I now have working setup with a TinySensor + Rasberry Pi acting as an emonbase. I previously used PHP for this task, but the PHP serial class seems to have some issues on the transmission part plus it was a…
Solar Funky
I thought it would be a nice experiment to put the Funky in a solar-powered garden lamp. I got one recently with the intention to use it for that particular experiment, it is quite cheap, costs a little over one…
64 800 transmissions
The CR2032 battery powered TinySensor that I had set up to monitor my house’s power consumption has stopped sending packets yesterday afternoon, totaling 7.5 days of transmissions every 10 seconds. That would mean 6 * 60 * 24 * 7.5 =…
Getting Funky
Catchy title, right? I ordered some Funky Sensor PCBs after few days ago and got them today. Just to recap – this is an extremely small Attiny84 based sensor with RFM12B module on top. I can’t stress how small it…
CR2032 powered “current only” remote monitoring
I am experimenting these days with one of the old versions of the TinySensors trying to see how long it can go with some heavy duty tasks, powered only by a single CR2032 battery. I wrote a small sketch to…
TinySensor Wiki
I have created a TinySensor Wiki, it is available from the top menu and this link. I will be extending it as time permits.
TinySensor 1.4 PCB is ready
I now have the TinySensor v1.4 in my hands, there are some small improvements over the version I last published, most notably that I added a 3.3V FTDI connector. You can’t use it to program the Attiny (..yet, I am…
Setting up Arduino IDE for working with Attinys
There are a number of posts on the subject already, but I’d like to share my experience as well. Here are the steps I undertook to set up my environment for working with Attiny84 and Attiny85: As a first step,…
DIY soil moisture sensor project
I have been working on a small DIY soil moisture sensor project the last couple days, mostly inspired by the gardenbot project. The idea is to add it to my greenhouse monitoring project. I chose to make my own sensor…
TinySensor v1.4 plans
I have been working to upgrade the TinySensor v1.3 to a new version these days, that addresses the issues I had identified so far. I am keeping it in through-hole components for easy soldering and also so that one can easily…
Using a LDR (light dependent resistor) and DHT11 temp/humidity sensors
I got my hands on a LDR yesterday and figured that it will make a nice addition to a greenhouse monitoring project that will pick up light intensity, air temperature and humidity plus soil moisture and send that information to…
RFM12b to serial PCB for my Pi
[edit] This board is now available for sale in my store Here is a little project that I worked on last weekend: A small home-made PCB to permanently fit the RFM12b-to-Serial on my Raspberry Pi. Although I am aware of at…
Stamp sized ATtiny84 remote sensor
I have been amazed by the work done by @Tobias with his “Funky” sensor, so I asked him for a permission to make my own version. The Funky is a JeeNode micro clone, less the two Jeeports and probably in…
Using ATtiny 84’s internal temperature sensor
I have always wanted to test the internal temperature sensor that the ATtiny84 has. I think it is quite nice for a really low power node since no external hardware is required. I googled for some time and found a…
Power saving techniques for the Attiny84 powered TinySensor
I have been working hard to cut power consumption on the TinySensors so that they can run on the CR2032 battery that is on the back of the PCB. I have one of the sensors is sending room temperature for…