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Topic: Difference between old and new yun (Read 113 times) previous topic - next topic

max3101

Hi

I have two different arduino yuns(R4 and V5) that I'm using for a project with sensors operating on I2C.
I'm loading the same firmware but the V5 board cannot operate at a I2C bit rate of 400Khz; The R4 model can.

I'm not sure if i'm battling with a difference i the bootloader or if its due to signal integrity caused by a different board layout. I'm well aware that my wiring and stray capacitance, in between sensors and board, are way out of normal use as this/I2C of course is intended for onboard use!!!

Did anyone else ever used the yun V5 succefully at 400Khz(Using the Wire.setClock(400000L) command)??
I see here that the newest version should be R5 and not V5?? Are there any difference between a R5 and V5 board?? For sure there is a difference on R4 and V5.


There a lot thing to investigate here but before I used too much time on it I would just like to know if somebody else has had the same experience.

Br

ballscrewbob

Do they both have the same firmware / OS etc ?

That could explain a difference.
It may not be the answer you were looking for but its the one I am giving based on either experience, educated guess, google or the fact that you gave nothing to go with in the first place so I used my wonky crystal ball.

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