Accessing MQTT Broker using websockets from Node-RED
If your broker accepts websocket connections then you can connect to it using that protocol instead of normal port 1883 connection To do so, add an MQTT node and then configure it for a...
Author: cymplecy
Installing Mosquitto MQTT broker on Raspberry Pi
Simply run sudo apt-get install mosquitto mosquitto-clients This will install and run mosquitto. But if you want it to run automatically at startup then run sudo service mosquitto start To configure how it operates,...
Gleelights: An extension of the great Cheerlights project
As anyone who knows me will testify – I’m a great fan/user of the Cheerlights project and my house is full or neopixels that are controlled by the Cheerlights API feeds. But lots of...
Using Amazon Dash button as user-friendly Cheerlights changer
Amazon Dash button re-deployed as garden #cheerlights colour changer pic.twitter.com/Eycdnj04wD— Simon Walters (@cymplecy) July 19, 2018 I’d heard about hacking Amazon Dash buttons to control stuff via a Pi but never bothered with them....
DHT11 Added to ScratchGPIO
You can now use a DHT11 Temperature/Humidity sensor with ScratchGPIO. To get readings simple use an example script like this to ask for readings once per second from a sensor connected to pin10.
Using Node-RED to play notes on a midi piano
I recently got a midi keyboard (Yamaha PSR-EW400) and have been using a Raspberry Pi to send midi data to it. Then I had this daft idea to get it to play different tunes...
AniBots for Primary
I am a very strong proponent that physical computing is a great way to carry on enthusiasm for programming after primary children have out-grown animating sprites on a computer screen. Or, in fact, getting back...
Going from Scratch to GP (www.gpblocks.org)
GP is the latest block programming language (Currently in beta testing so changes might/will occur) It is designed to be a stepping stone (or even an end-goal itself) from Scratch onto more feature rich...
Scratch2GPIO
Raspberry Pi have worked with MIT to produce a Scratch2 compatible program that runs standalone on a Pi3 or Pi2 (but not older models or PiZero series). It comes with basic gpio pin control...
Tracking robot position within an area
For a couple of years, I’ve been thinking/wanting to have a system for determining the position of a robot within a marked area. I’ve not found an economical/easy way of doing this...
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