My On Zoom weekend project

command.sh

#!/bin/bash

# Replace with your D1 IP (see it in serial monitor when the devboard starts up)
url=http://192.168.179.146/LED

while :
do
  if xwininfo -tree -root | grep "Zoom Meeting" &> /dev/null
  then
    curl -d color=red $url
  else
    curl -d color=green $url
  fi
  sleep 1
done

main.cpp

#include <Arduino.h>
#include <ESP8266WiFi.h>
#include <WiFiClient.h>
#include <ESP8266WiFiMulti.h> 
#include <ESP8266mDNS.h>
#include <ESP8266WebServer.h>

ESP8266WiFiMulti wifiMulti;     // Create an instance of the ESP8266WiFiMulti class, called 'wifiMulti'

ESP8266WebServer server(80);    // Create a webserver object that listens for HTTP request on port 80

int RED = D5;
int GREEN = D6;

void handleRoot();
void handleLED();
void handleNotFound();

void setup(void){
  Serial.begin(115200);
  delay(10);
  Serial.println('\n');

  pinMode(RED, OUTPUT); // Make RED pin D5 an output pin
  pinMode(GREEN, OUTPUT); // Make GREEN pin D6 an output pin

  digitalWrite(GREEN, true);

  wifiMulti.addAP("SSID", "PASSWORD");   // add Wi-Fi networks you want to connect to

  Serial.println("Connecting ...");
  while (wifiMulti.run() != WL_CONNECTED) { // Wait for the Wi-Fi to connect: scan for Wi-Fi networks, and connect to the strongest of the networks above
    delay(250);
    Serial.print('.');
  }
  Serial.println('\n');
  Serial.print("Connected to ");
  Serial.println(WiFi.SSID());
  Serial.print("IP address:\t");
  Serial.println(WiFi.localIP());

  if (MDNS.begin("esp8266")) {
    Serial.println("mDNS responder started");
  } else {
    Serial.println("Error setting up MDNS responder!");
  }

  server.on("/", HTTP_GET, handleRoot);     // Call the 'handleRoot' function when a client requests URI "/"
  server.on("/LED", HTTP_POST, handleLED);  // Call the 'handleLED' function when a POST request is made to URI "/LED"
  server.onNotFound(handleNotFound);

  server.begin();
  Serial.println("HTTP server started");
}

void loop(void){
  server.handleClient();
}

void handleRoot() {
  server.send(200, "text/html", "<form action=\"/LED\" method=\"POST\"><input type=\"submit\" name='color' value=\"red\"><input type=\"submit\" name='color' value=\"green\"></form>");
}

void handleLED() {
  String color = server.arg(0);
  String red = "red";

  if (color == red) {
    digitalWrite(GREEN, false);
    digitalWrite(RED, true);
  } else {
    digitalWrite(RED, false);
    digitalWrite(GREEN, true);
  }
  server.sendHeader("Location","/");
  server.send(303);
}

void handleNotFound(){
  server.send(404, "text/plain", "404: Not found"); // Send HTTP status 404 (Not Found) when there's no handler for the URI in the request
}

on-zoom-call-parts-and-info.md

My On Zoom call weekend project

https://twitter.com/benjaminwood/status/1259242096965193728?s=20

I'm running zoom on Linux (Ubuntu 20.04); command.sh and on-zoom-call.service is Linux specific. Happy to chat/think about how this could be done on macOS. As for main.cpp, go easy on me, I don't know C++ well.

Parts

Wemos D1 mini Cheap from China: https://www.aliexpress.com/item/32651747570.html I bought a 5 pack on Amazon: https://www.amazon.com/gp/product/B076F52NQD/ref=ppx_yo_dt_b_asin_title_o03_s00?ie=UTF8&psc=1

Dual color LED module I only used this becuase I had it sitting around as part of kit I got a couple years ago. https://www.sunfounder.com/dual-color-led-module.html

USB charger from an old iPad

on-zoom-call.service

# Lives at /etc/systemd/user/on-zoom-call.service

[Unit]
Description=On Zomm Call
After=network.target
StartLimitIntervalSec=0

[Service]
Type=simple
Restart=always
RestartSec=1
ExecStart=/bin/bash -c "/home/ben/Documents/PlatformIO/Projects/On\ Call/command"

[Install]
WantedBy=multi-user.target