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    That may well be the understatement of the decade...

    That may well be the understatement of the decade :cool:

    Frank
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    I'm making some baby steps toward integrating an...

    I'm making some baby steps toward integrating an ESP32-based WiFi module with a Teensy setup for OTA programming. Using this tutorial, I have been able to pass text back and forth between two PuTTY...
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    What about using something like an HC-05 BT...

    What about using something like an HC-05 BT module for the 'RF bit'?
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    That sounds great, but I'm not sure how that...

    That sounds great, but I'm not sure how that would work in detail. Is it sufficient to simply connect to the D+/D- pins on the USB connector so the Teensy thinks it is connected to a USB port, or is...
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    jonr, Thanks for the reply. Its very...

    jonr,

    Thanks for the reply. Its very frustrating to have such a nice line of MCU's with the Teensy 3.x & now the 4.x, but still have no good way of updating firmware OTA. I have seen some posts...
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    Jonr, Can you expand on this project a bit? I...

    Jonr,

    Can you expand on this project a bit? I looked at your flasher.cpp and it seems pretty reasonable, but a little more detail on the RF link portion of this would be nice, if you have the...
  7. Thread: OTA Flasher4

    by paynterf
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    Can you describe your project and how you got it...

    Can you describe your project and how you got it to work?I tried searching for 'Flasher4' and 'OTA', but got no relevant hits.

    TIA,

    Frank
  8. Voltage sustaining capacitor on Teensy 3.5 3.3V output?

    I'm using a T3.5 to manage an array of seven ST Micro VL53L0X ToF distance sensors, 3 on Wire1 and 4 on Wire2. All seven are powered from the 3.3V output pin. The T3.5 and the sensors are mounted on...
  9. After getting my clock program finished (to the...

    After getting my clock program finished (to the degree that any of my projects are 'finished'), I went back to investigate the display 'craziness' issue, but this time with the ILI9341_t3n library. ...
  10. I posted a more-or-less complete description of...

    I posted a more-or-less complete description of my digital clock project on my blog here
  11. oohhh, an old 2x20 vacuum flourescent dot-matrix...

    oohhh, an old 2x20 vacuum flourescent dot-matrix display. I would have killed for one of these as a design engineer in the 70's ;-)

    Yes, I'm using the t3n version of the library. Don't know what...
  12. Here's a shot showing my touch-screen endeavor....

    Here's a shot showing my touch-screen endeavor. Seems to be working consistently now, so earlier issues were probably operator error.

    23958
  13. I got a cracked one also, and one of the two I...

    I got a cracked one also, and one of the two I got from PJRC was DOA, so I suspect that what we are getting when we buy these cheap displays is the rejects from the quality control process. I...
  14. May have been a false alarm. Went back very...

    May have been a false alarm. Went back very carefully through wiring setup, and reseated everything. Seems to be working much better now. I've had it running now for 2 days straight with no...
  15. I'm having the same problem with a T3.2...

    I'm having the same problem with a T3.2 implementation, except it started after some period of working correctly. Now I'm getting continuous touch detections even without anything touching the...
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    MarkT, I understand the physics - I just can't...

    MarkT,

    I understand the physics - I just can't find a way to physically access the X+/X- & Y+/Y- wires. Here's a photo of the back of the display, showing the flex cable routing. There doesn't...
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    MarkT, That is a very good idea, but I don't...

    MarkT,

    That is a very good idea, but I don't have a clue where to find the X-/X+ and Y-/Y+ terminals. There's nothing labeled like that anywhere on the display I have from PJRC (or eBay), and...
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    Interesting - I had seen some documentation in...

    Interesting - I had seen some documentation in some of the Adafruit example code about measuring the X & Y resistance values, but since there seemed no way to do that with the PJRC displays using the...
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    Mark, Do you happen to remember what delay you...

    Mark,

    Do you happen to remember what delay you found to be most effective? Where you just delaying, or averaging multiple readings?

    To address your thoughts about the pressure variation being...
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    I made some further tests by drawing a continuous...

    I made some further tests by drawing a continuous rectangle starting at the upper left-hand corner and proceeding clockwise around the screen, ending up at upper left again. I did this twice - once...
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    rcarr, Thanks for the head-up! I noticed the...

    rcarr,

    Thanks for the head-up! I noticed the off-screen coordinates but didn't think much of them at the time. I figured I would handle that later, when I actually had something working ;-)
    ...
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    I modified my sketch to just record raw touch...

    I modified my sketch to just record raw touch screen data every 10mSec during touch periods, and then touched each corner in turn for about 1 second, trying to apply approximately the same pressure...
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    ILI9341 Touch Screen debounce?

    Hi,

    I have been working with a Teensy 3.2 connected to a ILI9341 TFT/Touch display from Paul's store, and I am having a problem debouncing the touch screen. I have a very simple sketch that takes...
  24. SteveW, I took a look at the double-buffering...

    SteveW,

    I took a look at the double-buffering example, but it says it only works with the t4, as the t3x series doesn't have enough memory for double-buffering. Are you using a t4?
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    Paul, My apologies to all for hijacking this...

    Paul,

    My apologies to all for hijacking this thread, but I don't know what else to do. I ordered and received 2ea ILI9341 displays from your store 2 weeks ago, and one of them appears to be DOA. ...
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    Getting product support?

    Hi,

    I got a couple of ILI9341 displays from Paul a few weeks ago, and it appears that one of them may be DOA. I have emailed both Paul & Robin (per the 'contact us' listing) but haven't gotten...
  27. So, I let the clock run overnight with no hourly...

