

Deploying the BreadCrumb Wireless Network

Addressing

Covers the BCWN IPv4 addressing scheme, device IP assignments, and embedded DHCP server functions.

Channel Assignments

Explains default and manual channel settings for ME3-09 and ME3-24 models and their importance.

Physical Placement and other Considerations

Discusses critical factors like line-of-sight, distance, weather, and interference affecting network performance.

Deployment Guidelines and Methodology

Provides practical guidelines and a systematic methodology for successful on-site deployment of BCWN components.

BreadCrumb ME3 USB Firmware Upgrade

Troubleshooting

Sporadic Network Connectivity

Identifies common causes of intermittent network connectivity and provides corresponding solutions.

BreadCrumb Device Cannot Connect to BCWN

Lists issues that prevent BreadCrumb connection to the BCWN and offers troubleshooting steps.

Appendix A: Error and Warning Codes

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