Go Down

Topic: arduino ATtiny85 (Read 896 times) previous topic - next topic


hello all,
I am creating a small system of temperature and humidity detection using arduino in different places located several tens of meters between them.
So that the temperature sensors lose the signal after a few meters would then implement a system in such a way that the sensors communicate with arduino via a RS485 cable.
so I have to create an electronic circuit where I connect the temp sensor. an ATtiny85 which sends the read data to a SN75176 then using a cable rs485 I connect to another SN75176 installed on arduino.

My problem is that I do not know how to connect the pins of the ATtiny85 pin SN75176. Have you by any chance a wiring diagram?
My project is right? Other electronic parts are missing?




I use some ATtiny85-s for the same purpose, too...
But I connect them via one data cable with the  central...
The central pulls it high when it wants to talk to someone...
Then it calibrates the 1-bit (e. g. 20usec low) and the 0-bit (e. g. 10usec low)...
Then it sends the address of the ATtiny85 it wants to talk to...
Then it sends the request including a parity byte...
Then the ATtiny85 starts talking by pulling down the line...

U need less cables and less hardware, but it still works... :)


Go Up

Please enter a valid email to subscribe

Confirm your email address

We need to confirm your email address.
To complete the subscription, please click the link in the email we just sent you.

Thank you for subscribing!

via Egeo 16
Torino, 10131