Counter Rate not calculating(?)
As I'm getting into playing with the system a bit, I'm gradually trying out features. Tonight I tried using a counter, but I'm getting no rate information.
The setup: NodeMCU over TCP/IP with an old CPU fan connected to VIN(4.7V) using the RPM sense output going to GPIO. I checked the amplitude of the sense on my scope and it is <3.3V and seems to be registering OK since the count is going up at about 60/second. The rate information is not changing however, (stuck at zero). I reread the manual section on counters, and tried adding some math functions for the rate (even just *1) to see if it would change it, to no avail. Adding a linear offset does show up in the displayed rate.
Any advice would be appreciated. I'm sure I'm missing something simple, but I can't seem to figure out what.