Discussion in "Hardware" started by    SagarMengar    May 31, 2010.
Mon May 31 2010, 10:30 am
#1
hi,

i want to interface two pic controllers for information or command exchange serially which are separated with each other for let say 20 to 50 meters.. so i want to use rs485 standard...
can any one help me up how can i design hardware for this...


regards,
sagar mengar
Mon May 31 2010, 10:46 pm
#2
hi,

first u hav to learn the rs485 protcol........ which has master & slave concepts...... hard ware is standard so don wan to worry on it.... use max485

 SagarMengar like this.
Tue Jun 01 2010, 09:42 am
#3
thnks pravin,

okey i got yr point,
can u suggest me some reference document on rs485 which is good for understanding and easy to learn....

thnks a lot brother....!!!

regards,
sagar
Tue Jun 01 2010, 12:10 pm
#4
hii.....

learn this pdf fully u can understand about modbus protocol............. if u hav any clarifications.... feel free to ask me........

Tue Jun 01 2010, 12:34 pm
#5
hello, i am starting programming programs whitch communicate between two pic18f6520. (it is possible to use spi also, but what is maximum cable lenght between spi devices?) the protocol should be very easy. it will be send only 2-4 bytes at o...
Tue Jun 01 2010, 02:00 pm
#6
hi,

it will support only for maximum 4mtrs...........

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