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  1. Replies
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    Thank you Paul. I found the problem. It turns...

    Thank you Paul. I found the problem.

    It turns out it is related (most likely) to driver behavior with Windows 7. I first did a loop test on the analyzer, and it did not work so I reset the...
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    266642666526666

    266642666526666
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    Thank you for your help. I will send you a...

    Thank you for your help. I will send you a picture (I am not using the custom board).

    When you have a chance, please send me your analyzer .ini files.

    Thanks again and good night.
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    I am measuring 2.35V on both.

    I am measuring 2.35V on both.
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    When I swapped the CANL and CANH lines and...

    When I swapped the CANL and CANH lines and restarted, the green light stopped flashing. When I put them back as before, the green light flashes.

    I am sure CANL and CANH are wired correctly ....
    ...
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    I am not sure what I am doing incorrectly. I...

    I am not sure what I am doing incorrectly.

    I connected the circuit as you showed in message #23. I am using the waveshare module because I know it works.

    The CANUSB module's green light...
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    Thank you Paul. Here are the exact steps I...

    Thank you Paul.

    Here are the exact steps I did:

    1) Select Com Port.
    2) Select "Standard frame" for Type
    3) Select CAN bps 500kbps
    4) Opened Com Port
    5) Clicked on Set and Start
    6) Checked...
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    How to use analyser?

    Hello Paul:

    My CanUSB arrived and I hooked it up as you showed and downloaded the software.

    Can you please show me the testing steps. I attached what I tried but there is no response.
    ...
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    Just ordered a unit. I noticed you are using...

    Just ordered a unit.

    I noticed you are using V8 of the software. Where did you get that version from? The latest version I could find was 7.2

    http://github.com/SeeedDocument/USB-CAN-Analyzer...
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    Thank you very much Paul. I will follow your...

    Thank you very much Paul.

    I will follow your recommendation and think it may be a good idea for me to invest in a CAN analyzer. Can you share with me the one you are using?

    Is it this one:
    ...
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    Hello @PualS: Because the Waveshare module...

    Hello @PualS:

    Because the Waveshare module does not fit my board, I bought 3 more of the other CAN module. All 3 boards did not work!

    I would appreciate your help in explaining this...
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    Unfortunately, very true.

    Unfortunately, very true.
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    Thanks, I will definitely check mine when I get...

    Thanks, I will definitely check mine when I get back to the office.
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    What threw me off was that two of those boards...

    What threw me off was that two of those boards have been working well for months!

    On closer inspection, those boards are very simple, containing a single IC and a few resistors. I am almost sure...
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    Thanks @PaulS. I isolated the reason to a...

    Thanks @PaulS. I isolated the reason to a defective CAN transceiver board. Because it is a smaller board, I was using the board below which I realized from reading its reviews that a lot of those...
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    Flexcan_T4 : Can pins be reconfigured?

    I am using the Flexcan_T4 library with a Teensy 4.1. The Teensy is in a custom board that is hard-wired for can1 and can3. I could not use can2 because it is used in my application as a Serial1...
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    Thanks @PaulS. I checked all. The only...

    Thanks @PaulS. I checked all.

    The only thing I did not check is the waveforms because even though I have a scope, knowledge of electronics is limited so I would not know what to look for!
    ...
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    Yes, the Teensy is placed on a custom carrier...

    Yes, the Teensy is placed on a custom carrier board which also has the CAN transceiver pictured above. The CAN sensor connects to that carrier board.

    I have already tried swapping Teensys and...
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    For the sensor to work in my application, it...

    For the sensor to work in my application, it requires a minimum bitrate of 500.

    Here are the set up statements and the full code is also attached.


    can1.begin();
    can1.setClock(CLK_60MHz);...
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    I am using 500 When I first tried this a few...

    I am using 500

    When I first tried this a few months ago, it worked up to 250 but did not work at faster speeds. I wrote to the forum and you helped me fix it at the time by telling me to add the...
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    Thank you @PaulS but I have already tried that...

    Thank you @PaulS but I have already tried that but it did not work.

    Also, two of the boards are working and that is why I am wondering if this problem that only affects some boards is related to a...
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    Thank you @tonton. I attached the wiring...

    Thank you @tonton. I attached the wiring diagram.

    I believe that everything is wired correctly because two of the boards work. BTW, I have tried with, and without the 60 Ohm resistor but it...
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    Teensy 4.1: How to check CAN is defective

    I have about 6 Teens 4.1, each installed in its custom board. I am using the FlexCanT4 library along with a CAN interface board.

    I noticed that on 4 Teensy boards, the software is not reporting a...
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    Thank you Paul. I used Option 3 above. One...

    Thank you Paul.

    I used Option 3 above. One line in my code did not compile:


    root.openRoot(volume);

    What replaced the openRoot function or is it better to replace the SD with the SDFat...
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    Thank you @kd5rxt-mark. I upgraded to...

    Thank you @kd5rxt-mark.

    I upgraded to Teensyduino 1.55 (latest). But now I am getting an unexplained compile error due to the SD library (most likely). When I connected out the SD code, the...
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    Compile Error with Teensyduino 1.55

    I have a program which ran fine with Teensyduino 1.53. I was getting occasional EEPROM corruption so I upgraded to Teensyduino 1.55.

