Raspberry Pi Forums

przemof

Split it into smaller tasks. Give us more details: "arm a system" means pretty much anything from setting I/O to 1 to sending an email to dedicated account. Your task list as I see it: 1. Make algorithm and code to measure temperature. Allow for check to trigger some actions at set temperature. 2. M...

przemof

I think your last question is no longer relevant in this thread. Start another thread?

przemof

Having problems is part of learning, so you're OK. Check if you have liblo built/installed for python2 or python3

That might help you: https://stackoverflow.com/questions/739 ... on-modules

przemof

Did you install liblo after building it?
make install is the normal way (again autotools)

przemof

What touch screen?

P.S. Why off-topic?

przemof

Run autogen.sh - it will create configure. Also read something about autotools - that'll help you in the future.

przemof

https://stackoverflow.com/questions/538 ... operations

przemof

I'll be switching main user input to rotary encoder push button. We should start a new thread in a different part of he forum.

przemof

Good few minutes (3-5?). I gave up - probably my SD card port in laptop that I used to write the card went crazy. I tried full desktop raspbian - another error. Then I couldn't even read another card, but pi was booting from it. Now I'm using external adapter and will report back if it works or not.

przemof

Hardware: pi zero w, fresh installation got stuck on:

Code: Select all

Starting regenerate SSH host keys...

Should I give it a few minutes or try to write the card again? Obviously I never checked SHA256

Edit: local file sha is OK, writing with dd went without errors. I'll try full desktop

przemof

USB-to-serial converters are cheap or you can use pi serial directly and vendor provides example c code: [1]

[1] https://www.parallax.com/downloads/sf10 ... de-example

przemof

Pi zero W + piTFT 2.8" got 8h 21m with no wifi. The wifi wasn't switched off, just disconnected.

przemof

Another variation. #!/usr/bin/env python import glob import time # DS18B20.py # 2016-04-25 # Public Domain # Typical reading # 73 01 4b 46 7f ff 0d 10 41 : crc=41 YES # 73 01 4b 46 7f ff 0d 10 41 t=23187 while True: for sensor in glob.glob("/sys/bus/w1/devices/28-00*/w1_slave"): id = sensor.split("...

przemof

Thanks! Now I understand what you've done: there is rotary_encoder.py python file (the code OP posted), providing "decoder" class that is redefined in the __main__ section to "decoder" variable. Also in the rotary_encoder.py you use import rotary_encoder! That's why I thought there is some external ...

przemof

Great! It's PEP8/F811 error. The code might work, I'm not saying it's a hard error.

What's under the import rotary_encoder? I can't find any code and it's not a standard library. And where you use that decoder class? There is some external rotary_encoder module?

przemof

Also, can you try to read the output diirectly and check that the encoder works as expected? Just print out the gpios and turn the encoder slowly

przemof

If you're sure the code is OK then the hardware is not OK - i can't help with that. You use the class decoder in some other part of the program? If you use that class in the code you posted, could you point me to that part? You have name redefinition from class to variable. No errors doesn't meant t...

przemof

I'd start with fixing the code: you have class decoder and variable decoder. On top of that you don't use that class? Try flake8, autopep8, pylint to check your code. You wrote the code?

przemof

Anyone actually uses a touchscreen in wet/cold conditions? I'll need one for a bicycle computer.

przemof

That's close, but that's a rear light [1]. Also you can buy led projector with custom logo, but I don't think it's bright enough for daylight.

[1] https://www.alibaba.com/product-detail/ ... 7815cLeHqF

przemof

I have code that scans for BLE devices and then tries to get services to determine if a device provides the service i need (heart rate or cycling speed/cadence). I do the initial scan in 4 seconds, but connecting to each device and checking services takes over 60 seconds (for 3 devices). I could try...

przemof

Yes. I.e.:

Code: Select all

date > /tmp/date_by_crontab

przemof

@123jasonwa: can you explain what you're trying to do?

przemof

I want to "do the right thing" - I'm sure it will work with my sensors, but the underlying system should be useful for other embedded projects as well (IoT controller, weather stations, smart home heating etc), so I'm trying to make it "futureproof" without knowing what sensors will be connected. I'...

przemof

Thanks for the reply! I'm making a bicycle computer [1]. So asking each device for name and filtering out those not complying should be OK. I'm mostly interested with speed/cadence/heart rate sensors. Currently I just scan for devices and present user with the results without filtering. If device gi...

Search found 161 matches

Re: Temperature

Re: Problem installing Liblo (./configure)

Re: Problem installing Liblo (./configure)

Re: Problem installing Liblo (./configure)

Re: Touch not working correct

Re: Problem installing Liblo (./configure)

Re: loop speed vs repeated statements

Re: Waterproof Touch Screen

Re: Fresh installation of raspbian lite stuck on "Starting regenerate SSH host keys..."

Fresh installation of raspbian lite stuck on "Starting regenerate SSH host keys..."

Re: Parallax SF11-C Laser Rangefinder

Re: How long will this battery last?

Re: Reading multiple DS18B20 with Python

Re: Help - Incorrect reading of magnetic encoder

Re: Help - Incorrect reading of magnetic encoder

Re: Help - Incorrect reading of magnetic encoder

Re: Help - Incorrect reading of magnetic encoder

Re: Help - Incorrect reading of magnetic encoder

Re: Waterproof Touch Screen

Re: Laser projector for RPi bike light computer

[SOLVED] Re: BLE devices with no names

Re: how to use crontab -e

Re: how to use crontab -e

Re: BLE devices with no names

Re: BLE devices with no names