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Type: Posts; User: Don Kelly

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    mjs513 beat me to it, was going to suggest...

    mjs513 beat me to it, was going to suggest sparkfun lib. i just got the adafruit 85 in as well, but am still busy with some SDR work so not sure when i'll get to it. the SPI interface did not work...
  2. Thread: uNav INS

    by Don Kelly
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    152,825

    Brian, Thanks for posting the update. Looking...

    Brian, Thanks for posting the update. Looking forward to trying this out!

    I've just got my own GPS SDR running using a HackRF front end and Linux box for the SDR code. Would be awesome to get the...
  3. Thread: uNav INS

    by Don Kelly
    Replies
    709
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    152,825

    Willie.from.texas, Where are you in TX? I'm in...

    Willie.from.texas,
    Where are you in TX? I'm in SE Houston. Don
  4. Thread: uNav INS

    by Don Kelly
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    152,825

    The simpleRTK boards are great. I love the...

    The simpleRTK boards are great. I love the built-in xBee radios, super simple to setup and test. They have some really good products!
  5. Thread: uNav INS

    by Don Kelly
    Replies
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    @u_cap, I'm interested in it as well, let me know...

    @u_cap, I'm interested in it as well, let me know what you hear from Mike please.

    On a separate note, I recently have got the gnss-sdr (GPS software defined radio) software running on a linux...
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    @mjs513, awesome! The BNO080s are really...

    @mjs513, awesome! The BNO080s are really interesting. I'm wondering if they'll release a new chipset soon, as this has been out for awhile now. Another thing of great interest to me is at what point...
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    @defragster Great!

    @defragster
    Great!
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    Tested the T4.1 prototype with my stepper motor...

    Tested the T4.1 prototype with my stepper motor drivers and libraries yesterday, all works fine.

    Also got my PJRC order in for a couple of production T4.1s and memory chips!

    Don
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    Just tested the T4.1 (and T3.6) for recording...

    Just tested the T4.1 (and T3.6) for recording uBlox F9P GPS data (NMEA RMC messages) at 20 Hz to SD. Works like a champ, with Pete's help on some code mods. See this thread "Stream Data from Serial1...
  10. Pete, Your tweak works, amazing! It now logs at...

    Pete,
    Your tweak works, amazing! It now logs at 20Hz cleanly. Tested on the T4.1 just now. Thx for the suggestions!

    $GNRMC,130049.75,A,2936.6095171,N,09506.5759320,W,0.050,,090520,,,A,V*06...
  11. Pete, Your trick works. Thx. Here's what I see...

    Pete,
    Your trick works. Thx. Here's what I see now (on both the T3.6 and T4.1):

    1. 10Hz NMEA RMC messages write to SD card just fine. I can also tested doing other tasks in the loop (blinking...
  12. Thx, I'll try both these and let you know what...

    Thx, I'll try both these and let you know what happens, I appreciate it.
  13. Stream Data from Serial1 to SD Card, Teensy 3.6

    I do a lot of GPS testing, and I'd like to just capture NMEA data (RMC messages) as it streams to the SD card on Teensy 3.6 Serial1. I have great success using the Sparkfun OpenLog SD card with T3.2s...
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    Thanks defragster, I've got a dozen tests I'm...

    Thanks defragster, I've got a dozen tests I'm planning to run through, including displays, IMUs, DC and stepper motors, SPI motor encoder, AHRS algorithms, GPS interfaces and datalogging, and more....
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    Still stepping through some simple regression...

    Still stepping through some simple regression testing, so please ignore if others have done. Just tested SD lib functionality, and examples ran fine. Was able to write and read and list files with no...
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    19991 Completed next regression test, BNO080...

    19991

    Completed next regression test, BNO080 on SPI. Looks fine, running Sparkfun BNO080 lib, sample quaternion output:

    .01,-0.02,0.44,0.90,3.14,19.89Hz
    0.01,-0.02,0.44,0.90,3.14,19.89Hz...
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    I'm doing simple regression testing with a dozen...