    Now the same program does not compile and gives the error...
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    Teensy 4.1: EEPROM Corruption

    I have a Teensy 4.1 powered by a POE inverter.

    My Teensy restarts periodically using the wdt watchdog library.

    After starting, I read 35 variables from EEPROM. Each variable is 25 bytes so...
  28. For stability, would rebooting the Teensy every...

    For stability, would rebooting the Teensy every number of hours using the watchdog library help?

    In normal usage, I have not had a problem with the NativeEthernet library. I found out that my...
  29. The challenge is that it does not happen every...

    The challenge is that it does not happen every time so it is hard to consistently reproduce.

    That said, the webserver never had issues with the NativeEthernet library which reproduced the web page...
  30. Thank you @shawn. Here is the webserver code...

    Thank you @shawn.

    Here is the webserver code (which you substantially fixed so it runs with the QNEthernet library). The webserver runs but gives these intermittent problems as I described...
  31. Thank you @shawn. I am also puzzled because the...

    Thank you @shawn. I am also puzzled because the same exact code works with no delay on the native Ethernet library.

    Since my last message, I found out that the reason I was getting an IP: 0.0.0.0...
  32. Good Afternoon @shawn I used the code below...

    Good Afternoon @shawn

    I used the code below both for QNEThernet and NativeEthernet. The times in ms are as below:

    ------------------------------------------
    QNEthernet...
  33. @shawn. Thanks will try it. To answer the...

    @shawn. Thanks will try it.

    To answer the delay question, with QNEthernet, it took about 850 ms to turn all 4 relays off.
  34. I made the changes below but the speed is still...

    I made the changes below but the speed is still the same:


    void EthernetClient::stop() {
    if (conn_ == nullptr) {
    return;
    }

    const auto &state = conn_->state;
    if (state ==...
  35. Thank you @shawn and @vjmuzik. I will remove...

    Thank you @shawn and @vjmuzik.

    I will remove the loop tomorrow and report.

    Also, to answer your question, with QNEthernet, I never got an IP of 0.0.0.0 but then this only happened a few times...
  36. Thank you very much Shawn. I have learnt a lot...

    Thank you very much Shawn. I have learnt a lot from you.

    If I may add a quick note:

    The relay code above takes the same time as before (it is not faster). With the NativeEthernet library,...
  37. Thank you very much Shawn. You have gone beyond...

    Thank you very much Shawn. You have gone beyond the call and I really appreciate it. I used your code and it works.

    IMHO, this is the single most important library needed to exploit the benefits...
  38. Thank you Shawn. I have tried using writeFully...

    Thank you Shawn.

    I have tried using writeFully per your earlier recommendations but I must have the format incorrectly.

    Can you please show me how to use writeFully for the statements below:
    ...
  39. Shawn: I have done some more checking and now...

    Shawn:

    I have done some more checking and now I am sure there is something wrong in the QNEthernet's library handling of:



    webClient.println

    When I took out sections from the code I...
  40. Thank you Shawn. While the issue below may not...

    Thank you Shawn.

    While the issue below may not related, it has to do with the Ethernet connection. It also uses the println command.

    I have a networked relay that has 4 relays. With the...
  41. Thank you Shawn. The program is too long but I...

    Thank you Shawn. The program is too long but I have attached the webserver module. I hope it helps.

    I have also attached how the page looks like when it is properly rendered vs. now.
  42. QNEthernet Library - EthernetClient misbehaving

    I was using the NativeEthernet library and had some intermittent issues with it and the community recommended I use the QNEthernet library instead.

    I changed my code to use the QNEthernet library...
  43. Thank you vjmuzik. This problem has been really...

    Thank you vjmuzik. This problem has been really demoralizing to me.

    DHCP should not be involved because I am using a Static IP. So I am really puzzeled as to why it is getting a 0.0.0.0 IP.

    I...
  44. Thank you TeensyWolf. Please tell me the...

    Thank you TeensyWolf. Please tell me the differences between them?
  45. Serious Issue: IP = 0.0.0.0 Teensy 4.1 Native Ethernet Library

    I have a Teensy 4.1 sketch which uses the NativeEternet library. I am using the latest versions of TeensyDuino and NativeEthernet.

    My program runs without ANY problems for days. The program uses...
  46. Good morning Paul, Thank you very much for...

    Good morning Paul,

    Thank you very much for your time.

    In making a smaller version of my program to send to you, I discovered a mistake in setting the array which prevented entries > 29 from...
  47. Teensy 4.1 EEPROM Limit: Cannot write more than 29 values

    I would appreciate the community's help with the EEPROM issue I am having.

    I am storing in EEPROM 33 String values. Each value is a String that is a maximum of 25 bytes. Given that the EEPROM...
  48. Teensy 4.1: Taking a snapshot from an IP camera

    Is it possible for a Teensy 4.1 to take Snapshot image from an IP camera?

    In my application, I am not interested in streaming live video, rather I only want to take single snapshots. The...
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    True, there can be large variations due to...

    True, there can be large variations due to day/night and thunderstorms.

    The application is in an urban environment. Summer thunderstorms do lead to a rapid reduction in temperature of about 15C...
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    Thank you MarkT. Yes, you are correct that...

    Thank you MarkT.

    Yes, you are correct that they come with an adhesive. Reviews though indicate that cheap adhesives tend to lose their grip over time. Also, my Teensy is not flat, it is placed...
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