So is it working now? Yes, with external Pullup it works. Thank You! Short other Question: it is possible to operate several boards on a breadboard with the same power supply? Are problems to be expected if gnd is connected to all boards? Or is it better to serve the piower over the USB-Port. My Pl...

I suspect the pulse is "high", thus you want it to be pulled down. Or is the pulse low in your application? At the Pins are 3.3volts (measured with a voltmeter) and there are wired with the + connection of the electricity meter. The GND is wired to the - connection of the electricity mete...

Have you tried to configure the counter in a Device slot other than 4? There has been a report here that the 4th device wasn't counting, for as of yet unknown reasons (AFAIR), maybe this is also the case here. It doesn´t matteer which slot i take. only d2, d3 and d4 are counting,no matter what orde...

When internal Pullup ist activated by default Counter configuration is it a good idea, to pull down it external? That works against each other? Or Not?
And why should i pull the Pin down, when the Pin is pulled up as all other functional Pins?
Sorry if the questions are stupid. I´m new with esp.

The Counters are on Number 1 to 4. I had changed the numbers without effect. Only D2, D3 and D4 are working.

Hello, i have 4 digital electricity meter with S0 interface connectet to a node mcu ESP-8266. Ground is connectet from Ground-Pin in row to each electricity meter. The Devices on Pins D2, D3 and D4 are functional but the 4th device will not count. I had Connected it to Pins D1, D5, D6, D7) changed T...