    I'm doing simple regression testing with a dozen or so of my lab setups, just to make sure interfaces and all look good. I just tested the BNO080 IMU with the Sparkfun lib over I2C, all looks good to...
  18. Just a heads-up that you may want to calibrate...

    Just a heads-up that you may want to calibrate your sensors, especially the mag sensors. Otherwise your yaw will not be relative to North, and will drift pretty badly. Lots of info out there on...
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    If you're new to arduino, suggest you get some of...

    If you're new to arduino, suggest you get some of the basic arduino examples running in the Arduino IDE first, like Blink. Once you see how arduino sketches work, then install the Ublox library, hook...
  20. Thx, will check it out.

    Thx, will check it out.
  21. Teensy/Arduino Configuration Management Tool

    Is there a friendly CM tool for Teensy / Arduino that captures the whole Teensy environment? It'd be nice if there was a simple tool that captured:
    - The current C code (sketch) with all tabs
    - A...
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    I use I2C without INT, I just use a qwiic...

    I use I2C without INT, I just use a qwiic cable19826.

    I'm getting ready to mount a BNO080 on a larger (SuperDroid Robots model) self balancing robot, and I'll use I2C for that since I'm already...
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    For SPI, I get the same thing with delay(2000) in...

    For SPI, I get the same thing with delay(2000) in the void setup. If I set it to delay(2), delay(20), delay(200), it runs fine, but locks up if set to delay(2000). weird.

    For I2C, it runs fine...
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    See above post for what I see with SPI. It's...

    See above post for what I see with SPI. It's pretty fast. Here's what I see running same code on I2C:

    227.58 Hz
    228.05 Hz
    375.38 Hz
    376.08 Hz
    376.51 Hz
    376.93 Hz
    193.72 Hz
    373.55 Hz
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    DavidG, Very cool! Works great. Here's what I...

    DavidG,
    Very cool! Works great. Here's what I get with the T4.0:

    405.84
    369.28
    484.73
    350.39
    427.35
    446.23
    392.16
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    DavidG, looks awesome, thx! Will take me a couple...

    DavidG, looks awesome, thx! Will take me a couple days to get time to try this, but looking forward to trying your mods!
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    Great, thanks. I have the INT and WAK connected,...

    Great, thanks. I have the INT and WAK connected, just wasn't sure if that was right, so thanks. Will try your 1K updates out...

    By the way, has anyone been able to consistently get the...
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    That's really cool, are the quat updates also at...

    That's really cool, are the quat updates also at 1Kz, or is it just gyro 1k updates? Are you connecting the INT pin on the BNO080? I was unsure if that does anything or not.
  29. You need to apply a filter to the raw sensor...

    You need to apply a filter to the raw sensor measurements in deg/s and m/ss to angular degrees. The easiest is called a complementary filter, others include Madgwick and Kalman filters. Joop Brokking...
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    Hey, great to hear from you. I'm using an "if...

    Hey, great to hear from you. I'm using an "if (myIMU.dataAvailable() == true)" line to grab my data, so I'm not really using a fixed time between reports. I guess I need to think about it some more....
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    BNO080 Observations

    I've been doing some testing on the BNO080 IMU and have found some things that I thought might be interesting to others. I created two perma-boards, one with T4 connected to a BNO080 via I2C, and the...
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    manitou, thanks. Yes, I'm aware of micros(), but...

    manitou, thanks. Yes, I'm aware of micros(), but need it relative to time of day. I searched for RTC registers on the forum and found this link:
    ...
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    Update: Got a 1sec RTC interrupt timer working...

    Update:
    Got a 1sec RTC interrupt timer working (derived from code posted in the forum). So I just need to add my own uSec sub-timer. But am still surprised there's not a lib out there that allows us...
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    Accurate Timestamp On T4.0

    I'm testing out TimeLib.h for getting an accurate (us) timestamp on sensor readings. I'm able to run the TimeTeensy3 example just fine, but not seeing how I use TimeLib to get a us-level timestamp. I...
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    Brian, That sounds perfect. Will be glad to...

