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#define CADIO_RX 20 //define custom software serial pins (SDA) (before including <CadioSerial.h>)
#define CADIO_TX 21 //define custom software serial pins (SCL) (before including <CadioSerial.h>)

#include <CadioSerial.h> //include CadioSerial library
CadioSerial cadio; //create instance

int relay[16] = {2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 22, 23, 24, 25}; //output pins
int sw[16] = {A0, A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, A15}; //switches pins

byte swLast[16]; //for saving last switches status

void cadioOrder(int index, int value) { //new order form esp
if (value > 0) {
digitalWrite(relay[index], HIGH); //change relay status
} else {
digitalWrite(relay[index], LOW); //change relay status
}
}

void sw_check() { //check real switches changes after ignoring noise
for (int i = 0; i < 16; i++) {
if (digitalRead(sw[i]) != swLast[i]) {
bool confirm = true;
unsigned long deNoise = millis();
while (millis() - deNoise < 100) {
if (digitalRead(sw[i]) == swLast[i]) {
confirm = false;
break;
}
}
if (confirm) {
swLast[i] = digitalRead(sw[i]);
sw_changed(i);
}
}
}
}

void sw_changed(int i) { //switch status changed
digitalWrite(relay[i], !digitalRead(relay[i])); //change relay status
if (digitalRead(relay[i])) {
cadio.set(i, 255); //send new status to esp
} else {
cadio.set(i, 0); //send new status to esp
}
}

void setup() {
for (int i = 0; i < 16; i++) {
pinMode(relay[i], OUTPUT); //set relays pinMode
pinMode(sw[i], INPUT_PULLUP); //set switches pinMode
swLast[i] = digitalRead(sw[i]); //save last switches digitalRead
}
cadio.begin(); //start cadio library
cadio.onOrder(cadioOrder); //get orders
cadio.getCurrentStatus(); //request all current status from esp
}

void loop() {
sw_check(); //check switches status
cadio.loop(); //check for cadio orders
}