server with another 100 microcontroller

[masud58]

Hi all

Please Help Me . I have Design A hardware and simulate it. It works very fine. if i want to comunicat each other from 100 feet , cabel need RX, TX, GND . It will be work or not? I can't like to use max 232,





Masud
http://geocities.com/matrixele/mypage

 

[suromenggolo]

Use max 485, it is for RS-485 standart comunication.

https://www.rs485.com

 

[masud58]

can i use buffer ? like 74hc04, 74hc07?

i dont like to use max 232 core.

thanks
masud

 

[Srammie]

It will probably work with RS232 and if its for hobby go ahead. If its for work.. use RS485 or I2C. Maybe if they had chinese feet

 

[pixel]

I2C is short distance communication at PCB level.

For large distance use RS485, or CAN bus.

 

[Bingo600]

Is that schematic for real ??

All receivers are connected together , and all xmitters the same.....

How will a receiver ever receive anything with no xmitter connected ?

/Bingo

 

[AVR_Luciano]

Hi!

RS-485 is the right solution to your problem.

You should call the server 'master' and the clients 'slaves'.

DATASHEET MAXIM RS-485 Transceiver
MAX485E up to 32 transceivers on the bus.
MAX487E and MAX1487E up to 128 transceivers on the bus.
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Example with RS-485
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* * * * * * * * *

I2C on long cables:

Using the Philips P82B715 I2C extender on long cables.
(Read first AN444.pdf).

P82B715 I²C bus extender:
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P82B715 Datasheet:
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P82B715 Application Note:
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One mile long I2C communication using the P82B715:
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Best regards,

Luciano