Re: [altusmetrum] Change maximum log size TeleGPS

Tim Robinson writes: > I just received a TeleGPS unit and am starting to do some tests before > flying it. Most everything has worked great except I seem to be unable to > change the maximum log size. It shows as configured for 1984 kB (1 > flight). I changed the TeleGPS

Re: [altusmetrum] OpenOCD and LPC11u14

Jared Szechy writes: > Is there some trick to getting the lpc11u14 to communicate over SWD? From > reading the datasheet it looks like SWD is disabled under reset, so I can't > force it to communicate that way. I often have to hold the reset line low while starting the

Re: [altusmetrum] Telemega battery

Tim Navickas writes: > Can the 850 mAh battery support the following in a Telemega > > - sit on the launch pad for up to 20 minutes > - fire a second stage engine > - fire the drogue charge > - fire the main charge > - continuously transmit for the entire flight Yup, that

Re: [altusmetrum] Telemega battery

Tim Navickas writes: > I always ground test but I am using the same matches I use with the > Telemetrum so I assume I should have no problems. Yup, all of our flight computers use the same igniter circuit. -- -keith signature.asc Description: PGP signature

Re: [altusmetrum] OpenOCD and LPC11u14

Jared Szechy writes: > Are there any plans to transition to a newer release of OpenOCD? I'd like to; if you've got patches to make that happen, I'd be delighted to test and merge them. -- -keith signature.asc Description: PGP signature

Re: [altusmetrum] AltosDroid Anomaly?

W7AMI writes: > I flew my TeleGPS equipped rocket yesterday. It was a nice flight to > 10K feet and as usual AltosDroid walked me right to the rocket. No > wandering around looking for it. I had an anomaly that I didn't > understand. During the flight I received

Re: [altusmetrum] New Member

Scott Myers writes: > I just joined this Altus Metrum mailing list. I'm trying to get a bit more > information and learn more about the Telemetrum before I purchase one. Welcome! This list doesn't generally get a lot of regular traffic, so if you've got questions about

Re: [altusmetrum] New Member

Scott Myers writes: > My first question is on the uplink/downlink frequencies. It simply states > 433 MHz. I assume this to be an approximate frequency in the 70 cm band and > not the actual exact frequencies. Rarely is something right at > 433.000 MHz. Right, the radios

Re: [altusmetrum] Telemetrum Issues

"Tim Navickas" writes: > I recently purchased a third Telemetrum and I am having issues with it. > When I use the tele dongle and click on the flight mode tab I can get the > system to show GPS lock but cannot get out of the startup state. It will > also not show the

Re: [altusmetrum] Web Site Down?

Casey Barker writes: > FYI, I went to download the latest firmware and noticed altusmetrum.org > fails to resolve in DNS. Hrm. Appears to work for me; I know Bdale was doing some server maintenance in the last day or so, perhaps something was up this morning? -- -keith

Re: [altusmetrum] Cheap tablet for AltOS?

Plugger Lockett writes: > Not sure about andriod tablets but the recent windows tablet thread on TRF > had this $80 unit which should run the windows based AltOS software fine. > It's so cheap I'm considering picking up one as a backup unit for the > field. It depends

Re: [altusmetrum] TeleGPS Question

w7ami writes: > I have a question regarding an issue with my TeleGPS this weekend at > NXRS. It quit transmitting data almost exactly at apogee (12,000 feet) > but it continued to save data to the EEPROM until it lost power at main > chute deployment. Ballistic

[altusmetrum] [AD] Altus Metrum releases TeleMini v3 and AltOS 1.7

Altus Metrum releases TeleMini v3 and AltOS 1.7 TeleMini v3 is a major upgrade to our TeleMini v1 product. TeleMini remains the worlds smallest dual-deploy altimeter with built-in telemetry and radio beacon for tracking. * Recording altimeter for model rocketry * Supports dual deployment (can

Re: [altusmetrum] Telemetrum question

Tim Navickas writes: > With Airfest questions coming up soon I have started working with my all my > Telemetrums and have some questions. > > 1. With the popularity at Airfest of the Telemetrum I do not want to > be on the same channel as others, even though I know you can.

