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Smart Radio Trouble-Shooting
Guide
Smart Radio Trouble-Shooting Guide
Advanced MIMO Mesh Router for Resilient Private Wireless Networks
Introduction
This is a trouble-shooting guide for all Smart Radio models. The Smart Radio runs Doodle Labs
Mesh Rider® OS, a customized version of Openwrt. This guide is organized in the following
sections
•
System Overview
•
Trouble-shooting radio access
•
Trouble-shooting link quality
•
UART and USB ports
•
Crashes, reboots and others
•
Factory Resetting
•
Connect with Technical Support
•
References
We recommend reading the System Overview section before jumping to any specific section of
the guide.
System Overview
Fig. 1 shows the default network configuration of the Smart Radio. The radios are pre-
configured so that the entire Mesh Rider network acts like one big distributed Ethernet switch.
Therefore, devices plugged into Mesh Rider will automatically be able to communicate with one
another if they are on the same subnet. Accessing the radios themselves requires them to be
on the same subnet as the host machine.
© 2021 Doodle Labs. All rights reserved.
Page 1
September 8, 2021
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Table of Contents
Summary of Contents for Doodle Labs Smart Radio
- Page 1 Advanced MIMO Mesh Router for Resilient Private Wireless Networks Introduction This is a trouble-shooting guide for all Smart Radio models. The Smart Radio runs Doodle Labs Mesh Rider® OS, a customized version of Openwrt. This guide is organized in the following sections •...
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Page 2: Available Interfaces
Mesh Rider Radio Ethernet (ETH0) Ethernet (ETH1) USB Device Port USB Host Port -U only WiFi Radio UART -S only up to 1 Mbps up to 115,200 bps © 2021 Doodle Labs. All rights reserved. September 8, 2021 Page 2... - Page 3 Guide Mesh Rider Interface The Mesh Rider interface is the main wireless interface and is available on all Smart Radio products. Because it uses a proprietary wireless protocol, it is only accessible from other Mesh Rider devices. The Mesh Rider wireless interface can be configured in Mesh or WDS AP/Client modes.
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Page 4: Configuration Recommendations
Accessing the CLI using SSH You can access the CLI of the Smart Radio using SSH. Windows 10 and many Linux distributions come with a built-in SSH client. SSH into the radio using user@host-pc:~$ ssh root@<IP ADDRESS>... - Page 5 “I can no longer access the Smart Radio” If you previously were able to access the Smart Radio and can no longer do so, first do a sanity check on the items in the section above. Assuming your IP configuration is fine and the devices are connected, you can proceed with the recommendations below.
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Page 6: Trouble-Shooting Link Quality
Reply from fe80::%16: time=413ms Reply from fe80::%16: time<1ms Reply from fe80::%16: time=2ms Reply from fe80::%16: time=1ms 5. Assuming the ping worked, we can check the ipv6 address of the Smart Radio with $ netsh interface ipv6 show neighbors Interface 16: Ethernet Internet Address... - Page 7 If the radios are more than 5-10 meters apart and the throughput is still poor, then it could be an interference or power supply issue. Please see the advice in the next section. © 2021 Doodle Labs. All rights reserved. September 8, 2021...
- Page 8 In the case above, we are getting around 24 Mbps in a 15-MHz bandwidth due to interference. The expected RSSI was -37 dBm, but the measured RSSI was significantly lower (-58) on the second antenna because of misalignment. © 2021 Doodle Labs. All rights reserved. September 8, 2021 Page 8...
- Page 9 Note that the thermal noise floor is approximately -116 dBm per FFT bin in a 20-MHz © 2021 Doodle Labs. All rights reserved. September 8, 2021...
- Page 10 The Smart Radios have power supply isolation built in, but their effectiveness depends on how noisy the supply really is. If you are unsure whether your supply is causing a problem, power the Smart radio from a separate battery. © 2021 Doodle Labs. All rights reserved.
- Page 11 1. Make sure to choose an antenna which is designed for the operating frequency of the Smart Radio. Wideband and dual-band antennas which are designed to work over many bands generally don’t perform as well as narrowband antennas a single particular band of interest.
- Page 12 If the connection state is not , then it means that the application ESTABLISHED trying to connect to the Smart Radio is unable to connect. This is normally a © 2021 Doodle Labs. All rights reserved. September 8, 2021...
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Page 13: Usb Troubleshooting
The Android device’s OTG port switches to host mode and it raises the VBUS line to 5-V. The Android device switches to DHCP client mode by default, but it can © 2021 Doodle Labs. All rights reserved. September 8, 2021... - Page 14 Ideally the lines should be kept short for best signal integrity. Some Smart Radio models supply a 5-V output with the USB. This output is rated to a maximum of 1-A. If the connected device is power hungry, then you should supply the power externally.
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Page 15: Factory Resetting
/var/log/messages The Smart Radio also includes a utility to do a comprehensive save of the system state root@smartradio:/# sysutils savelog The results will be stored in . You can copy this file to your host your /tmp/savelogs.tar.gz... - Page 16 References Doodle Labs Technical Library, Technical Library For Mobile Industrial Mesh Radios | Doodle Labs, September 2021 Coax Calculator, https://www.qsl.net/co8tw/Coax_Calculator.htm, September 2021 © 2021 Doodle Labs. All rights reserved. September 8, 2021 Page 16...
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