the personal site of rob dobson
Amazon Fire 7 tablets, used for home automation, can develop swollen batteries when permanently charging. But they won't boot without a battery so I adopted a modified approach based on a Great Scott YouTube video.
Creating a Watch which tells the time in words. Inspired by QLockTwo - tells the time in military "crossword" format.
Wouldn't it be great if snow globes snowed continuously?
An overengineered door opener so that our cat doesn't get cold!
For my son's Christmas present last year I made him a pair of heart-rate monitoring earrings with pulsing LED display in the form of a human heart. They can also be used as a BLE heart-rate monitor. From a design perspective they focus on power management and battery life. They have received a lot of complients and some enquiries about availability for purchase.
In the latest post of this series we look closely at the publish-subscribe (pubsub) mechanism built into Raft and use it to publish data from our Inertial Measurement Unit (IMU)
Continuing with the series on developing a connected device using Raft, we now add support from an I2C IMU.
The next installment of creating a connected app using Raft. This time we start to add functionality to control an LED ring.
Using the Raft framework to program a connected device with BLE, WiFi and Serial comms. Publishing data from accelerometers and other sensors and displaying information on addressable LEDs.
This is the first part in a series where I create firmware for a connected device using the Raft framework. Raft makes it simple to develop apps conntected via BLE, WiFi or serial and featuring publish-subscribe, web server, automated device detection and REST APIs.