Direct pulse counting

Hello,
I have been already using emoncms for monitoring electricity and PV energy for one year. Today I tried to connect pulse output from heat pump energy meter, but after couple of hours I am not successful. Pulse output is wired directly to RPi: S0+ wire to GPIO4 (pin7) and S0- wire to GND.
Emoncms config:

[interfacers]
[[pulse]]
    Type = EmonHubPulseCounterInterfacer
    [[[init_settings]]]
        pulse_pin = 7
        # bouncetime = 2
        # rate_limit = 2
    [[[runtimesettings]]]
        pubchannels = ToEmonCMS,

        nodename = TC_pulse
        prefix = tc_
        nodeoffset = 3

[[29]]
    nodename = TC_pulse
    [[[rx]]]
       names = pulsy
       datacodes = h
       scales =1
       units = Wh

This input is not listed in Inputs:

What am I doing wrong?
Thanks for answers.
Josef

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