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    The Nextion web site states that the I/O adaptor...

    The Nextion web site states that the I/O adaptor puts out 5v.
    The T4 only supports 3.3v devices. You may have "blown up" that input on the Teensy.
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    There are 4 channel and two channel versions look...

    There are 4 channel and two channel versions look for TSX0104 and TSX0102.
  3. Why not use a 40 pin IDC cable/socket/plug wired...

    Why not use a 40 pin IDC cable/socket/plug wired as shown below.
    23954
    This will result in every other wire being gnd. Also makes it easy making the cable using DIL IDC plugs and sockets.
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    Oops sorry, I see that Oak Tree LLC is selling...

    Oops sorry, I see that Oak Tree LLC is selling through Amazon, but check the prices I think you will see that it is buyer that is being shafted.
    Prices for a T3.2 and LC are:-
    ...
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    I said UK distributors. Amazon is not a PJRC...

    I said UK distributors. Amazon is not a PJRC distributor.
    UK distributors are:-

    Cool Components, HobbyTronics, Oak Tree LLC, PiHut and Pimoroni.

    They are listed here.
  6. Even by using an extended partition which can...

    Even by using an extended partition which can hold other partitions, I still believe that the total number of partitions on an MBR formatted drive is 4.
    A GPT partition can be formatted with up to...
  7. Windows only allows a maximum of 4 partitions per...

    Windows only allows a maximum of 4 partitions per drive.
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    It is possible but shipping charges are silly....

    It is possible but shipping charges are silly. Not Paul's fault but USPS. Better to buy from Paul's UK distributors.
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    Yes, 18 pins for 8 lanes instead of 20 pins, but...

    Yes, 18 pins for 8 lanes instead of 20 pins, but also cheaper.
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    ...or you could use something like a TSX080E,...

    ...or you could use something like a TSX080E, like this.
    Plenty of current to drive the opto-isolators and relatively cheap.
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    If speed is not paramount you could consider a...

    If speed is not paramount you could consider a PCF8574 I2C 8 bit expansion chip. The current per pin is 25ma with a total of 100ma for the package.
    There are also 16bit versions viz MCP23017. This...
  12. Your data on using Serial.begin on this page...

    Your data on using Serial.begin on this page https://www.pjrc.com/teensy/td_serial.html states that:-

    "Serial.begin()
    Initialize the Serial object. The baud rate is ignored and communication...
  13. A possible solution could be to enlarge...

    A possible solution could be to enlarge Serial.begin() to Serial.begin(baudRate, timeOut or delay) where Serial.begin(baudRate) /Serial.begin() defaults to a timeout/delay of 2.5 seconds, or whatever...
  14. Could it be a timing issue, Teensy 4.x going much...

    Could it be a timing issue, Teensy 4.x going much faster?
    In order to rule out, compile for a much lower speed similar to Teensy 3.x.
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    You could consider one of these...

    You could consider one of these. It provides 5v (and 3.3v) for the Teensy. It is powered from a usb psu. You could solder a wire to the battery connection and shut down and save data to sd card, or...
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    Hi Frank, If you would wish to share the cost of...

    Hi Frank,
    If you would wish to share the cost of the board I would welcome to join in.
  17. Here...

    Here is another display. Has HDMI and VGA inputs complete with i/o board.
  18. This display...

    This display might be useful when used with the above suggestion.
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    since you are looking for battery power this...

    since you are looking for battery power this might be of interest. Provides battery charging facilities as well. Very cheap - about $3 if I remember correctly.

    EDIT:
    You can get them here.
  20. Hi Duff, hope you and your family are well. I...

    Hi Duff, hope you and your family are well.
    I have posted a sample prog which demonstrates the problem under "suggestions and .....".
  21. Both sleep and deepSleep fail. Have not tried...

    Both sleep and deepSleep fail. Have not tried hibernate as it does a reset each time which is not useful.
  22. I have confirmed that the Snooze Library Kills...

    I have confirmed that the Snooze Library Kills the EEProm library.
    Have raised the issue in "Suggestions and Bug Reports"
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    SNOOZE Kills EEPROM ACCESS

    The Snooze Library seems to kill writing to EEPROM.
    Is there any code for recovering Writing To EEProm after waking from sleep?
    The code below demonstrates the problem.


    #include <EEPROM.h>...
  24. Hi, I don't claim to re any sort of expert but...

    Hi,

    I don't claim to re any sort of expert but I see a number of possible problems.

    You have setup snooze to use digital and alarm - you have not used any digital input to wake up, so take the...
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    He is trying to experiment with NOISE CANCELLING....

    He is trying to experiment with NOISE CANCELLING. Broadcasting an inverted signal in an attempt to cancel out ambient noise.
    Due to the inevitable processing delay, will not work by playing output...
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    Just thought I would add a different graph of...