    Brian,
    That sounds perfect. Will be glad to volunteer to help test or debug it! Think this will be really useful for M8P and F9P RTK ops, as I can see where we may want to send UART RTCM3 data to...
  36. Thread: uNav INS

    by Don Kelly
    Replies
    709
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    152,825

    Hi Mike, Brain, Tim, Happy Holidays! Am...

    Hi Mike, Brain, Tim,
    Happy Holidays! Am following along with your testing Mike, looks interesting.

    I'm still refining my M8P RTK work using the SparkFun M8P-02 boards. The M8P-02 requires RTCM3...
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    Has anyone tried to use Brian's ublox library to...

    Has anyone tried to use Brian's ublox library to parse UBX-NAV-PVT via I2C? I'm using the I2C interface to the SparkFun RTK (M8P) board with its nice Qwiic I2C interface. The...
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    Mike, Is this what you're looking for? ...

    Mike,

    Is this what you're looking for?

    https://www.u-blox.com/sites/default/files/u-blox_ZED-F9P_InterfaceDescription_%28UBX-18010854%29.pdf
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    Hi Brian, I ordered two from CSG several weeks...

    Hi Brian,
    I ordered two from CSG several weeks ago, and about two weeks ago I got a message they were getting ready to ship. Not sure what it meant, so I guess I'm unsure if they've shipped or if...
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    Mike, Thx. For RTK operations, there's a "high...

    Mike,
    Thx. For RTK operations, there's a "high precision" UBX message (UBX-NAV-HPPOSECEF) that I want to parse, in addition to the info that's in the regular (UBX-NAV-PVT) message. So I'll likely...
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    Mike, I took a look at the examples. In the...

    Mike,
    I took a look at the examples. In the Ublox2 example, were you all experimenting with reading multiple ubx messages concurrently? I know Brian's library was originally intended to just read...
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    Thanks Mike, will try it out soon!! Happy...

    Thanks Mike, will try it out soon!! Happy holidays. Don
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    Chris O, Where might I get your latest updates...

    Chris O,
    Where might I get your latest updates on Brian's UBlox Library? I'm doing some RTK GPS testing using Brian's library, and I'm thinking some of your mods would be very helpful. I'm wanting...
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    I’ve got a set of these backpacks, and am...

    I’ve got a set of these backpacks, and am building a simple flight controller using the imu, pwm, and gps backpacks. If others are interested in following along, or helping, let me know. I already...
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    Looks interesting Brian, i’d be interested in...

    Looks interesting Brian, i’d be interested in them...
  46. Thread: uNav AHRS

    by Don Kelly
    Replies
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    162,174

    Hi Mike, Sorry I've been offline for the last...

    Hi Mike, Sorry I've been offline for the last couple months. Been consumed with delivering RTK units for a small fleet of drones. Your YAKF sounds interesting, I'll take a look!

    You and Brian were...
  47. Thread: uNav AHRS

    by Don Kelly
    Replies
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    162,174

    Very cool! As far as power, I am supplying the...

    Very cool! As far as power, I am supplying the BBB with external 5V. But I'm using a USB hub to then power both the M8T GPS board and WiFi dongle, so maybe those two are not getting enough from the...
  48. Thread: uNav AHRS

    by Don Kelly
    Replies
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    162,174

    Awesome. Will be glad to help with testing or...

    Awesome. Will be glad to help with testing or whatever!

    I've just got RTK running on the Beaglebone Black (BBB) with WiFi adapter (to pull in base station data). I'm having issues with WiFi...
  49. Thread: uNav INS

    by Don Kelly
    Replies
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    152,825

    Mike, I have one of Brian's Marmot boards,...

    Mike,

    I have one of Brian's Marmot boards, which plugs into a BeagleBone Black (arriving next week) running Linux Debian. So that (Beaglebone) might be an option. I'll be downloading RTKLIB this...
  50. Thread: uNav INS

    by Don Kelly
    Replies
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    152,825

    Mike, The Tallyman antenna is one of the...

    Mike,
    The Tallyman antenna is one of the antennas Drotek recommends.

    I just got in two new GPS units, the M8T from Drotek and a couple of cheap Stoton GN-801 (Chinese) boards. The GN-801s have...
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