Re: [altusmetrum] Telemetrum V2 antenna pad ripped off board.

Chris Attebery writes: > I finally got around to repairing my Telemetrum last night. I soldered an > SMA jack to the board and then used a jumper wire from the jack to the > output capacitor. I fired it up this morning and I'm able to see it in > AltOS. Good work!

Re: [altusmetrum] TeleGPS reciever

Tim Robinson writes: > I have. Works very well. Nice to have the battery voltage as part of the > APRS packet. It also reports the number of satellites in view (when unlocked) or in solution (when locked). That lets you know when it's ready for launch. -- -keith

Re: [altusmetrum] Behaviour of EasyMini on high altitude flights exceeding sensor range

Reinhard Rath writes: > Hi all, > > for a group project I'm looking for a backup altimeter for drogue > deployment. Preferably, it should be small enough to be mounted > horizontally within 68mm diameter. It also shouldn'trequire a vertical > orientation for operation

Re: [altusmetrum] Using Bluetooth on the Mac

Edouard Lafargue writes: > I am putting the finishing touches to my very first rocket with > electronics, and configuring the TeleMetrum I just received. > > My ground station is the Bluetooth-enabled version, and I was hoping to > use bluetooth communications on the

Re: [altusmetrum] AltosUI v1.8.1 (and 1.8.2) (+ EasyMini?) bug in acceleration, speed, etc

Bryan Duke writes: > :) Our emails high-fived on the way out. > > Hmm. Are you not seeing the Mach & acceleration differences in AltosUI > like I showed in the screenshots? What you labeled as 1.8.1 looks like a lot older version -- it doesn't have the device and firmware

Re: [altusmetrum] AltosUI v1.8.1 (and 1.8.2) (+ EasyMini?) bug in acceleration, speed, etc

Bryan Duke writes: > Just as I got done testing this in 1.8.1, 1.8.2 came out — so, I retested and > still have a bug report. > > I flew another flight on my 29mm min-diameter rocket this weekend & > the data views in AltosUI looked incorrect. The graphs & flight stats > in

[altusmetrum] [AD] Altus Metrum announces TeleGPS v2.0 and AltOS 1.8.2

Altus Metrum announces TeleGPS v2.0 and AltOS 1.8.2 Announcing TeleGPS v2.0 We're pleased to announce the next version of our GPS-enabled logging radio tracker and beacon, TeleGPS version 2.0. This new version incorporates the same higher power radio as TeleMetrum and TeleMega for longer range.

Re: [altusmetrum] NMEA input to a TeleMini?

Bryan Duke writes: > Yeah, it all depends on their actual intent behind their “No > modifications to these commercially manufactured units are allowed” > verbiage. It also depends on what the record-observing Prefect views > as ok. I’d rather not have anything questioned

Re: [altusmetrum] NMEA input to a TeleMini?

Bryan Duke writes: > Thanks Keith, this helps a ton! It’s great to hear that those pins are > exposed & there aren’t any giant road blocks. The EEPROM logging would > definitely be nice, but the lat/long telemetry is priority 1. > > I’ll start digging through the code once

Re: [altusmetrum] Getting a Telemetrum 2.0 into pad mode

burnwuf...@aol.com writes: > Suspect that the acceleration sensor has drifted a little. Is there a > way to get into the code and change a constant? Yes, you can use a serial terminal to do this today, or you can wait a while until I've got the code integrated into the next release. -- -keith

Re: [altusmetrum] NMEA input to a TeleMini?

Bryan Duke writes: > Hi everybody. I posted on the Facebook group, but someone there suggested I > try the mailing list instead… > > I’m putting a TeleMini in a nosecone for a 24mm rocket that I’m hoping > to break the TRA G-motor record with. There isn’t enough room in the

Re: [altusmetrum] Exporting TeleGPS data to KML file for google earth

"Tim Cubbedge" writes: > I recently upgraded to AltOS 1.8.2 > > I uploaded some flight data yesterday and when I try to export to a KML > file, the file size is 0 KB. When I attempt to open KML file, I get the > following message: > > "No results - KML file empty" > > Have

Re: [altusmetrum] Upgrading TeleBT firmware using a TeleMega?