    So, I let the clock run overnight with no hourly refresh, with the non-proportional font, and it is still OK this morning. So, there is definitely an issue with the proportional font (memory leak?)
  28. The problem seems to be related to the use of the...

    The problem seems to be related to the use of the Arial proportional font. I changed to non-proportional text and it seems to be working well. After about 6 hours I see no artifacts at all, without...
  29. So I tried to fix this problem by refreshing the...

    So I tried to fix this problem by refreshing the screen completely at the top of each hour. Imagine my surprise when I woke up this morning to this display

    23720

    Here is the entire clock...
  30. Kurt, On another issue; I note that the...

    Kurt,

    On another issue; I note that the mapping function


    uint16_t px = map(p.y, TS_MAXY, TS_MINY, 0, tft.width());
    p.y = map(p.x, TS_MINX, TS_MAXX, 0, tft.height());
    p.x = px;
  31. Kurt, What does bool...

    Kurt,

    What does


    bool XPT2046_Touchscreen::bufferEmpty()
    {
    return ((millis() - msraw) < MSEC_THRESHOLD);
    }
  32. Kurt, Yep - resetting the pin assignments did...

    Kurt,

    Yep - resetting the pin assignments did the trick! Now I'm getting touch operation, but the the dots drawn in response to stylus input looks to be mirrored in both X & Y. IOW, when I touch...
  33. ILI9341 Display craziness after long run between screen refreshes

    I have a simple clock program running on a new ILI9341 from the PJRC store (code included below), and it seems to be working fine. However, after several hours of run time, it starts to show some...
  34. Kurt, You are correct, the PJRC display...

    Kurt,

    You are correct, the PJRC display doesn't expose those pins, which added to my confusion. Also, the documentation talks about measuring the resistance of the X & Y plates, but those don't...
  35. Kurt, Thanks for the prompt and informative...

    Kurt,

    Thanks for the prompt and informative reply. Hmm, I am using the libraries recommended on the PJRC store page (or at least I think I am - sometimes its hard to tell), and the example files...
  36. I modified the onoffbutton_breakout sketch to...

    I modified the onoffbutton_breakout sketch to report the pressure at each coordinate. Most coordinates showed 0 pressure, but these didn't:



    checking (173,785), press = 196
    1
    checking...
  37. Hmm, same thing happens with a second brand-new...

    Hmm, same thing happens with a second brand-new display. Red/Green button presses detected randomly with no user input. Sure sounds like I'm doing something wrong, but don't know what it is
  38. I also tried the onoffbutton_breakout.ino sketch....

    I also tried the onoffbutton_breakout.ino sketch. It works, but continually shifts from 'red button hit' to 'green button hit' without any input from me.
  39. ILI9341 GraphicsTest works, Touch paint demo not so much

    Hi,

    Just got a couple of the very nice ILI9341 displays to play with. I got the 'graphicstest' example working very nicely, but I can't get the 'touchpaint' one to work. The wiring for the...
  40. Kurt, Ironically, I used to be a sysadmin for...

    Kurt,

    Ironically, I used to be a sysadmin for a 50+ PC research lab, and most of the PC's were dual-boot Win x and Linux. Back in the day, as a sysadmin for a 50+ Linux box research lab, I could...
  41. Kurt, Great that you put up a PR for this! ...

    Kurt,

    Great that you put up a PR for this! I'm having an odd problem downloading your repo (https://github.com/KurtE/vl53l0x-arduino/tree/multi_wire), as the 'Code' button on your Github account...
  42. Kurt, Glad you are playing with the VLXXX...

    Kurt,

    Glad you are playing with the VLXXX sensors. I agree the Adafruit library is very limited, but it does allow for different Wire objects - a necessity for me. Also, my application is pretty...
  43. Well, it is officially time to eat crow.* After...

    Well, it is officially time to eat crow.* After all the whooping and hollering I've done, it turns out the entire problem was a hidden ground wire*break in I2C daisy-chain cable attached to the...
  44. Kurt, I really appreciate the time and effort...

    Kurt,

    I really appreciate the time and effort you have put into this, but I'm not sure where you are going with the delay questions. Do you have a theory that explains why sensors 1 & 2 operate...
  45. Yes, the delays are in there and they have no...

    Yes, the delays are in there and they have no effect. Here's the latest code. However, I have to say that I have been running a 3-sensor array successfully for months without any delay between the...
  46. Adding delays does not appear to change the...

    Adding delays does not appear to change the symptoms. As you might have surmised looking at the commented-out lines, have looked at the error codes before, but they aren't very helpful. Here is an...
  47. I also inserted a 1-Ohm resistor in the +V line...

    I also inserted a 1-Ohm resistor in the +V line to all six sensors to look at the dynamic current flow. It appears the peak current is about 20-30 mA, and this occurs for 10-20 mSec ever 100 mSec or...
  48. I added a 100 mSec delay after each 'begin()'...

    I added a 100 mSec delay after each 'begin()' call, but it didn't seem to affect anything; still getting correct readings from sensors 3-6, invalid results from 1 & 2.

    Good point regarding...
  49. Thanks for all the feedback! Unless there is...

    Thanks for all the feedback!

    Unless there is some overriding reason to do so, I prefer to document everything on my blog site, as this is my 'engineering notebook' for all my projects.

    I have...
  50. Paul, Thanks for taking the time to look at...

    Paul,

    Thanks for taking the time to look at this. I'll definitely check out all of these possibilities. I think I can answer the power consumption question directly, as the Pololu spec sheet...
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