IOT – Coding Blog

Adding a relay to a Duet 2 to switch on a router via gcode

raymond15th August 202015th August 2020 CNC / DUET / IOT

I have a duet 2 powering a CNC router, the router itself however is not attached to the duet and so needs mains power and to be manually switched on. The model I have is a workbee that has 1.5m x 1.5m axis. This blog entry shows the steps needed […]

Ultrasonic measuring with ESP8266 and HC-SR04

raymond1st August 20195th April 2026 .NET Core / ESP8266 / IOT / Rest Services

As part of some home sensors I wanted to measure the water level in a water tank. Originally I used a PI and python to do this but this proved to not be great so I switched to use a NODE MCU dev board (ESP8266 chip) linked to an HC-SR04 […]

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Coding Blog

random stuff from a software developer

Thursday, Oct 15, 2026

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Alexa skill account linking

Setting reminders from an Alexa Skill

Passing data from an Alexa skill invocation

Accessing user data in Alexa Skills

Basic Alexa rest service

Setting up an Alexa skill for testing

Azure Devops for Maui cross platform app

Ultrasonic measuring with ESP8266 and HC-SR04

Alexa skill account linking

Setting reminders from an Alexa Skill

Passing data from an Alexa skill invocation

Accessing user data in Alexa Skills

Mapping, Lat/Lon and Northings/Eastings (uk) conversions

Ultrasonic measuring with ESP8266 and HC-SR04

Alexa skill account linking

Setting reminders from an Alexa Skill

Passing data from an Alexa skill invocation

Accessing user data in Alexa Skills

Basic Alexa rest service

Category: IOT

Adding a relay to a Duet 2 to switch on a router via gcode

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Ultrasonic measuring with ESP8266 and HC-SR04

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