Stewart Campbell writes: > HI. I have a TeleBT (v1.1 hardware) that I want to bring up to the > latest firmware. Can I use my Telemega (V1.0b hardware) to do that? No, we never added the pair-programming code to the TeleMega device. There haven't been any big changes to the TeleBT firmware

[altusmetrum] [AD] Altus Metrum announces AltOS 1.8.6

Altus Metrum announces AltOS 1.8.6 Announcing AltOS 1.8.6 AltOS 1.8.6 contains ground station software bug fixes for configuring flight computers and firmware bug fixes for controlling TeleMega and EasyMega additional pyro channels. People with multi-staged projects using EasyMega or TeleMega,

Re: [altusmetrum] TeleMega and TeleBT questions

Plugger Lockett writes: > Hi Keith, > > Apologies for spamming the mailing list but I've had some time today to > look into a few things and that's brought up a couple questions. > > Above you mentioned that it's possible to have both APRS and the telemetry > digital protocol running

Re: [altusmetrum] TeleMega and TeleBT questions

Plugger Lockett writes: > FANTASTIC! Thanks for the prompt response Keith. > > Can you also confirm if the TeleMetrum v1.2 is/isn't APRS capable? That's right -- the radio chip we used on TeleMetrum v1 boards can't transmit for long enough at a time. > Basically I want to have the option to

Re: [altusmetrum] Altus Metrum Products And RF Interference

Bud Woodling writes: > I recently acquired a Pico APRS GPS Tracker with a 1W 2M band transmitter. > I would like to use it for rocket tracking and plan to ground test it > thoroughly before I fly it. > I am wondering if anyone is aware of any reported RF interference issues > with any of the

Re: [altusmetrum] Connection issues with TeleBT on AltosDroid

Bdale Garbee writes: > "Keith Packard" writes: > >> We haven't ever seen a working chip stop working, so you should be >> fine. > > Is that really true? I know we've replaced some units that made it to > customers, but I don't recall offhand whether they

Re: [altusmetrum] Connection issues with TeleBT on AltosDroid

w7ami writes: > Keith, > >   I have a TeleBT V1.1 unit with the serial number in the suspect > range.  I only use it to listen to my TeleGPS units.   It is my > understanding that I should never see the bad chip issue with my unit > even if it did have problems since I don't transmit with

Re: [altusmetrum] altusmetrum Digest, Vol 86, Issue 17

Stewart Campbell writes: > My TeleBT actually worked the first couple of times I used it, then it > was no longer functional. May have been temperature related as I have > seen the Tx behaviour change as it warmed up. I can imagine it working > on the field in our winter, then failing later

Re: [altusmetrum] Programming serial number on TeleBT V1.0?

Stewart Campbell writes: > Hi, I have a TeleBT V1.0 that had a defective CC chip from that earlier > batch (you are already sending me a replacement, thanks!) > > On the existing TBT have: > > * Reworked the board and replaced the chip > * Blasted the micro with 1.8.5 firmware for the

Re: [altusmetrum] Connection issues with TeleBT on AltosDroid

Chris Attebery writes: > Well, that was it. I fired up the TeleBT then turned on the tablet. Once > the tablet booted up I fired up AltosDroid and the TeleBT connected > immediately. I need to put a note on the TeleBT to fire it up before I > start the app. Yeah, I tried (without success) to

Re: [altusmetrum] Current limiting with separate pyro battery

Gary Lech writes: > It's another question from a newbie TeleMega user. I've read thru all > the documentation, nice job on the manual BTW, but I'm wondering what > the current rating is on the FET output switch. An unrestricted > Lithium battery can pack quite a punch. Should I be adding a

Re: [altusmetrum] TeleMega and Windows BS

Gary Lech writes: > Help. I have tried 2 different TeleMegas (v3.0) on 2 different PCs > running Windows 7 and can't get it to stay connected long enough to > configure either one. It will connect for about 5 seconds and then it > drops out. I suspect it's a Windows driver/comm port issue issue.

