Robots and Physical Computing

Friday 3 April 2020

BBC micro bot - tweeting BBC Basic (updated)

I assume others have been playing with it for a while, but yesterday I can across the BBC Mirco Bot site https://www.8bitkick.cc/bbc-micro-bot.html - where you tweet @bbcmicrobot and run BBC Basic code on BBC Micro emulator. It returns a video of your code running.

For those of us, who either had (I didn't - ahh) or wanted a BBC Micro (that is me) it is a cool thing; combining tweeting and programming on one go.

I had a go yesterday

Last try@bbcmicrobot

10 REM Area of a circle
20 Radius=5
30 MODE 8
40 FOR loop=1 TO 20
50 MOVE 150,200
60 PLOT 145,Radius*loop,0
70 NEXT
80 RUN
— Dr Scott Turner (@scottturneruon) April 2, 2020

This was returned

pic.twitter.com/hGnijtpx0T
— BBC Micro 🦉 bot (@bbcmicrobot) April 2, 2020

Have a go it is fun.

@bbcmicrobot
10 MODE 18
15 FOR i=1 TO 15
20 COLOUR 128+i
30 PRINT TAB(29,10);"Twitterchats Rock "
50 PRINT TAB(36,10);"#LTHEchat #CASChat"
70 NEXT i
— Dr Scott Turner (@scottturneruon) April 12, 2020

pic.twitter.com/Tr88quumGG
— BBC Micro 🦉 bot (@bbcmicrobot) April 12, 2020

All opinions in this blog are the Author's and should not in any way be seen as reflecting the views of any organisation the Author has any association with. Twitter @scottturneruon

Wednesday 11 March 2020

Podcast physical computing, IoT, Industry 4.0 and others

I was lucky recently to invited to participate in a podcast on wide-ranging topics with Drs Michael Opuku Agyeman and Triantafyllos Kanakis. The discussion roamed around computing, physical aspects of computing, social benefits of technologies, industry 4.0, our research and a whole lot more. Good fun.

The podcast can be found below:

All opinions in this blog are the Author's and should not in any way be seen as reflecting the views of any organisation the Author has any association with. Twitter @scottturneruon

Tuesday 3 March 2020

Friday 31 January 2020

Saturday 28 December 2019

Adafruit PyPortal from Twitter to weather

I have had the Adafruit PyPortal for a while and finally got around to playing with it. The PyPortal cames as part the Adabox011

1. Getting going

PyPortal contains a colour TFT touch screen; speaker; NeoPixel; sensors for light and temperature sensor; microSD slot; ports for I2C and pins for either analogue or digital; with built-in 8MB flash memory. It uses both CircuitPython and Arduino. In this post, CircuitPython is used. A more detailed overview of the device is available at https://learn.adafruit.com/adafruit-pyportal

To set it up I started from https://learn.adafruit.com/adafruit-pyportal/updating-your-pyportal, I already had CircuitPython installed so skipped ahead after updating the firmware to PyPortal CircuitPython Setup and then the enjoyable bit Internet Connect!

2 From Twitter to Weather

Time to play. There is an interesting example, developed by John Parks (https://learn.adafruit.com/users/johnpark) PyPortal Twitter Follows Trophy (https://learn.adafruit.com/pyportal-twitter-follows-trophy) which turns the PyPortal into a 'scoreboard' for twitter follows. The first few sections describing setting the system up in terms of CircuitPython, internet connection and updating the firmware, similar to the links above. The code starts at https://learn.adafruit.com/pyportal-twitter-follows-trophy/code-pyportal-with-circuitpython the description is really useful and essentially uses JSON information about followers and displays it on the PyPortal.

Using this code as the core of a new project, the device was changed to collect weather data for the current weather (and yes I do know I can just look out of the window but this seems like fun) from a website.

To get started a source of the data was needed and a company Weather Unlocked: https://developer.weatherunlocked.com/ provides a service for local current weather information via their 'Local Weather API' in JSON form. You need to sign in and create an APP_ID and APP_KEY, these are needed in the next stage. In the code, modify DATA_SOURCE = "https://cdn.syndication.twimg.com/widgets/followbutton/info.json?screen_names="+TWITTER_NAME to something like DATA_SOURCE = "http://api.weatherunlocked.com/api/current/51.50,-0.12?app_id={APP_ID}&app_key={APP_KEY}" with APP_ID and APP_KEY substituted and 51.50,-0.12 changed to the longitude and Latitude of your choice.

Using the URL Code Beautify (https://codebeautify.org/jsonviewer) and you can look at the JSON output to get a sense of how the data is structured and see the information produced.

There is a weather description wx_desc, so the code was changed to use DATA_LOCATION = ["wx_desc"] the rest is minor tweaks on the original John Parks code.

Change to DATA_LOCATION = ["temp_c"] and get (not surprsingly) the temperature.

The code used is here:

3. Overview

I enjoyed playing with this so far and look forward to playing with it a bit more. Thank you to John Parks for such a good starting point and WeatherUnlocked for such a useful feed.

All opinions in this blog are the Author's and should not in any way be seen as reflecting the views of any organisation the Author has any association with. Twitter @scottturneruon

Monday 23 December 2019

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Tuesday 17 December 2019

Playing with Adafruit Circuit Playground BlueFruit

It is always a moment of excitement (perhaps I need to get a life) when the Adafruit Adabox arrives, this time is no exception with the arrival of the Adabox014. Inside there was a great mixture of things for making snow globes based around two devices TFT Gizmo and the Circuit Playground Bluefruit; this post is considered with an initial play with the Bluefruit.

Bluefruit is a small Circuit playground with the addition of Bluetooth or more accurately Bluetooth Low Energy (BLE). If you have played with the Playground express it is very similar. To experiment I wanted to play with the neopixels on the board through Circuit Python,

The starting point https://learn.adafruit.com/adafruit-circuit-playground-bluefruit/overview to get a bit of background and then to follow the links to how to get it all happening with Circuit.

Task I wanted was to use it, using circuitpython on the Mu editor to control random colours cycling through all the neopixels and in reverse order turn off (the code used is near the end of the post- please feel free to use it, if it is of use. A video at the end show the board in action.

Adafruit have provided a great starting point with the post at https://learn.adafruit.com/adafruit-circuit-playground-bluefruit/circuitpython-neopixel, in fact, I am using part of the code for the initial cycling through the pixels for my solution and modified version to turn the pixels off in reverse order. You will need to add neopixel,mpy available from https://circuitpython.org/libraries to lib folder on the Bluefruit but that is just a drag and drop exercise, name the routine code.py save with the board attached and that is really it.

In summary, this is a cool little board, very much in-line with the previous Circuit Playground boards and I looking forward to playing with it a bit more. The fact it can be programmed in different languages (as could the other boards) including the friendly MakeCode makes it interesting.

All opinions in this blog are the Author's and should not in any way be seen as reflecting the views of any organisation the Author has any association with. Twitter @scottturneruon