3D Printed Cases For TinyTX and Tiny328

Another post I’ve been meaning to write for a long time. I finally got my Rigidbot 3D printer in August 2014 some 9 months later than the estimate but I was one of the lucky ones, many had to wait a lot longer and some have even had to pay extra for delivery, having already paid it once as the company […]

Letterbox Notifications

This was a quick project to add notifications for when I get real physical mail. This is something I’ve had on my mind since I made my first SMS doorbell notification system back in 2004 and I finally got around to it last month. First of all I picked up a cheap internal letterbox flap and fixed that […]

Wireless Sensor Battery Life 3+ Years On

I last blogged about this in December 2013 when the second version of my ATmega328 & DS18B20 based temperature sensor, installed on 29 December 2011, had just reached the 2 year mark on the original set of batteries. That’s pretty good going and I’d have been happy with that but how long would it last until those Energizer batteries […]

TinyTX & Tiny328 Sensors with Node-RED

Node-RED is currently taking the IoT world by storm, described as “A visual tool for wiring the Internet of Things” it is built on top of Node.js and is an open source project developed by IBM employees. It makes it easy to link various inputs and outputs adding simple or not so simple processing in […]

Wireless Sensor Battery Life 2 Years On

Back in November 2011 when I made my first ATmega328 based wireless temperature sensor node I did a rough calculation estimating that it would last 2 years or more on a couple of AA batteries. That first node was decommissioned after a few months but the second version, also based on an ATmega328 is still […]

Experimenting with the nRF24L01+ 2.4GHz radios

I thought it was about time I did a post on the testing I did with the nRF24L01+. This low cost transceiver IC from Nordic Semiconductor works in the 2.4GHz ISM band and you can find boards based on this chip very cheaply indeed, I picked a pair up on ebay for 2.89 USD including […]

OSWIN Gateway with RFM12B, SRF and OOK Support

So after getting an SRF based TinyTX and an OOK based one running I thought I should update the gateway code for my OSWIN gateway to support both types of sensors as well as the RFM12B. To receive the SRF node I’m using a Ciseco XRF in the Xbee socket and the OOK receiver is plugged in […]

Using a cheap OOK radio with the TinyTX

Going the opposite way to the last post this is a version of the TinyTX wireless sensor node using a very cheap radio setup. I first experimented with this 433MHz OOK/ASK radio pair a few years ago with an ATmega328 and the VirtualWire library but I never did much with it beyond a simple demo and […]

Using the Ciseco SRF with the TinyTX

I’ve been meaning to get round to this for a while. I bought one of Ciseco’s SRF transceivers when they first came out in October last year but didn’t get round to trying it until a couple of months ago when there were rumours of the RFM12B being discontinued and while that isn’t the case […]