Re: [altusmetrum] APRS time slot?

Gary Lech writes: > Is there a way to set a time slot value for APRS transmissions? It's > not a must have but it would be nice when listening to several > TeleMegas on the same frequency. Oh, that's a good idea -- never considered it myself, but it make sense as we've got GPS. -- -keith

Re: [altusmetrum] TeleBT on both USB and BT at the same time

Gary Lech writes: > Holey moley I tried using my TeleBT connected to Windows using the USB > port and then connected my Android smartphone via bluetooth at the > same time and was surprised to see that it works. I'm able to monitor > 3 TeleMegas simultaneously on both a laptop and a smartphone.

Re: [altusmetrum] APRS time slot?

Plugger Lockett writes: > Ah of course. Thanks Keith, I didn't even consider the digital telemetry > side of the equation from an Altus hardware perspective. > > I also didn't realise you implemented a separate RDF beacon, I just always > assumed the tones I heard over my handheld were the

Re: [altusmetrum] APRS time slot?

Plugger Lockett writes: > Power them up at set time intervals? Sure it's low tech, but IIRC that's > what Nic Lottering used to do with rockets where he would run more than one > BRB GPS tracker to allow him to tune to one frequency and receive packets > from both transmitters without them

Re: [altusmetrum] Newbie would like settings confirmation

Gary Lech writes: > Hopefully the list will accept these embedded screen shots. I've got > this altimeter configured identical to one that has flown ARLISS in > the past but just want to make sure that my understanding is > correct. ARLISS is unique in that it ejects a payload precisely 6 >

Re: [altusmetrum] TeleMega and TeleBT questions

Plugger Lockett writes: > I plan on playing with the radio output options a bit more to see if I can > get the altitude value to also output via serial. I'll let you know if I > have any further success. Thanks! The altitude data in uncompressed format is encoded in the 'comments' field;

Re: [altusmetrum] TeleMega and TeleBT questions

Gary Lech writes: > Greetings, > I've been studying the TeleMega product in advance of a purchase. From > what I've read in the documentation the TeleMega is capable of > transmitting APRS packets such that it can be decoded with my TH-D7A > or the MobilinkTNC. But in order to receive in-flight

Re: [altusmetrum] One more newbie TeleMega question

Gary Lech writes: > I've looked high and low and kinda know the answer but thought I'd ask > anyway. Can the TeleMega be configured using the AltosDroid version? Nope; we haven't gotten around to writing any of that code yet. -- -keith signature.asc Description: PGP signature

Re: [altusmetrum] Telemega

"Tim Navickas" writes: > I had a flight at Airfest using a Telemega that I have some questions on. I > launched a rocket with a M3100 and it went to pieces in a few seconds!!! My > questions are what can I make of the data and how do I tell if the Telemega > is OK. Can you send along the

Re: [altusmetrum] Frequency response of extra pyro inputs on TeleMega?

Stewart Campbell writes: > Hi, >I am using the extra four inputs on the TeleMega to provide logging > of my servo PWM commands on my Vertical Trajectory System. I was > wondering what filtering you have on those inputs and what the logging > rate is please? It sounds like you're just

Re: [altusmetrum] Frequency response of extra pyro inputs on TeleMega?

Stewart Campbell writes: > Sounds like I need to set up a compile system :-) Easiest to do on a Debian system; all of the tools necessary are available there (we maintain some of them). -- -keith signature.asc Description: PGP signature ___

Re: [altusmetrum] TeleMega 3.0 Firmware

Casey Barker writes: > Thanks so much! I had downloaded the latest altos package with the plan of > field-upgrading our units, but hadn't noticed the extra file. I managed to > get enough data service to download it. Board working now. Awesome. We're both quite sorry to have left this out of

Re: [altusmetrum] EasyMega apogee config recommendations for flights over 100k'

Plugger Lockett writes: > Yea, that's what I'm trying to avoid, hence all the questions. So to > confirm, you're recommending using the primary Apogee channel and then add > to that a 10 second delay in the "Configure Flight Computer" window in the > "Apogee Delay (s)" field? I think what

Re: [altusmetrum] EasyMega apogee config recommendations for flights over 100k'

Plugger Lockett writes: > Any advice in this area would be much appreciated folks. How high is the flight expected to be? For flights "close" to 100k', you can use EasyMega pretty much as-is -- the kalman filter will use both baro and accel data up to the limits of the baro sensor (about 30km,

Re: [altusmetrum] Discrepancy between recorded log and Android app?

