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  1. Thread: T3.x Flexiboard(?)

    by ian
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    92
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    23,394

    As a black box you might like esp-link?...

    As a black box you might like esp-link? https://github.com/jeelabs/esp-link

    Ian
  2. Thread: T3.x Flexiboard(?)

    by ian
    Replies
    92
    Views
    23,394

    Frank, I think Tim is just trying to confuse you...

    Frank, I think Tim is just trying to confuse you ;)
    The ESP8266 is (almost!) as easy to work with as Teensy...
    I really can't imagine why anyone would use AT codes :(
    Buy a NODEMCU board & play...
  3. Thread: T3.x Flexiboard(?)

    by ian
    Replies
    92
    Views
    23,394

    Sorry about the broken link - should be ok now......

    Sorry about the broken link - should be ok now...
    http://myiot.co.uk/ENGD2003/web/8266_protoboard.html
    @Frank - yes it has I2C. I don't think it supports slave mode yet.
    The I2C pins are...
  4. Thread: T3.x Flexiboard(?)

    by ian
    Replies
    92
    Views
    23,394

    I started out using the ESP8266 with a Teensy 3.1...

    I started out using the ESP8266 with a Teensy 3.1 - it's actually posted on here somewhere :)
    I built a 'breadboard' for students to use:
    http://myiot.co.uk/xENGD2003/web/8266_protoboard.html

    Ian
  5. Thread: T3.x Flexiboard(?)

    by ian
    Replies
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    Views
    23,394

    Hi Frank, I've used the ESP8266 quite a lot....

    Hi Frank,
    I've used the ESP8266 quite a lot. Teensy too in the past. Not enough hours in the day for everything!
    The Arduino ESP is very good (but not perfect!) There are detailed installation...
  6. Replies
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    I'm not familiar with the Huzzah but it looks...

    I'm not familiar with the Huzzah but it looks like another 'NodeMCU' design. Yes, that's the kind of board I'm talking about - they're super cheap on Ebay - usually from China. They come in at least...
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    @ Stevech If you use a 'NodeMCU' board it works...

    @ Stevech
    If you use a 'NodeMCU' board it works exactly like an Arduino/Teensy. No buttons to press at all. I use one of these for testing code.
    You mentioned that the ESP8266 is a MIPS device? I...
  8. Replies
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    The sketch Stevech posted works fine - I just...

    The sketch Stevech posted works fine - I just tried it. If you're reading the serial out from the ESP8266 to a Teensy serial port you'll probably get buffer over run problems. Try increasing the...
  9. Thread: WizFi250?

    by ian
    Replies
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    20,812

    I can confirm that this works, as long as you're...

    I can confirm that this works, as long as you're not using a 'recent' Apple device to connect. It seems they reserve the '.local' suffix for bonjour devices now. This confused me as it wouldn't work...
  10. Thread: WizFi250?

    by ian
    Replies
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    20,812

    Hi Sumotoy The link I gave was for IDE 1.6.4....

    Hi Sumotoy

    The link I gave was for IDE 1.6.4. I use it without any mods.
  11. Thread: WizFi250?

    by ian
    Replies
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    20,812

    If you want to use the Arduino IDE this is...

    If you want to use the Arduino IDE this is helpful: https://learn.adafruit.com/add-boards-arduino-v164
    Be VERY careful about powering these things - this issue comes up very often & I was a...
  12. Thread: WizFi250?

    by ian
    Replies
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    20,812

    I'd be surprised if a homebrew board responded to...

    I'd be surprised if a homebrew board responded to AT commands.
    Surely the AT stuff is on the flash memory?
    I use code like Frank B's as a 'pass through' when I use Teensy with ESP8266
  13. Thread: WizFi250?

    by ian
    Replies
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    20,812

    @Onehorse - we have very different objectives....

    @Onehorse - we have very different objectives. Mine is to educate aspiring engineers & show them different ways of doing things. I agree with you, the Xtensa CPU is no match for Teensy in most areas!...
  14. Thread: WizFi250?

    by ian
    Replies
    95
    Views
    20,812

    Sorry about the link, it was meant to be a jpeg -...

    Sorry about the link, it was meant to be a jpeg - the board wouldn't accept my post without reloading... Try again...4074
    Sounds good - the ESP8266 CAN use a lot of current but it doesn't always....
  15. Thread: WizFi250?

    by ian
    Replies
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    20,812

    Onehorse, I think they're all 4Mbit. Olimex do...

