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Safe and Sound
Blog Safe and Sound : Winter/cold weather survival suit Post #10 (Help needed and an update)
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  • Author Author: dwinhold
  • Date Created: 14 May 2017 2:52 AM Date Created
  • Views 1590 views
  • Likes 4 likes
  • Comments 14 comments
  • winter
  • safe & sound
  • dwinhold
  • winter survival suit
  • cold
  • onewire
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Safe and Sound : Winter/cold weather survival suit Post #10 (Help needed and an update)

dwinhold
dwinhold
14 May 2017

I'm not sure how much of an update this is considered. I am having issues with the temperature sensors (DS18B20 Temperature Sensors) which are OneWire. Now the issue is that they don't work on the MSP432P401R. I have tried everything in the past 2 weeks and a lot of different coding to no avail. I copied and pasted code and even used the code in Energia for the OneWire temperature sensors and nothing worked. I found some information on line saying all the coding for the sensor works on the MSP430. When I used the sample code and compiled it for the MSP430 it worked, but it crashes for the MSP432. Since this is what I require to finish my project I require help on finding the correct sensors. I have the suit complete with the heat elements sewn in. The power supply is ready and wires are run throughout the suit, I just need working sensors.

 

A quick update on the waterproofing of the board with the acrylic conformal coating. I filled a tray with water and added salt (quite a bit of salt), powered up the test Arduino and set it into the salt water for 2 hours. (I kept the plugged-in end out of the water). I then took it out and let it dry off (It kept working and I didn't wash it off). A week later (2 days ago) I plugged it in and it is still working so I put it into another tray full of salt water for 1 more hour (It still is working). I did wash it off with clean water and it is no worse for wear, I am very impressed with the coating, giving me different use ideas for the future.

 

So, I require any help or advice available

 

My question to everyone, what temperature sensors work on the MSP432? Since I already spent money on sensors that don't work, I need to get the correct ones (Quickly).

 

Thank you for any help you can give

 

Dale Winhold

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Top Comments

  • balearicdynamics
    balearicdynamics over 8 years ago +3
    Hi Dale, it seems that the 1-Wire temperature sensors (and other sensors) interfacing with the MSP320 reports some well-known issues. This is one of many links I have found about this problem: https:/…
  • Jan Cumps
    Jan Cumps over 8 years ago +2
    Can you post the code that works on the MSP430 and crashes on the MSP432? More eyes can have a look at it then. I don't have the DS18B20 but there should be no reason why the MSP432 would be unable to…
  • Jan Cumps
    Jan Cumps over 8 years ago +2
    ... logging a help request on the e2e.ti forum, under MSP342 area, also often helps. Certainly when you make clear that you are a beginner and that you're participating in this design challenge.
  • dwinhold
    dwinhold over 8 years ago

    Problem solved, cost money needlessly though. I got so frustrated I purchased LM35 sensors as I couldn't for the life of me get the one wire sensors working. I bought the new sensors through Newark and they arrived Friday (Great delivery time). Did a simple program to test them, didn't work. Tried for the past 2 days with no avail, searched online finding that others had the same issue but no answers. Finally came across a posting in one forum from a week ago by someone having the same issue but there was a reply that solved everything, it read, "There is an issue with Energia and the MSP432 boards, there is an update now released for this board that fixed the sensor reading issue. If you are using version 1.6.0 you need to update to 1.6.1"

    So I updated to the new release, re-compiled my coding and guess what.... It works, my original code works with the sensors. I will include this in my next blog as I am now able to continue on my project and write a good update to everything!!!\

     

    Dale Winhold image

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  • mcb1
    mcb1 over 8 years ago

    dwinhold

    4k7 is the 'default' value for the pullup resistor.

     

    Pascal ( verrverr  ), one of the challengers in Forget Me Not had some issues with multiple sensors at distance and resorted to different value resistors.

    Pas Home / 1-wire vs Tektronix oscilloscope

     

    Mark

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  • Jan Cumps
    Jan Cumps over 8 years ago in reply to Jan Cumps

    Here's the article: Make a Logic Analyzer from your Dev Kit Part 1: Arduino UNO

     

    No hardware needed except the Arduino and a few wires. Good enough to capture a 1-wire exchange.

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  • Jan Cumps
    Jan Cumps over 8 years ago in reply to dwinhold

    the 1-wire protocol doesn't mind the width of the controller. if you have a logic analyser or bus pirate,(you can make a logic analyser from an arduino - I have a blog with the instructions here on e14) you could see if any data is arriving. I'd still check the e2e community ...

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  • dwinhold
    dwinhold over 8 years ago in reply to DAB

    Hi DAB,

     

    Thank you for the help!! I think the 32 bit MSP432 might be the issue for the sensors that I bought don't work.

     

    Dale

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