MCP23S08 inputs with counter support

[Frank-1964]

Hi everybody,

I own a KMP PRODUINo ESP32 board. This board has a MCP23S08 with 4 gpios as relay outputs and 4 gpios as inputs.

After I change the file tasmota/tasmota_xdrv_driver/xdrv_67_mcp23xxx.ino (see #20971) the relay are working properly.

Now I want to get the inputs working with sml (counter) support. At this time I have no idea how to get the counter stuff working. Can somebody push me in the right direction?

Thanks,
Frank

[sfromis]

Configuring Counter inputs is not a feature of the driver for the multiplexer, which makes sense as the Counter support is based on quick reaction to interrupts, instead of I2C and polling. If you have a "real" gpio not hobbled by the multiplexer chip, that would be a simple approach.

[Frank-1964]

Hmmm ... would you say that it is not possible to use counter support to the MCP23S08 inputs with the current framefork?

[sfromis]

I'd say that current Counter support, aiming to support relatively high frequencies, is not viable for port extender inputs. And using "Counter" instead of "counter" was to hint at this not being about the Smart Meter Interface, but about the basic Tasmota feature with straight pulse counts.

For much lower frequencies, it could be feasible to config the port extender input as a Switch, and then use rules to issue the Counter command to increment the pulse count.

What workarounds may (or not) be feasible for the Smart Meter Interface - I have no experience with the details of this feature, and can't really answer here. But if the Counter command works for those, same method might apply. I'm not really expecting this to be the case; just don't know much about how it works there.

Seeing a page like https://kmpelectronics.eu/products/prodino-esp32-v1/ suggests that you have better options than that port extender, as the page talks about a Grove connector with gpios, and additional internal connectors with even more gpio pins. Obviously, make sure that things are electrically compatible.

[stsch83]

Hi Frank,

can you explain how to get the kmp io extender work.

BR,
Stefan

[stsch83]

are this the addresses of the inputs and outputs of the mcp23s08?

[stsch83]

i had a little mistake in my mcp23x.dat file. Now it's working. Thx a lot.

[stsch83]

Is it normal, when the input is On the relay is also On?

[Frank-1964]

Congrats :-)
Yes, its the same here. I don't use the input currently, so I did not take notice of that until now :-)

[Frank-1964]

You can detatch the relays from the input with setOption ...