tally light for atem switcher using esp8266

tally_light.ino

/*****************
  Tally light ESP8266 for Blackmagic ATEM switcher
  https://forum.livevideotech.today/t/wifi-tally-for-atem-mini-on-the-cheap/760/9

  Version 1.5

  A wireless (WiFi) tally light for Blackmagic Design
  ATEM video switchers, based on the Wemos D1 Mini ESP8266 development
  board with WS2812B RGB Shield and the Arduino IDE.

  Based on the work of Kasper Skårhøj:
  https://github.com/kasperskaarhoj/SKAARHOJ-Open-Engineering
  and OneGuyOneBlog
  https://oneguyoneblog.com/2020/06/13/tally-light-esp32-for-blackmagic-atem-switcher/

******************/
//library for Wifi
#include <ESP8266WiFi.h>

//libraries for ATEM              https://github.com/kasperskaarhoj/SKAARHOJ-Open-Engineering
#include <SkaarhojPgmspace.h>
#include <ATEMbase.h>
#include <ATEMstd.h>

//library for RGB Shield.
#include <Adafruit_NeoPixel.h>    //https://github.com/adafruit/Adafruit_NeoPixel

//---  YOU WILL WANT TO CHANGE THESE SIX VARIABLES ---

const char* ssid = "YOUR SSID";               // The wifi network you would like to connect to
const char* password =  "**********";         // Password of the wifi network
int led_brightness = 25;                      // Percentage of LED brightness
int cameraNumber = 1;                         // Camera Input number on your ATEM Switcher
IPAddress clientIp(192, 168, 1, 202);         // IP address of the ESP8266
IPAddress switcherIp(192, 168, 1, 200);       // IP address of the ATEM switcher

//--- Nothing beyond this point needs changing unless you want to develop the code. ---

ATEMstd AtemSwitcher;

#define PIN 4
#define LED_NUM 7

int PreviewTallyPrevious = 1;
int ProgramTallyPrevious = 1;

Adafruit_NeoPixel leds = Adafruit_NeoPixel(LED_NUM, PIN, NEO_GRB + NEO_KHZ800);

void setup() {

  leds.begin(); // This initializes the NeoPixel library.

  Serial.begin(115200);
  Serial.println("Serial is up");

// Start the Ethernet, Serial (debugging) and UDP:
  WiFi.begin(ssid, password);

  while (WiFi.status() != WL_CONNECTED) {
    led_set(0, 0, led_brightness);//blue
    delay(500);
    Serial.println("Connecting to WiFi.."); 
  }
  Serial.println("Connected to the WiFi network");
  led_set(led_brightness, led_brightness, led_brightness);//white

  // Initialize a connection to the switcher:
  AtemSwitcher.begin(switcherIp);

  
  AtemSwitcher.serialOutput(true);
  AtemSwitcher.connect();

}

void led_set(uint8 R, uint8 G, uint8 B) {
  for (int i = 0; i < LED_NUM; i++) {
    leds.setPixelColor(i, leds.Color(R, G, B));
    leds.show();
  }
}

void loop() {
  // Check for packets, respond to them etc. Keeping the connection alive!
  AtemSwitcher.runLoop();

  int ProgramTally = AtemSwitcher.getProgramTally(cameraNumber);
  int PreviewTally = AtemSwitcher.getPreviewTally(cameraNumber);

  if ((ProgramTallyPrevious != ProgramTally) || (PreviewTallyPrevious != PreviewTally)) { // changed?

    if ((ProgramTally && !PreviewTally) || (ProgramTally && PreviewTally) ) { // only program, or program AND preview
      led_set(led_brightness, 0, 0);//red
    } else if (PreviewTally && !ProgramTally) { // only preview
      led_set(0, led_brightness, 0);//green
    } else if (!PreviewTally || !ProgramTally) { // neither
      led_set(0, 0, 0);//off
    }

  }

  ProgramTallyPrevious = ProgramTally;
  PreviewTallyPrevious = PreviewTally;
}