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Communication between multiple minis

Netduino Mini i2c spi uart rs232 Bus Communication

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#1 Sulzi

Sulzi

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Posted 28 June 2014 - 01:36 PM

Dear All,
I have completed several projects with the mini and the netduino plus. I am now tackling a project with 8-9 minis and a PC. The minis need to report data to the PC. I would like to connect the minis by means of a bus like i2c, spi, can, or similar (minimal wiring). The amount of data transmitted is small (few bytes); the frequency is only 2Hz. The distance between devices is about 1 ft (30 cm). The environment is somewhat noisy (electric motors are 2 feet away).
Which bus is most suitable for bi-directional communication among minis.
Thanks for your suggestions!

#2 Sulzi

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Posted 12 July 2014 - 06:31 AM

In lack of any better suggestions I have implemented a solution with a TTL multiplexer in the master. This allows to implement a polling mechanism where the master can quiz the slaves. Of course there has to be an adequate amount of sanity checking in case the slaves do not behave as expected (timeouts, etc.).

If time allows, I will give CAN bus a try (requires additional hardware that is somewhat expensive).







Also tagged with one or more of these keywords: Netduino Mini, i2c, spi, uart, rs232, Bus, Communication

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