ESP8266 adapter for AC-SSR boards - testers needed.

// ESP8266-12 development code V0.1 by Barnabybear (consider to be non-working).
#include <ESP8266WiFi.h>
#include <E131.h> // https://github.com/forkineye/E1.31

// set the pin numbers of the in/outputs
int output_1 = 12; // (D6) pin number of output 1 to triac
int output_2 = 13; // (D7) pin number of output 2 to triac
int output_3 = 14; // (D5) pin number of output 3 to triac
int output_4 = 16; // (D0) pin number of output 4 to triac
int output_D = 15; // (D8) debug waveform output
int input_zc = 4; // (D2) pin number of zero cross input

// variables for the DMX value & dummy untill E1.31 arrives
int channel_value_1 = 255; // update & dummy values for channel data
int channel_value_2 = 155; // update & dummy values for channel data
int channel_value_3 = 55; // update & dummy values for channel data
int channel_value_4 = 1; // update & dummy values for channel data

// general variables
long int num_channels; // number of DMX values in E1.31 packet
int loop_number = 255; // number of times too/looped
unsigned int step_ends; // single loop time value
unsigned int step_delay = 30; // delay for 60Hz

// E1.31 setup
const char ssid[] = "<YOUR_SSID>"; // AP SSID
const char passphrase[] = "<YOUR_AP_PASSWORD>"; // AP password
const int universe = 1; // universe number
const int channel = 1; // start channel
E131 e131;

void setup() {
  // start serial
  Serial.begin(115200); // outputs - IP etc
 
  // set the function & state of the in / output pins
  pinMode(input_zc, INPUT); // set pin 4 as input
  pinMode(output_1, OUTPUT); // set pin 12 (D6) as output
  pinMode(output_2, OUTPUT); // set pin 13 (D7) as output
  pinMode(output_3, OUTPUT); // set pin 14 (D5) as output
  pinMode(output_4, OUTPUT); // set pin 16 (D0) as output
  pinMode(output_D, OUTPUT); // set pin 15 (D8) as output
  digitalWrite(output_1, HIGH);  // set output low / off
  digitalWrite(output_2, HIGH);  // set output low / off
  digitalWrite(output_3, HIGH);  // set output low / off
  digitalWrite(output_4, HIGH);  // set output low / off
  digitalWrite(output_D, LOW);  // set output low / off
 
  // select unicast or multicast - one must be commented out
  //e131.begin(ssid, passphrase); // unicast
  e131.beginMulticast(ssid, passphrase, universe); // multicast
}

void loop() {
  WRITE_PERI_REG(PERIPHS_GPIO_BASEADDR + 8, 0x8000); // DEBUG LOW not part of finished code
  WRITE_PERI_REG(PERIPHS_GPIO_BASEADDR + 4, 0x8000); // DEBUG HIGH not part of finished code
  num_channels = e131.parsePacket(); //if a new packet has arrived parse it
  WRITE_PERI_REG(PERIPHS_GPIO_BASEADDR + 8, 0x8000); // DEBUG LOW not part of finished code
  // do this if a new packet arrives
  if (num_channels) { // if a new packet has arrived - set new channel values
    channel_value_1 = (e131.data[channel + 1]);  // update with value from E1.31 packet
    channel_value_2 = (e131.data[channel + 2]);  // update with value from E1.31 packet
    channel_value_3 = (e131.data[channel + 3]);  // update with value from E1.31 packet
    channel_value_4 = (e131.data[channel + 4]);  // update with value from E1.31 packet
    step_ends += 870; // as we didn't look for the zero cross & set 'stop_ends' (don't have time to when a packet comes in)
    // use the value from the last loop and add some time to make the end time correct
  }
  else { // do this if NO new packet
    WRITE_PERI_REG(PERIPHS_GPIO_BASEADDR + 4, 0x8000); //DEBUG HIGH not part of finished code
    while (!digitalRead(input_zc)); // loop untill zero cross pin goes high
    WRITE_PERI_REG(PERIPHS_GPIO_BASEADDR + 8, 0x8000); //DEBUG LOW not part of finished code
    WRITE_PERI_REG(PERIPHS_GPIO_BASEADDR + 4, 0x8000); //DEBUG HIGH not part of finished code
    while (digitalRead(input_zc)) { // loop untill zero cross pin goes low
      step_ends = micros(); // set time to now - saves a little time doing it in this loop
    }
    WRITE_PERI_REG(PERIPHS_GPIO_BASEADDR + 8, 0x8000); //DEBUG LOW not part of finished code
  }
  do {
    // switch on output / triac if we have waited long enough
    if (loop_number == channel_value_1)
      WRITE_PERI_REG(PERIPHS_GPIO_BASEADDR + 8, 0x1000); // set output low / on
    if (loop_number == channel_value_2)
      WRITE_PERI_REG(PERIPHS_GPIO_BASEADDR + 8, 0x2000); // set output low / on
    if (loop_number == channel_value_3)
      WRITE_PERI_REG(PERIPHS_GPIO_BASEADDR + 8, 0x4000); // set output low / on
    if (loop_number == channel_value_4)
 //     WRITE_PERI_REG(PERIPHS_GPIO_BASEADDR + 9, 0x0001); // set output low / on
   digitalWrite(output_4, LOW); // set output low / on (haven't found the register for GPIO16)

    // wait untill it's time to loop & set the next outputs if required
    step_ends += step_delay; // add delay time to last end time to get new end time
    while (micros() < step_ends) { // check time now against end time & loop
      delay(0); // the magic delay - frees the processor to do some quick housekeeping, WiFi & stack stuff
    }
    loop_number--; // reduce loop counter by 1
  } while (loop_number > 0); // 'do' it all again unless ==0
 
  WRITE_PERI_REG(PERIPHS_GPIO_BASEADDR + 4, 0xF000); // re-sets all outputs high as we are close to zero cross
  digitalWrite(output_4, HIGH); // apart from this one
  loop_number = 255; // re-set the value for loop counter ready for the next run
  WRITE_PERI_REG(PERIPHS_GPIO_BASEADDR + 4, 0x8000); //DEBUG HIGH not part of finished code
}