Custom commands in Blynk

Hi,
I’m currently trying to figure out if Blynk framework supports extended functions. For instance, I want to expand functionality to cover stepper motors or retrieving data from other Arduinos via SPI. Up to this moment, I don’t know how to add the firmware so if I can route buttons commands to direct stepper motor or get values fetched from other hardware to chart

Hello. Did you see our docs? I think what are you asking is :

http://docs.blynk.cc/#blynk-main-operations-virtual-pins
http://docs.blynk.cc/#widgets-other-bridge

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