    Just thought I would add a different graph of your (JotaEfe13) data.
    23188
  27. Thread: USB-C Adapter

    by BriComp
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    Are you going to be selling them? I would be...

    Are you going to be selling them? I would be interested.
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    It could be to bring it in line with Serial ports...

    It could be to bring it in line with Serial ports where Serial (aka Serial0) is USB Serial and Serial1,2,2...etc are real serial ports.
    Not making a definitive answer, just surmising.
    Happy...
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    That's the way Teensy 4.0 works in DeepSleep at...

    That's the way Teensy 4.0 works in DeepSleep at the moment. I don't know if it will change in the future.
  30. You could use MyUs.com to ship to the UK. They...

    You could use MyUs.com to ship to the UK. They will set up a US address for you. Have stuff sent there and they will forward it to the UK.
    I have just set up a MyUS.com account for myself. The basic...
  31. OK thanks. I had not seen any post announcing...

    OK thanks.
    I had not seen any post announcing that change.
  32. What's happened to the list of Distributors

    What's happened to the list of Distributors, I thought it had a sticky entry, but cannot find it any more.
  33. 18 from Pimoroni, admittedly with 2.99 p&p.

    18 from Pimoroni, admittedly with 2.99 p&p.
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    You can use the code below #if...

    You can use the code below

    #if defined(__IMXRT1062__)
    //Teensy 4.0 Code Here
    #elif defined(__MK66FX1M0__)
    //Teensy 3.6 Code Here
    #elif defined(__MK64FX512__)
    //Teensy 3.5 Code Here
    #elif...
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    Searching the web I found the following entry...

    Searching the web I found the following entry from 2014. Images provided at the arduino forum for this post look like your board.
    Perhaps this will give you a starting point.
  36. One of these...

    One of these might solve your battery problem. Battery powered by 18650 cell, outputs 5v and 3.3v. Use the 5v and power the teensy as well, or 3.3v to teensy and 5v to ADC.
    22664
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    Yes, I have just ordered a 4.1 with pins,...

    Yes, I have just ordered a 4.1 with pins, Ethernet Kit and PSRAM for 34.19 inc. 1st class postage.
    Pi Hut have just reduced the 4.1 to 26 from 26.50 (inc. headers for soldering).
    I expect to...
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    I am surprised you say that DigiKey is cheaper. I...

    I am surprised you say that DigiKey is cheaper. I just took a look and including header strips The PiHut are selling the 4.1 for 26.50. Digikey are charging 29.36 inc. headers and 27.06 without.
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    No I don't have a link but you could look at...

    No I don't have a link but you could look at Paul's posts. Just click on his name and select posts or whatever it is listed as.
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    That information came from Paul on this Forum....

    That information came from Paul on this Forum. The power needs to come up in a controlled manner. This is accomplished when powered by 5v but not 3.3v. Paul suggested having vbat supplied with...
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    I'll bear that in mind.

    I'll bear that in mind.
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    Here is the code, below. I will put a snapshot of...

    Here is the code, below. I will put a snapshot of the results for T4.
    The resolution of my capture device is only 41.66666ns. So when you see pin to pin times doubling from 42ns to 83ns it is down...
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    Hi Duff, have you any comment upon the Snooze...

    Hi Duff, have you any comment upon the Snooze wake up times I have found.
    See here.
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    No problem. I was hoping they would supply UK/EU...

    No problem. I was hoping they would supply UK/EU at a decent postage rate like OSH.
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    If you power teensy 4.0 from 3.3v only, then it...

    If you power teensy 4.0 from 3.3v only, then it is quite likely that it will NOT power up.
    Supplying VBAT with a backup battery may allow the Teensy to wake up when 3.3v used to power it.
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    They are currently set up for US customers only....

    They are currently set up for US customers only. Bottom of his first post.
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    Does that mean there will be affordable postage...

    Does that mean there will be affordable postage to the UK as well? OSH only charge a $1 and put them in an envelope/jiffy bag.
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    Having looked through the code for the...

    Having looked through the code for the ElectronicsHub tutorial there in no reason why you could not change the ESP8255 for a HardWired Teensy ethernet system. Sending the email from Teensy would be...
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    I think using two computer boards is a bit over...

    I think using two computer boards is a bit over the top.
    Since the ESP8266 has the WiFi capability and the ability to read a temperature sensor, there is, unfortunately, no need for the Teensy.
    ...
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    Snooze Wake-up Recovery Times - Edited Added Teensy4 Sleep Data

    I have been looking at the time it takes for Snooze to wake-up on various Teensy. (What's the plural of Teensy?).

    All this started when I found that I could NOT use a Teensy4 in a project because...
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