    Onehorse,

    I think they're all 4Mbit. Olimex do a board with more memory: https://www.olimex.com/Products/IoT/MOD-WIFI-ESP8266-DEV/open-source-hardware
    I don't have one but it looks nice.
    If...
  16. Thread: WizFi250?

    by ian
    Replies
    95
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    20,812

    Check out my lecture notes for next Thursday:...

    Check out my lecture notes for next Thursday: http://www.cse.dmu.ac.uk/~sexton/node/

    Ian
  17. Thread: WizFi250?

    by ian
    Replies
    95
    Views
    20,812

    Hiya Onehorse, I didn't mean to question your...

    Hiya Onehorse,
    I didn't mean to question your motive. Maybe I should sell my adapter too?

    My adapter IS appallingly small! It's SO small that it's invisible to the naked eye! ;) That's an antenna...
  18. Thread: WizFi250?

    by ian
    Replies
    95
    Views
    20,812

    Hi Jim, there are no 'drivers' as such for the...

    Hi Jim, there are no 'drivers' as such for the ESP8266, it uses a serial interface. I connect it to Serial1 in the above photo. I've tried to make it as plug & play as possible because it's for...
  19. Thread: WizFi250?

    by ian
    Replies
    95
    Views
    20,812

    I posted here a little while ago re ESP8266. The...

    I posted here a little while ago re ESP8266. The photo shows a ESP-01 attached underneath a Teensy 3.1 with the antenna protruding, I made a small adapter board (just a 3v3 regulator and a couple of...
  20. Thread: Esp8266

    by ian
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    976

    Esp8266

    I've posted here previously re my dabblings with ESP8266.
    I have Yet Another Breakout Board...
    http://www.cse.dmu.ac.uk/~sexton/ENGD2003/8266_protoboard.html
    Possibly most interesting (for me at...
  21. Thread: Arduino.org

    by ian
    Replies
    298
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    72,008

    @Duff - my thought too :)

    @Duff - my thought too :)
  22. Thread: Arduino.org

    by ian
    Replies
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    72,008

    Hi Bobc, You may be right that there is no...

    Hi Bobc,
    You may be right that there is no general rule, and in general copyright does NOT remain with the author. Have you ever published in IEEE for example? I have & THEY own the rights, not me....
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    Someteen - It's your lucky day! Your post jogged...

    Someteen - It's your lucky day! Your post jogged my memory...
    I did this when I was filling in labs for someone. I knew the students & thought they might be happier with an Arduino perspective so I...
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    Someteen I found it - I can't promise that this...

    Someteen
    I found it - I can't promise that this works...



    /*
    Phase correct PWM using Teensy 3.x flex timer
    */

    const int ledPin = 13;
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    Hi Someteen I had exactly the same issue last...

    Hi Someteen
    I had exactly the same issue last year. AFAICR this is trivially simple on a Arduino, not so with a Teensy.
    It's often called 'phase correct' pwm
    I was building a class D amplifier...
  26. Thread: Arduino.org

    by ian
    Replies
    298
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    72,008

    In UK universities IP is generally owned by the...

    In UK universities IP is generally owned by the university. In my own experience I've never seen an issue at undergraduate level. I had a PhD student who refused to disclose his 'best' work in his...
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    Cheers Pete The plot thickens! It looks like...

    Cheers Pete

    The plot thickens!
    It looks like a bug & smells like a bug...

    Ian
  28. Replies
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    Let's keep it simple. Arduino reference page for...

    Let's keep it simple. Arduino reference page for String() -
    http://arduino.cc/en/Reference/StringConstructor
    Here is a better(?) illustration:


    byte data1=55; //all the same
    int8_t data2=55;...
  29. Replies
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    Teensy 2.0 String() bug?

    I've just ported a program for an Arduino to Teensy 2 & it failed. I've narrowed the issue to a problem with String() which doesn't seem to like variables declared as byte.
    This seems to work just...
  30. Replies
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    PS The Diptrace Teensy footprint came from...

    PS The Diptrace Teensy footprint came from someone on this forum. I feel guilty not acknowledging this but I don't remember who it was :(
  31. Replies
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    I've played with the NodeMCU firmware but never...

    I've played with the NodeMCU firmware but never really tested it. I prefer to stick with the AT stuff as I'm a 'teacher' & my students are getting to grips with C. Introducing LUA might confuse them....
  32. Replies
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    I'll give it a try! Responses like, 'not changed'...

    I'll give it a try! Responses like, 'not changed' and 'no, I like it' were not very helpful!
    I've had a lot of frustration with the early firmware. I set up a very simple server, quite like Wozzy's...
  33. Replies
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    Hi Wozzy, I suspect the Russian(?) firmware...

