Good morning sir,
is there any possible to make a flow on node-red manually without using rpi-srf. This flow should exactly do the work of rpi-srf. That sounds not a logic question but I am trying to connect that sensor to an IoT gateway. Node-red is ready installed on this gateway but the GPIO has a different form as on rpi (for example digital port nr:8 defined as “D8” ). By using rpi-srf it’s not possible to assign trigger and Echo as D16,D18.
As you see in the attached photo I was able to make a flow to control trigger and my question how can this flow be extended to read the ECHO signal and calculate the distance?