Edouard Lafargue writes: > Hi! > >I noticed today that there was a significant discrepancy between the > Android app max altitude that was recorded on a flight (719m), and the same > max altitude as saved on my Telemetrum (676m), and I was wondering if you > have any

Re: [altusmetrum] NMEA input to a TeleMini?

Bryan Duke writes: > Thanks a ton, Keith. > > Like you mentioned a while back, I was hoping I could have the USB > start up normally, wait a bit, disable the USB & enable the serial > port. Can’t I just call ao_usb_disable() before ao_serial_init() ? Yes, and then flip the

Re: [altusmetrum] NMEA input to a TeleMini?

Bryan Duke writes: > Great. I’ll do that. > > Just to make sure I’m not missing anything... there doesn’t happen to > be a TeleMini simulator I can run on Debian, is there? It’d be great > to not have to deploy to the device for testing every time I change a > line of code.

Re: [altusmetrum] Kenwood Th-D72 and Telemini

Jonathan DuBose writes: > Can anyone tell me how to set up the Kenwood Th-D72 to receive the > directional signals from the Telemini? All you get is a beep, which you use with a directional antenna to figure out which way to TeleMini. It's not as easy as GPS, but it

Re: [altusmetrum] TeleMetrum peak altitude reporting

Bryan Duke writes: > Lazy post… so that I don’t have to dig through the code, can anyone > share roughly how the calcs are done for the max altitude reporting of > the TeleMetrum on the AltosUI Flight Statistics tab (like the attached > image from an EasyMini flight)? Does

Re: [altusmetrum] TeleMetrum peak altitude reporting

Bryan Duke writes: > Cool, thanks. Their rules say they want the baro data along with the > GPS data. I’ll get them everything if I manage to break those records. Yup, KML export provides both curves. > The plan is for J & K attempts over Memorial Day at Delamar Lake, NV >

Re: [altusmetrum] TeleMetrum peak altitude reporting

Bryan Duke writes: > Thanks Keith. It’s great that the GPS max height is reported & graphed > separately. That should work great. TRA records require GPS height data. Note that you can export a KML file, which is what the TRA records folks generally want to see. -- -keith

Re: [altusmetrum] TeleMini v3 firmware update wiring?

Bryan Duke writes: > I haven’t been able to find a definitive wiring diagram for updating > firmware for the TeleMini v3. First off, there's no big need to update TeleMini firmware at this point; the only fix relevant is to make the beeper sound when power-on self-test

Re: [altusmetrum] Dev setup issues

Bryan Duke writes: > I’m getting warnings when building firmwares about > ../kernel/ao_stdio.c:150 not being reachable, but it looks like > everything built. That's sdcc -- you don't need to build the 8051 firmware for hacking arm stuff :-) > Sounds like it’s almost time to

Re: [altusmetrum] Dev setup issues

Bryan Duke writes: > First issue is with the Android SDK. Platform 23 looks to be the only > one supported on sid, but configuration.ac checks for something >= 17 > and also =10. Is the check for 10 just old code that can be removed? I > can’t even find 10 to install, so it’d

[altusmetrum] [AD] Altus Metrum announces AltosUI for iOS

Altus Metrum announces AltosUI for iOS Our friends at Iron Sheep Productions, LLC have created the AltosUI iOS application to bring Altus Metrum application support to Apple iPhone and iPad devices. Available now in the Apple App Store, AltosUI for iOS monitors your rocket flight through a TeleBT

Re: [altusmetrum] NMEA input to a TeleMini?

