3 ms·
It doesn't connect to a smartphone, but I have a device about the size of a TV remote I use for measuring interference that would pick this up. It cost me about
by devmor 5y ago
It doesn't connect to a smartphone, but I have a device about the size of a TV remote I use for measuring interference that would pick this up. It cost me about $9 in parts minus the arduino and 3D printer resin to make.