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Wireless Communication between PC and PIC micro

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IshaG

Sun Apr 20 2008, 07:08PM

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AJAY
data between PC and micro will not be CONSTANT it will be changing at regular intervals.
It contains 4 fields of information..each of approximate 10 bytes....this information can be sent in packet format or individually one aftr the other...which one u think is reliable????....
PC is the one generating the information and a copy of this information will be transferred in a cascaded manner to each uc in the chain....till the the last uc....and ACK generated by each uc is tranferred to the PC again in a cascaded manner....
Thanks for ur help

tyagiG

Sun Apr 20 2008, 07:41PM

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hi, u r using a good concept but can u be nrief abt its apllication.

aditya:
[color]

shyam

Sun Apr 20 2008, 08:46PM

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Isha

make a struct like

CODE:

struct Packet_Send

{

      char destination_Add[4];//any code say "s4b2"  that wiill be rcver address

      char My_Add[4];             //  senders address

      char Packet[10];             //this is the exact data

      unsigned char Packet_Index;                //packet no

                                                                  //this is index to check if a data has been  

                                                                  //missed

}Packet_Send1;

main()

{

Packet_Send1.Packet_Index =1;  

strcpy(Packet_Send1.MyAdd,"SK");

strcpy(Packet_Send1.destination_Add,"IG");

strcpy(Packet_Send1.Packet_Add,"Hello IG");

send_RTS_Packet( Packet_Send1.destination_Add);

while( Rcv_ACK(Packet_Send1.destination_Add));

Send_Data_Packet(Packet_Send1.Packet,Packet_Send1.Packet_Index );

Packet_Send1.Packet_Index++;

strcpy(Packet_Send1.Packet_Add,"BYE  :bye ");

Send_Data_Packet(Packet_Send1.Packet,Packet_Send1.Packet_Index );

.

.

.

.

.

.

.

}

lProgress is not made by early risers or hard workers, but by LAZY people, trying to find easier ways to do the same........

IshaG

Mon Apr 21 2008, 08:22PM

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Thanks shyam..this will help will go through it and consult u for queries....i am working on the code now...and will seek for ur guidance in future also...thanks a ton...

[ Edited Mon Apr 21 2008, 08:25PM ]

Ajay

Tue Apr 22 2008, 03:03AM

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isha one more thing as you know there is data in 4 fields with 10 bytes each, so i was asking if those 10 bytes are constant or they can vary? And you can send in single frame only, specifying number of bytes in each of 4 sections. This way it will be easy to extract on the other end. Reason for sending in one frame is making the communication protocol simple to implement.

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IshaG

Sun Apr 27 2008, 08:20PM

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The length of the data in the packet will vary and so does the information also.i was wrong wen i quoted that it'll be 10 bytes each.infact the fields can also vary.
or may be i can keep the length of packet large enuf to accommodate information accordingly..can i do dat i.e. i can put small information also as well as large info also in the same packet may be by separating the information in the packet by some special characters like % in the data part of the packet.

also can u tell me that "Can a bluetooth master differentiate btw the slaves on the basis of distance i.e. can it tell wich one of the slave is near to him and wich 1's far?..."

sashijoseph

Sun Apr 27 2008, 11:46PM

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IshaG wrote ...

also can u tell me that "Can a bluetooth master differentiate btw the slaves on the basis of distance i.e. can it tell wich one of the slave is near to him and wich 1's far?..."

Think it can be done using the RSSI field......dunno about the resolution though..like how much signal strength variation would register.

Let there be music........

Vishay

Tue Apr 29 2008, 07:12PM

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Hi,
I would like to do something similar like Monica mentions. I want my PC to to talk to the PIC using wireless..but i don't know which communication to use..rf, zigbee, bluetooth..am quite new to communications thingy..could you guys gimme some ideas please?. I would really appreciate that..

thanks a lot!!