Bryan Duke writes: > Reviving this thread… > > I’m starting my hacking to get the TeleMini v3 to read an external > u-blox GPS. I’m doing serial port config stuff. It looks like I have > to set a few things in ao_pins.h, but I’m not sure which serial 1 > settings the TeleMini

Re: [altusmetrum] Fwd: Help with TeleMega setting for two stages

Gordon Bain writes: > Can anyone tell me what I did wrong? You set the 'flight state before' value to 'coast', which means that the igniter will not fire unless the rocket has not yet reached 'coast' state. In this case, I think the settings you'd want are 'after motor 1',

[altusmetrum] [AD] Altus Metrum announces TeleMetrum v2 back in stock and AltOS 1.8.5

Altus Metrum announces TeleMetrum v2 back in stock and AltOS 1.8.5 TeleMetrum v2 back in stock We're pleased to announce the current version of our classic flight computer, TeleMetrum v2 is back in stock. TeleMetrum v2 is a dual deploy flight computer with 2 pyro channels, 105g accelerometer,

Re: [altusmetrum] Fwd: Help with TeleMega setting for two stages

Bdale Garbee writes: > For a simple 2-stage flight, I like to just use after first motor > burnout, within a tilt limit of vertical, and a fixed time after all > other conditions are met. Note that during the 'time after other conditions are met' period, the flight computer will

Re: [altusmetrum] Frequency response of extra pyro inputs on TeleMega?

Stewart Campbell writes: >> # apt install git > Seemed to work >> # apt build-dep altos > Seemed to work >> $ git clone git://git.gag.com/scm/git/fw/altos > Tried this at $ prompt > Fatal: Could not create work tree 'altos': Permission denied. > Tried again at # prompt > Fatal: remote error:

Re: [altusmetrum] Error in AltosUI 1.8.6 under Mac OS

Erik Ebert writes: > I just ran into the same issue. My java control panel shows java 8, > but that error message seems to indicate that it is trying to execute with > a much earlier version of java. I figured out what was going on with this. When you install Java 8 from Oracle, it only

Re: [altusmetrum] Error in AltosUI 1.8.6 under Mac OS

Casey Barker writes: > Thanks, Keith. This issue is fixed for me. yay! -- -keith signature.asc Description: PGP signature ___ altusmetrum mailing list altusmetrum@lists.gag.com http://lists.gag.com/mailman/listinfo/altusmetrum

Re: [altusmetrum] Frequency response of extra pyro inputs on TeleMega?

Stewart Campbell writes: > Hi Keith, > Thanks for the tips. Please remember I have almost zero Linux experience! > > So, what I have done so far: > > * Created a VM on a windows machine > * Installed Debian to the VM > * Installed most of the altos stuff (commands mentioned below) > * Got the

[altusmetrum] [AD] Altus Metrum announces AltOS 1.8.7

Altus Metrum announces AltOS 1.8.7 Announcing AltOS 1.8.7 AltOS 1.8.7 contains ground station software changes to fix Google Maps access, and incompatibilities with Mac OS X Java versions. Version 1.8.7 includes firmware for TeleMega v3.0 devices, and a radio calibration fix for TeleBT v4.0

Re: [altusmetrum] Frequency response of extra pyro inputs on TeleMega?

Stewart Campbell writes: > Hi Keith, >I want to compile the TeleMega firmware for the updated logging > rate. Is there a single document somewhere that walks me through the > installation of Debian and the altos compile environment? I have been > able to set up a VM and can now work on

Re: [altusmetrum] altusmetrum Digest, Vol 88, Issue 6

Plugger Lockett writes: > Gents, > > Thanks for the thread replies. I've just realised that it would probably > make more sense if I attempt to accomplish this myself. I've got two > TeleDongles so as you said I should be able to flash one with the other > assuming I've got the pair programming

Re: [altusmetrum] EasyMega apogee config recommendations for flights over 100k'

Plugger Lockett writes: > Just a thought as it might be simpler to implement that when compared to > some of the other avenues you've been investigating. Magnetic apogee detection relies on the airframe tilting over right at apogee; you can already use 'tilt angle > 90' if you want. I'm

[altusmetrum] [AD] Altus Metrum announces EasyMega v2.0 and AltOS 1.9

Altus Metrum announces EasyMega v2.0 and AltOS 1.9 Announcing EasyMega v2.0 We're pleased to announce the next version of our EasyMega flight computer. Version 2.0 is feature compatible with version 1.0, incorporating a new 200g high-g accelerometer along with the updated 9-axis IMU first used

Re: [altusmetrum] Telemetrum Graph Question

"Tim Navickas" writes: > Does this graph make sense? Why is max height and Max GPS Height so > different. The Max height agrees with my backup altimeter. This was flow > in Argonia Kansas elevation ~1100 feet. Looks like GPS didn't get a solid lock at apogee. Can you send along the full

Re: [altusmetrum] TeleGPS V2

"Tim Navickas" writes: > It has been a while since I used my TeleGPS and I am having problems. > I can connect to it via ALTOS with a USB cable but not with the tele > Dongle or Tele BT. How are you trying to connect? TeleGPS doesn't support the duplex packet mode for remote configuration. If

Re: [altusmetrum] TeleGPS V2

Bdale Garbee writes: > I think the green LED on the processor should flash briefly during power > up, but the flash might be short enough to be hard to catch? Then I > think that LED blinks every 3 seconds once GPS lock is acquired. Did I > get that right, Keith? If so, we should probably add

Re: [altusmetrum] TeleLCO

"David W. Schultz" writes: > But in block chain mode the current checksum will depend on all previous > checksums. What happens when a packet gets dropped? It's a packet protocol, not a stream protocol. Each packet is checksummed separately. > How do you prevent someone from recording a valid

Re: [altusmetrum] TeleLCO

"David W. Schultz" writes: > My favorite source of entropy is the user. Run something like a linear > feedback shift register (or just run AES over and over) until the user > does some randomly timed thing. In other words, shuffle the bits until > the user stops it. For bonus points, save the

Re: [altusmetrum] TeleLCO

"David W. Schultz" writes: > But even with a 32 bit counter attacks are still possible, it just takes > more time. If the count always starts at zero, then I can still build a > library of packets and when they will be good. Usable the next time the > system restarts. Starting with a random

Re: [altusmetrum] TeleLCO

"Keith Packard" writes: > I think it would be sufficient to just add a 64-bit random nonce to the > packets and leave the rest of the protocol alone. Oops. For this to work, the pad boxes would have to remember the nonces seen before and ignore them. A longer time stamp in

Re: [altusmetrum] EasyMini does not come up in Idle mode

Scott Mcintosh writes: > I can not get my EasyMini to come up in idle mode. > > Regardless of whether it is connected to the computer or not, when > powered on It beeps out what I interpret as a: dit brap dah dah dah > dah We should make recordings of these sounds so you can actually tell

Re: [altusmetrum] altusmetrum Digest, Vol 90, Issue 3

Scott Mcintosh writes: > Hum. Looks like the attachment was removed. How would you like me to >send this? You can contact me directly at the address below. p If you sent it back to me at this address (kei...@keithp.com), I should get it without trouble. -- -keith signature.asc

Re: [altusmetrum] Gökbörü Rocket Team

GÖKBÖRÜ ROKET writes: > Hello there, > I have a question. Where can I get the program of the telemetrum card? All of the software for our devices is available from https://git.gag.com/?p=fw/altos;a=summary -- -keith signature.asc Description: PGP signature

Re: [altusmetrum] BALLS Project

Craig Klimczak writes: > Are there any special considerations for setting up the TeleMega for > flights to over 100,000 feet?  Yup, 100k' is where the baro sensor ends and you end up flying on accel alone (really, it's just coasting at that point, so even the accel is reading 0). This means

Re: [altusmetrum] BALLS Project

Casey Barker writes: > The *Megas use a Kalman filter to fuse both accel and baro > data into the model, up to 100k', so I don't think the apogee detect should > be all that sensitive to off-vertical flight. Older *Mega firmware would lock out the baro sensor above mach 1. Flying well above

