DSB1820 Onewire sensor on SiPy



  • I want to use the DSB1820 Onewire temperature sensor to read the temp and send the data to Sigfox.
    How do I import the ds18x20 module? I am getting the error:

    Traceback (most recent call last):
    File "<stdin>", line 2, in <module>
    ImportError: no module named 'ds18x20'
    

    I have pasted the ds18x20.py into the folder my other py files and project is in. Is that not where it goes?
    Is it the right library for DSB1820? I got it from here.

    I've setup my Sipy as:
    VCC = 3.3V pin
    Ground = GND
    Data = G17



  • @sk
    Is this what you downloaded from board or what you have on the computer?
    Previously (for me still - however less than before) there are some corruption of files stored on the board.

    try something like this

    f = open('onewire.py', 'r+')
    d = f.readall()
    print(d)
    

    do you see some corruption in content?

    Try also downloading file throught ftp - is this file same as your on the computer?



  • @livius

    0_1487543077630_onewire.py
    this doesnt have enableXe_irq, I don't think its the files thats faulty. Something is wrong with my code or the order I'm doing things, I'm pretty sure, I just don't know what?



  • use official onewire driver
    https://github.com/pycom/pycom-libraries/tree/master/examples/onewire
    it work for me on Wipy2.0

    but first check if your file is not corrupted
    try compare it in text editor e.g Notepad++, Total Comander, WinMerge ...
    i mean - read file e.g. throught ftp and compare with file you thing that should be stored
    because i see in your error message corrupted name "enabXe_irq" which not exists in onewire driver



  • I've also followed this pycom Onewire DS18X20 tutorial but the output is again looking for something that doesn't exist:

    Running main.py
    Traceback (most recent call last):
      File "<stdin>", line 9, in <module>
      File "/flash/lib/onewire.py", line 162, in __init__
      File "/flash/lib/onewire.py", line 124, in scan
      File "/flash/lib/onewire.py", line 132, in _search_rom
      File "/flash/lib/onewire.py", line 36, in reset
    NameError: name 'enabXe_irq' is not defined
    >
    MicroPython v1.8.6-422-g516b861 on 2017-02-07; SiPy with ESP32
    Type "help()" for more information.
    >>> 
    

    at line 36 in the onewire library it is enable_irq(1)... not enabXe_irq. Paymkr is replacing the 'l' with 'X'???



  • @bucknall
    Ok all libraries seem to be in the right place now. My main.py:

    import os
    import pycom
    from machine import Pin
    from ds18x20 import DS18X20
    
    #pycom.rgbled(0x000000) # rblack
    
    d=DS18X20(Pin('G17', mode=Pin.OUT))
    result=d.read_temps()
    print(result)
    machine.idle()
    

    My output however gives this error:

    Syncing the project with the SiPy. Please wait...
    Successfully synced!
    
    
    MicroPython v1.8.6-422-g516b861 on 2017-02-07; SiPy with ESP32
    Type "help()" for more information.
    >>> 
    
    Running main.py
    Traceback (most recent call last):
      File "<stdin>", line 8, in <module>
      File "/flash/lib/ds18x20.py", line 47, in __init__
      File "/flash/lib/onewire.py", line 246, in scan
      File "/flash/lib/onewire.py", line 274, in _search
      File "/flash/lib/onewire.py", line 148, in write_byte
    NameError: name 'pin_lalue' is not defined
    >
    MicroPython v1.8.6-422-g516b861 on 2017-02-07; SiPy with ESP32
    Type "help()" for more information.
    >>> 
    

    "pin_lalue" isn't in any of my files or libraries? Why is it looking for something that doesn't exist?



  • @bucknall
    Ok so I made a new project called 'TempSensor' and in the same folder of this project I made another folder called 'lib'.
    Inside lib folder I pasted the ds18x20.py, onewire.py and onewire.diff libraries.
    Then in the project folder I made boot.py:

    from machine import UART
    import os
    import machine
    uart = UART(0, 115200)
    os.dupterm(uart)
    

    and main.py:

    import os
    import pycom
    from machine import Pin
    #from ds18x20 import DS18X20
    print(os.listdir('/flash'))
    pycom.rgbled(0x000000) # rblack
    #d=DS18X20(Pin('G17', mode=Pin.OUT))
    #result=d.read_temps()
    #print(result)
    machine.idle()
    

    Then I synced and then ran my program and this is the output:

    Running main.py
    ['__init__.py', 'sys', 'lib', 'cert', 'TempSensor.py', 'main.py', 'boot.py', 'project.pymakr']
    >
    MicroPython v1.8.6-422-g516b861 on 2017-02-07; SiPy with ESP32
    Type "help()" for more information.
    >>> 
    

    As you can see the library is still not there. But if I go

    print(os.listdir('/flash/lib'))
    

    The output says its there:

    Running main.py
    ['ds18x20.py']
    >
    MicroPython v1.8.6-422-g516b861 on 2017-02-07; SiPy with ESP32
    Type "help()" for more information.
    >>> 
    

    Why doesn't it show the onewire.py/diff?


  • administrators

    @sk it looks like your ds18x20.py didn't upload to the SiPy. To use the sync function in Pymakr, to copy your code over to your SiPy, you need to first create a project.

    Once you're got a new project, if you create a folder called 'lib' and place the ds18x20.py into this folder and then press sync, it should put it into the lib folder!



  • @bucknall

    Running TempSensor.py
    ['boot.py', 'sys', 'lib', 'cert', 'main.py', 'project.pymakr']
    >
    MicroPython v1.8.6-422-g516b861 on 2017-02-07; SiPy with ESP32
    Type "help()" for more information.
    >>> 
    

    So How can I add it to lib?


  • administrators

    @sk I think you need to either wrap the code in a print statement to see an output

    print(os.listdir('/flash'))
    

    or run it from the REPL to see the output

    >>> import os
    >>> os.listdir('/flash')


  • @bucknall I did this in my tempsensor.py file:

    from machine import Pin
    #from ds18x20 import DS18X20
    import os
    os.listdir('/flash')
    #d=DS18X20(Pin('G17', mode=Pin.OUT))
    #result=d.read_temps()
    #print(result)
    

    Which gave this output:

    Running TempSensor.py
    >
    MicroPython v1.8.6-422-g516b861 on 2017-02-07; SiPy with ESP32
    Type "help()" for more information.
    >>>

  • administrators

    @sk Ok, when you import the module ds18x20 it should work fine if it's in the same folder as your tempSensor.py.

    If you open your REPL (either in Pymakr or another tool) and type the following commands, what is your output?

    import os
    os.listdir('/flash')
    

    This should show your the file structure of /flash



  • @bucknall im running from my tempsensor.py.


  • administrators

    @sk is this from your main.py or your tempSensor.py?



  • @bucknall
    How do I structure it that way. Currently when I open up a project I have all my py files in /flash i.e boot.py, main.py, ds18x20.py and my tempSensor.py are on the same folder.

    ![0_1487285028222_Capture4.PNG](Uploading 100%)


  • administrators

    @sk where have you placed the ds18x20.py file? Normally I use this file structure for my library .py file (imports):



  • @bucknall

    from machine import Pin
    from ds18x20 import DS18X20
    d=DS18X20(Pin('G17', mode=Pin.OUT))
    result=d.read_temps()
    print(result)
    

    ![0_1487284020711_Capture4.png](Uploading 100%)


  • administrators

    @sk Could you please post a snippet of your code so we can see what the issue might be?



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