    Hi Wozzy, I suspect the Russian(?) firmware you're using isn't an 'official' release. AFAIK the most recent 'official' firmware is to be found on the Espressif website:...
  34. Thread: 2 problems

    by ian
    Replies
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    5,472

    Fascinating, but I'm using serial USB...

    Fascinating, but I'm using serial USB...
  35. Thread: 2 problems

    by ian
    Replies
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    5,472

    Paul, sorry I've taken so long with this. TOO...

    Paul, sorry I've taken so long with this. TOO busy just now:(
    I'm using the Arduino terminal. I don't think I'm doing anything odd...
    This is what your code generates

    This is teensy...
  36. If my memory serves me correctly I had exactly...

    If my memory serves me correctly I had exactly the same problem when following the example on Paul's website https://www.pjrc.com/teensy/td_libs_SSD1306.html
    I was using the I2C 128x64 display too,...
  37. Thread: 2 problems

    by ian
    Replies
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    5,472

    Eh? No it isn't printing 'connected' that's my...

    Eh? No it isn't printing 'connected' that's my point
    I've had a scout around and can't see any modems lurking under the desk ;) Indeed there are NO other USB devices apart from my printer.
    I know...
  38. Thread: 2 problems

    by ian
    Replies
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    5,472

    Try this code: char a; void setup() { ...

    Try this code:


    char a;

    void setup()
    {
    Serial.begin(9600);
    }
    void loop()
  39. Thread: 2 problems

    by ian
    Replies
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    5,472

    Yep, done that, even checked port in device...

    Yep, done that, even checked port in device manager. No joy.
  40. Thread: 2 problems

    by ian
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    5,472

    Groan, Problem 1 solved My RTC battery was...

    Groan,

    Problem 1 solved

    My RTC battery was connected between Program & VBat thanks to a PCB fault :(

    edit - as an afterthought I went back & checked my other 2 Teensys which now work...
  41. Thread: 2 problems

    by ian
    Replies
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    5,472

    Clarification

    Hi Paul,

    I seem to have confused the issue by intoducing a second problem. To clarify:

    Problem 1

    The program DOES NOT run if Teensy is powered from another source. It only runs immediately...
  42. Thread: 2 problems

    by ian
    Replies
    20
    Views
    5,472

    2 problems

    Problem 1

    I'm using Teensy 1.20, Arduino 1.0.6, on a W7 64bit machine with Audio library downloaded yesterday from PJRC

    Yesterday I was playing with my Teensy3.1 & audio board. I compiled &...
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    Thanks CheapB :) I grew tired of the thing...

    Thanks CheapB :)
    I grew tired of the thing locking up & not responding to AT+RST. Hard reset seems a bit brutal but it seems to work...
    I'll leave it running overnight.

    Ian
  44. Replies
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    I've played with one of these - very frustrating!...

    I've played with one of these - very frustrating! I'm looking to use them in student projects. I've done a little write up: http://www.cse.dmu.ac.uk/~sexton/ESP8266/
    It's very 'work in progress' but...
  45. Replies
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    Hi Dan, Did you sort this? I had almost exactly...

    Hi Dan,
    Did you sort this? I had almost exactly the same problem using the Adafruit demo code. Inserting a 5 second delay at the start of setup() fixed it - I don't understand why...
    Try...
  46. I'll do my best not to disappoint Rob ;) I...

    I'll do my best not to disappoint Rob ;)

    I think everything is working just as it should.

    It's useful to understand how R/C servos work: typically R/C servos are driven by pulses which vary in...
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    I don't have any experience with OctoWS2811 but...

    I don't have any experience with OctoWS2811 but I've done something vaguely similar (although simpler!) to your IR sensing problem so I thought I might offer my thoughts on how I might approach this....
  48. Replies
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    I believe all mifare cards are available with 7...

    I believe all mifare cards are available with 7 byte UID now(?) I suspect DESFire might be a bit special (DES encryption)
    Google shows me plenty of UK suppliers of 'mifare classic 7 byte cards'
    The...
  49. Replies
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    We could use that :) We use Arduinos & Teensy. A...

    We could use that :) We use Arduinos & Teensy. A power jack & regulator would be nice. An extra set of pins (like Seeeduino) would be nice so we can make shields on strip board.
  50. Replies
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    Paul, It would probably be helpful to have...

    Paul,

    It would probably be helpful to have some cards which you know for certain use a 7 byte ID, particularly as this is what HGPAust is struggling with. It's quite likely the cards bundled with...
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