My first attempts at remote control over here in Spain are coming together. Having had remote access to cameras for 3 or 4 years now with reasonable reliability, I’m ready to extend this to temperature and humidity monitoring and remote control of lighting. If you look at my previous articles on home control you’ll know that I’m using NETIO on Android phones, via WEBSOCKET drivers on Arduino-type boards using the WIZ Internet controller at the master end and low-cost RF24NETWORK-driven radio-controlled boards for remotes.
I recently had some boards made to comprise the Atmel 328 chip and associated components along with monitoring LEDS and the NRF24L01 low-cost radio boards as daughterboards. Here is the first of the units, in a case top – alongside a single RELAY board. This board needs USB power only (pretty standard low cost plug-in-the-wall power) and communicates with the master (and hence the remote Android or iPhone) to allow monitoring and control.
The board you see here also has a DHT11 unit attached to provide temperature and humidity readings. These are not stunningly accurate but I have calibration offsets available in EEPROM on the controller to compensate.