[islandlabs] Launch Date?

Kuczewski, John jkuczewski at bnl.gov
Wed Feb 10 11:56:55 EST 2010

Hey all,

ATM, I have working the start of the power management stuff, reading the +5V rail and monitor for any drastic changes. The rest of the logic to shut down some core components will be implemented later, after I get the rest of the sensors. It is speaking EIA RS-485 and can be controlled via this interface, as long as the commands are in the jump table. I'm also reading 1-wire temperature. So I send it a command and it spits back to me a answer via RS-485. Later it will have a task list and will only send out data via RS-485 (can be changed to RS-232).  

 o Buying the rest of the sensors and start talking to them.
 o Talking to the GPS, tonyb has it IIRC.
 o Writing to SD via SPI.
 o Extensive testing/debugging. 

Now, as for the TNC, I would need help with that. For our purposes, it needs to be all configured on the fly and not just limited to GPS. The pre-built ones seem very limited in that you can only do GPS and you can only have one comment send which is pre-programmed. I would like something that is very literal. You send it a string via UART or other means, and it creates a APRS packet from what you sent it, then converts it via some basic modem (on or off the micro, it doesn't matter) to what would then be connected to the radio. Almost like a KISS TNC. Here is even more of a trick, it must fit within our power budget and must be within a reasonable form factor. Maybe someone would like to be in charge of building one from scratch or buying one that needs to be built that does what we want. It needs to be able to transmit weather, location and general messages. The general messages would be used to monitor the overall health of the micro and how much power is being used... etc. It can be two-way but one-way is just fine for our purposes. 

Any thoughts or suggestions?

I will work on it more today because work is closed and classes are canceled.


-----Original Message-----
From: list-bounces at islandlabs.org on behalf of John Teddy
Sent: Wed 10-Feb-10 01:43
To: Island Labs main mailing list
Subject: Re: [islandlabs] Launch Date?
Also Kuzew, if you need help speak up. There are resources and people we can
reach out to.

A buddy of mine is an electrical engineer. She does sonar systems at
Northrop Grumman. She could definitely be quite helpful if she's willing. I
don't know what stage you're at. Give some update in a percent though, so
60% completion, 90%, 10%, etc etc.

On Wed, Feb 10, 2010 at 12:54 AM, John Teddy <masterjediyoda at gmail.com>wrote:

> I very much agree with Bill's assessment, we need to launch soon. The first
> launch date is the weekend after next, that is less than two weeks from now.
> Kuzew how is APRS coming, can you finish it in time?
> Jonathan, did you find that cell phone? If not are you going to order
> another one?
> We need to test to communications system we use before the launch, we we
> have to do that as well.
> I've volunteered my Subaru wagon to pickup the helium tank, the total cost
> temporarily is $300 ... I agreed to split this with Bill. We'll get a $150
> deposit back from that $300, assuming we don't drop the tank off a bridge or
> ruin it in some way.
> We have everything we need except a proof of concept on the remote
> communications system. The parachute has been bought, I have the camera (my
> camera is the best quality, and will take the best video compared to the
> others), balloon is ready. We have a helium location and a vehicle for
> transporting it. We're coming in on the home stretch here, everyone chime in
> on if you can make the dates, and what you think. Also if anyone wants to
> step up for more funding, that is also appreciated. Who is riding in what
> cars, who is taking their car with them. We should have a system for sharing
> gas prices, and toll prices, etc.
> Next week should be all efforts to assembling the payload, planning that
> all out. We need to make sure this is highly organized and we have step by
> step layout of what will take place.
> Also, when testing the remote communications equipment. We should have two
> teams, and have one team hide the device... and the other team finds it. As
> a practice run, so we are all familiar with the protocols we'll be using,
> and have a real proof of concept for search and rescue.
> -John
> P.S. The balloon launch takes priority over radio show in my opinion.
> On Wed, Feb 10, 2010 at 12:33 AM, Burns, William <burns at cshl.edu> wrote:
>> We're running out of time before I-Con...
>> So.. There are only 5 possible launch weekends:
>> Saturday Feb 20th ? conflicts w/ radio show?
>> Sunday Feb 28th. (I'll be meeting w/ some ham radio guys on Saturday)
>> Saturday March 6th
>> Sunday March 14th
>> Saturday March 20th ? conflicts w/ radio show?
>> I saw the parachute today. It looks good. very light-weight material.
>> We still need to get firmware onto the camera, but John is volunteering
>> his if that doesn't work out.
>> So... I need to get a hose and a fitting to match the helium tank.
>> Then, we need to get an APRS setup, find the cell-phone, or buy a new one.
>> Otherwise, we're down to assembling the payload.
>> I assume that the snow will keep us from meeting this week.
>> I suggest that we assemble the payload next week in an attempt to be ready
>> for the first potential lauch date. (Feb 20th)
>> On launch day we'll need to pick-up a helium tank (at 8:00am?) gather up
>> the chase team, and drive to our launch site. (yet to be picked, but Joe and
>> Amy have done some research on that subject)
>> Figure that we'll spend 3 hours after the launch waiting for, and then
>> finding the balloon landing site.
>> W/ travel time, this could be a pretty full day.
>> Thoughts?
>> -Bill
>> _______________________________________________
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>> List at islandlabs.org
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