I found out that our webhost generates an SSL cert from “Let’s Encrypt” and have enabled HTTPS to encrypt some of the website’s traffic. Figured this was best since a small bit of the data we handle could be viewed as sensitive information.
So, if you’ve been keeping track of things, you know that we recently did some upgrades to the power supply! We upgraded to a new 50 watt solar panel, a new PWM charge controller and a marine deep cycle battery.
We have been running a test stream for over 37 hours straight now, meaning there have been no resets under the new beefed up power system!
Additional overflow pictures, seems the storm cloud didn’t like being called small and has come back.
Good afternoon everyone,
We met with the Park Manager for Huntsville and presented our project with its goals and current structure. After discussing things such as how the project is powered, making sure the project doesn’t capture photos of passerby’s and so on; I think it is safe to say that we at least have a foot in the door.
After going over some documentation and explaining various aspects of the camera node and its requirements, the Park Manager (Colleen MacDonald) has brought up a point of possibly having us attend a town committee meeting to showcase the project to other folks involved in the town’s operations. In reaction to that, we have began redesigning our project to fit into a small and easier to move PVC frame. We went to Home Depot and purchased all the materials to build the frame, as well as made a stop at Canadian Tire to purchase a higher output solar panel and better charge controller. Up next would be purchasing a better battery.
We finally located one of the main flaws in our power system!
After much hunting through the system and troubleshooting, it was discovered that the small heatsink on the LM7805 regulator for the camera was not enough to keep the regulator from entering thermal shutdown when the camera was placed into 1080p operation. After moving the regulator to a much larger heatsink, it seems that the random resets have been cured. As we still have not had enough sunny days, we are on the fence about purchasing a bigger battery for the node. We are still going too low in voltage on the battery within a few hours after dark. If we get a sunny day, we will be better able to evaluate if we actually need a bigger battery. My conclusion so far is that it will be a needed improvement because the current battery can only provide nine hours of power in no/little sun time periods. Good enough for a night’s power, not good enough for a few days cloudyness.
In order to plan out the best places to place network nodes, we have been running some link simulations using https://airlink.ui.com/#/ptp. These simulations make the assumptions that both radios involved in the link are placed on a 15ft mast. (e.g., 15ft above ground level for all links)
We are using Lion’s Lookout as the main node point for these simulations and have tested what should be expected at various places using an EIRP of 30dBm. Results are color coded as to how the software thinks each link location would perform
Take this data with a grain of salt. It is a computer simulation that does not account for trees, only topology is accounted for. Real results could be completely different from what is expected. Also, in real world testing, there will be other radios in our path that could cause signal degrading and other negative effects to our communications.
This simulation doesn’t take into account that as radios are added to our network, they themselves become network “towers” so to say and expand the coverage of the network. Each radio keep track of who is can hear and who it can reach via other radios, which this software cannot simulate.
Family Place – Signal -53Dbm | Link Capacity 84Mbps | Distance 372 Meters
KFC – Signal -55dBm | Link Capacity 84Mbps | Distance 472 Meters
Mc Donalds – Signal -57dBm | Link Capacity 84Mbps | Distance 576 Meters
Fresh Co – Signal -57dBm | Link Capacity 84Mbps | Distance 602 Meters
Shoppers Drug Mart – Signal -57dBm | Link Capacity 84Mbps | Distance 614 Meters
Huntsville Place Mall – Signal -60dBm | Link Capacity 84Mbps | Distance 812 Meters
Great Canadian DS – Signal -64dBm | Link Capacity 76Mbps | Distance 1.29KM
Staples/LCBO – Signal -61dBm | Link Capacity 76Mbps | Distance 1.03KM
Farmer’s Daughter – Signal -64dBm | Link Capacity 76Mbps | Distance 1.4KM
Kawartha Dairy – Signal -65dBm | Link Capacity 76Mbps | Distance 1.58KM
Water Plant – Signal -68dBm | Link Capacity 76Mbps | Distance 2.15KM
Canadian Tire – Signal Blocked – No Link – Distance 897 Meters
CT has a hill behind them that blocks the radio link’s line of sight, making communications not able to happen. Perhaps if CT was to allow our project to place a solar operated node on the roof, it could fill in that area, but that is a far shot.
After turning in our first draft of paperwork on the project roughly a week ago, we have decided the first round of testing puts us in a spot that we should be nearing the time to build the first node into its finalized form and start field testing it.
If the field testing goes as expected, the node might actually be getting close to being able to be placed into operation in the town, once we are given permission.
