Hi
Thank you very much for all suggessions.
RF link I am not sure because this thing is to be deployed in a fishing vessel.
(Not a titanic, smaller
)
will RF transmitters like this(433Mhz RF TxRx pair) reliable on a matalic structure like boats and ships?
My preference is for RS 485 from the opinions above.
Let me search and collect more details to impliment a RS485 link for my purpose.
links are welcome.
Thanks a lot again.
PIcstudent
Later..
We can impliment this circuit using Sn75176 (available cheep locally! ) right?
Then what is the extra benift if we use MAX485?
As i understand
transmitting side(slave) Potentiometer , PIC with ADC and USART, and SN75176,
receiver side(Master) - SN75176, PIC with USART and display or whatever.
PIC in the control room( , Master - enables transmition of 75176 and send a packet with command and data if required. and disables transmition and waits for response.
Receiving slave PIC always in receive mode of 75176 . When its usart receives a packet checks the command in the packet , takes the appropriate data, enables transmition to 75176 and sends the desponse packet and returns to receive mode.
So the use of 75176 in my case will be only to derive this 485 differential bus. (No addressing or multi Node in my case)
Also the only change from normal USART code in PIC will be a special enable disable transmition pin control. Am I right?
Any schematics?
What will be the advisable baud rate for my purpose?
Thanks
picstudent