Re: [altusmetrum] BALLS Project

Craig Klimczak writes: > Casey and Drew pointed out that at over 100K the exact timing of > apogee will not be that big of deal. There is not enough atmosphere to > zipper the rocket. Yup. If you've seen a descent plot for any of these flights, it's parabolic until you get down to about

Re: [altusmetrum] BALLS Project

Craig Klimczak writes: > Your're right.  :-)   I really don't understand what the > accelerometers are reporting. I assumed that the accel would detect > the de-acceleration as the rocket reached apogee, reach a point of > zero acceleration and then start accelerating back toward Earth. Uh.

Re: [altusmetrum] BALLS Project

Clay and Carly Dunsworth writes: > Sorry for my response, I guess we said the same thing, except gravity > is why the mass is important for thrust to weight ratios during the > burn. So if you update the code for the moon, we could launch from > there to mars cheaper. Yay! Let's go! --

Re: [altusmetrum] Exposing EasyMini to ejection pressure spikes on high altitude flights

Bryan Duke writes: > The foam I’ve used in this case looks like the stuff here: > http://flyingeinstein.com/index.php/tutorials/barocover > > There are forum posts about people using the black foam that hard drives are > packed in, the foam on the inside of those squishy sanding blocks, and >

Re: [altusmetrum] Exposing EasyMini to ejection pressure spikes on high altitude flights

Bryan Duke writes: > One other thing I haven’t tried on a rocket is the technique that some > quadcopter/drone pilots use on their baros of putting a little piece > of foam on the top of the sensor. They do it to help smooth out the > wind flowing around the sensor so that it gets smoother >

Re: [altusmetrum] Exposing EasyMini to ejection pressure spikes on high altitude flights

Reinhard Rath writes: > For a group project, I'm looking into replicatingfunctionality similar > to the Jolly Logic Chute Release, but with a pyro cutter instead of a > servo releasing a rubber band. > > For mechanical reasons, the EasyMini would be mounted in the nose cone > and subjected to

Re: [altusmetrum] Need help for TeleMega

Gary Lech writes: > Greetings,I have a TeleMega SN: 1240 that is part of the ARLISS fleet > with an unknown history. I'm unable to communicate with it using > either USB or the TeleBT. When powered up it gives me an unusual beep > code:dah dit dit dit ditI didn't see it listed in the manual. I

Re: [altusmetrum] Recovering data from CRC error

Bdale Garbee writes: > Reinhard Rath writes: > >> Is there a straightforward way to recover at least some data if a >> readout results in a CRC error? > > Not easily, but Keith has been known to extract useful information from > a raw dump of the flash contents... CC'ing him for an explicit

Re: [altusmetrum] Recovering a failed TeleDongle v0.2

Casey Barker writes: > The serial on this unit is #373. I tried using ao-load (Ubuntu 16.04, altos > 1.6-1) to load a couple of different firmware revs, but it wanted a "map" > file, which I eventually figured out was a symbol table I didn't have. So > on a whim, I tried ao-rawload, and that

Re: [altusmetrum] TeleGPS Memory

chuck fauser writes: > Hey guys,I used my TeleGPS for the first time this past weekend. I few > two separate flights (one each day) and used the TeleBT to walk right > to the rocket both times. Today when I went to download the flight > files, I find only one file on the TeleGPS and it is

Re: [altusmetrum] Recovering a failed TeleDongle v0.2

Casey Barker writes: > I'm pulling an old rocket out of mothballs to fly at NAR NSL, so I started > by updating firmware. I updated my old TeleMetrum v1.1 to AltOS 1.87 and > (ignoring the manual stating it wasn't necessary) figured I might as well > upgrade my TeleDongle v0.2 while I had the

Re: [altusmetrum] Gökbörü Rocket

GÖKBÖRÜ ROKET writes: > Hello, we have a question. Our telemetrum and teledongle do not have red > pins and red cable in our device. If you show us their connection diagram, > we can link them here. this is a very important and urgent matter. we > need to train the competition. You should

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