Vermes
Advanced Member level 4
The device is a small module based on ethernet and bluetooth with two relays. Additionally, a temperature sensor like DS18B20, DS1820 or DS18S20 etc. can be connected to the ISP socket.
What is it for? It can be used to remotely control devices which are connected to relays or by bluetooth. Example: You can connect to it by ethernet and switch on light, computer or something like that or you can send something to a device connected by bluetooth like a device for commercials – changing its text to an actual. As it was written before, it can also measure temperature, therefore it can work as a remote temperature point.
To build the whole device, a standard module was used: **broken link removed** to which an Eagl library exists and can be used for creating new circuits. Below pictures show elements from the library on schema and PCB:
The network card is connected to the mainboard by ISP socket:
The picture shows a BTM-112 module which was used for testing (a better choice is BTM-222).
The program was written in C. Examples and TCP stack can be found here Electronics and science fun
Link to original thread – Ethernet - Bluetooth, przekaźniki itp