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M-Bus is a building management side protocol which helps to communicate with the controller to get the available parameter values like current, voltage, power etc. I have to develop an architecture which helps to get the data from Meters using the available protocol as M-Bus, I've STM32F030 controller and a datasheet of M-Bus, after searching a lot I couldn't find any working library, so is there anyone who has worked in this field please help.

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You could try mbus/libmbus that uses bitbanging so it only needs 4 GPIO. You could use it on almost any microcontroller.

It was not updated for 6 years but you could give it a go, even update it if needed.

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