What opinions do people have about remote sensing? I have assumed that i would be using 1 wire for any remote sensing like temperature, switches but how do i do remote ADC of sensors? It appears 1wire ADC are obsolete now?
What other wire techniques can i use? CAN BUS(isn’t this for cars?)
This module from Seeed works well. I use it myself to record analog sensor data with a G120 based Cobra 2 board. I have some more in development for a commercial project now that I know it works.
You can use the IO ports to switch remotely too. No processor needed unless you want remote calculation of some sort but the G120 receiving side can do all that.
You can add the battery and solar panel to suit.
This can talk to the G120 if you get the XBee carrier board (Assuming you are using the G120HDR or you can add it to your custom board if that’s the route you are taking)
Wired would of course work and be a little cheaper but you then have the hassle of running the cable and getting power to it. You can then use either CAN bus or RS485 etc. This assumes you will have a processor at either end of course.
Local Interconnect Network. A low cost alternative to CAN for short distance communications. Not multi-master like CAN but more poll and response like RS485 master/slave type network.
anthonys, I know you said Ethernet was overkill, and it could be, but don’t forget PoE (power over ethernet). It sounds like you will need some processing and power at the control end.
You can get an ethernet Gadgeteer board like the FEZ Cerbuino Net.
The link to the library is certainly interesting as I work with a number of devices that use Modbus and was in the process of creating a driver for this. I do need serial RTU though so would have to look at adding this protocol.