The makeshift test on the test bench proved to hold up a link speed of 120Mbps+ at roughly 700 feet using around half of the nodes possible power output, this isn’t all that far, but it looks promising for us to deploy an open research network based on this technology. (700ft is 0.2km and is the max testing range we can obtain on our property; the radio claims around 5km line of sight, so I’d say 2-3km is doable, but at roughly half the speed…)
To bring things in to the light, we have sent an email to the council on the town’s website and will be awaiting their response. Hopefully they are willing to work with us on this. But keep in mind, even if they do agree to us putting up the first node, it may be a few weeks before we are able to do so. I checked on the conditions of the lookout today and there is no way anyone is getting up there right now, too much ice.
Speaking of the ice, until the weather gets more friendly to our project, it appears that the node will only be able to operate during the day anyway; further delaying some of our testing. Those SLA batteries just don’t do this 12-20’F weather too well and refuse to recharge in those temps. To be fair, the battery is rated for a temp of 40’F minimum.
It was brought to my attention that our use of firmware written by an amateur radio group may cause fellow mesh builders to class the network as “ham radio” or otherwise be off-put to build out and use the network.
I want to put my foot down on this and say that our project is not ham radio related. The only crossover between us and their project is the firmware used and the fact that we share wireless spectrum with ham radio operators. But, because we are operating as an unlicensed network, we cannot interact with their networks and they cannot interact with ours.
Furthermore, research network users must abide by Industry Canada 2.4GHz unlicensed ISM band regulations. This means you must keep your power levels in check and you are not to modify the equipment outside of offerings from the equipment manufacture. Every piece of equipment must be IC certified to be used.
One of the biggest glaring issues here is that the firmware presents the option to use channels 0, -1 and -2. These are amateur radio only channels and it is illegal to use them without the proper license. And even if you held the proper license, we do not want our network to be on these channels as it would prevent public access, which is the main goal of the project.
We ask that users getting involved in the research network do their studies and homework, and make their best effort to protect the status of the network in eye of fellow spectrum users and hobbyist.
The project is considering a possible shift in how we wish to operate the network. From a public network point of view, it might make better since for us to offer the network using the AREDN (Amateur Radio Emergency Data Network) firmware, but run the firmware under normal, public wifi band rules. By using the AREDN firmware on our network nodes, he system will be able to automatically build out the network and form routes between nodes as people place more nodes online.
This is a useful trait, since it means that the area of data coverage grows each time a new node is added. As long as a user brings a node online in range of an existing node, the project’s reach to new and further away users become easier to grasp.
The AREDN project is located at https://www.arednmesh.org/, and while it is true their firmware is intended for amateur radio use, we should be okay as long as we stay within the ISM (Public Wifi) band and do not modify any equipment outside of options provided by the equipment producer, and as long as we stay within power limits.
For the time being, this topic is being discussed internally as to if this is a direction that we see fit to head down. If the topic passes the vote, the website and documentation will be updated to reflect this change.
An update to this post:
If we decide to use this firmware, we need to be aware of the ISM and amateur radio band overlaps. The network must be setup use higher channels in the ISM only band and must be set to use our chosen SSID to avoid conflict and interference with licensed radio operators. Please remember that our project operates an unlicensed network and that we cannot interfere with licensed operations.
Hello and welcome to the HHN Project’s website. Currently we are doing pretesting of our project’s solution and our first set of project paperwork has been submitted to town hall for review.
While we await their response to our inquiry, let us get some information on the table for you who are interested to read through. This project is both a bit of a social experiment as well as a weather imagery collection project. The main goal is to collect around two-thousand sky pictures per day, catching weather events as they happen. The solution is solar powered, remotely accessed via its own high speed wifi network that should cover a portion of the town and it automatically takes a sky picture every two minutes. (Before someone says that is only 720 pictures per day, we capture a set of pictures every time slot, not just one.)
The social side of the project is to see if people in town, kids and adults, will pick up on the project and connect to it, use the data, contribute to the project, or even build out the network. It uses the public 2.4GHz wifi band and the credentials to join the network are posted on this site for anyone to join. Feel like joinig the network and adding a camera of higher res or slow motion captures, maybe add a networked weather station, you don’t need to ask us to do so. Grab a radio from one of the computer shops in town, register yourself an IP in our registry, setup your gear and get rolling.
Until we hear back from town hall on if they’ll allow this to be a full time thing or not, we aren’t sure how the project will go. All we can do at the moment is wait and see. But if they do allow it, it could turn into a neat network for research and data sharing.