ESP32-WROOM-32D - Espressif- and MAX30102 High-Sensitivity Pulse Oximeter and Heart-Rate Sensor Product Pin Configuration MAX30102 How It Works How It Works! Connectivity ◯ ESP32 + MAX30102 ⇨ ◯ MQTT ⇨ ◯ Node Server + SocketIO ⇨ ◯ Browser ThingSpeak spO2 plot. https://thingspeak.com/channels/1229902
