If you want to add sensors to a system using ROS 2 then this is a super-quick and easy win. The same agent-free ESP32 ROS 2 node, now over the USB cable that was plugged in anyway – to the stock Zenoh router, switchable at run time, with the console still there when you want it.
Agent-free ROS 2 on an ESP32
Plug an I2C sensor into an ESP32 and watch it appear as a typed ROS 2 topic – over Zenoh, with no micro-ROS agent in sight.
Using Kindle Fire 7 Without Its Battery
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.
A Wordy Watch
Creating a Watch which tells the time in words. Inspired by QLockTwo – tells the time in military “crossword” format.
Electronic Jewelry Power Design
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.
Program a Connected Device using Raft, Part 5
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)
Program a Connected Device using Raft, Part 4
Continuing with the series on developing a connected device using Raft, we now add support from an I2C IMU.
Program a Connected Device Using Raft, Part 3
The next installment of creating a connected app using Raft. This time we start to add functionality to control an LED ring.