07-05-2025, 07:32 PM
(06-09-2025, 09:27 AM)kotyara12 Wrote: Hi!
How can I get the schematic for this board version? It will make it easier to develop firmware for it.
And another question: why don't you want to output interrupts from the input expanders to the ESP32? They are very necessary!
Hi!
I have to disagree with you. The lack of interrupts does not allow writing a handler for a pulse counter. For example, for a water flow counter or wind speed counter.
In addition, the lack of interrupts forces the programmer to poll the chip too often than necessary. You wouldn't refuse a doorbell in your house instead of walking around and checking if there is anyone at the door every 5 minutes.
On the old version (KC868-A16), I had to do some magic with the board to fix this problem on one of the two input expanders. I used the pin occupied by the RS433 receiver for this, which I do not need.
On the new version of the board, this is a little easier to do, since there are several free GPIOs. But you still have to pull the wire.