can the computer talk to particular 1 arduino board asking for returning the temperature sensor value?
APC220-43 is a semi-duplex module, which can be communicated by point to
point or one point to multi-point. In the second mode, user needs to set one host
module, while the others are client modules. Every module must only have one
unique ID. The coordination of communication is controled by the host module, which
sends datas or commands including ID. All the client modules can receive the data
packets, and compare the ID with the own’s. If they are the same,
So, no.
can the computer boardcast the same message to both arduino boards at the same time?
See above.
So, yes.
Any simple sketch code for completing the project?
So, your part of the project is to draw pretty pictures, while other people do the research and write the code?
One more question, when the client receive the broadcast message from the host, can it send back a message to the host including the temperature sensor reading? If yes, then the first question can also be achieved.
From the manual of APC, how can I set the device as host/ client?
I will post my code here once I figure out the way to do it. As all of code on the net only play around with one to one device. Hope this post can help more people.
One more question, when the client receive the broadcast message from the host, can it send back a message to the host including the temperature sensor reading? If yes, then the first question can also be achieved.
Of course the correct slave can send a response. But, that does not enable the master to communicate with a single slave.
I plan to use the APC220 in a multi-sensor network. Could not find out how to make the APC220 work in multi-point config, so decided to use timer controlled transmissions and check for incoming data (carrier detect) before transmitting every 4 hours from measurement 3 locations. A central APC220 based receiver will log the incoming data.
Below is a picture of my soil sensor and RF module prototype:
