Required Hardware

• 433Mhz RF switch and relay set
• ESP32C4FN Super Mini
• 2N3904 transistor (2pcs)
• NEC2561 optocouple (2pcs)
• Push button
• 1K resistor (4 pcs)
• 10K resistor (3 pcs)
• 150 resistor
• 330 resistor
• External 5V power supply

Required Arduino Libraries

• esp32 by Espressif Systems (board) 3.3.3
• HomeSpan 2.1.6

Arduino IDE Settings

• Board: ESP32C3 Dev BModule
• ESP CDC On Boot: Enabled
• CPU Frequency: 80MHz (WiFi)
• Core Debug Level: None
• Erase All Flash Before Sketch Upload: Disabled
• Flash frequency: 80Mhz
• Flash Mode: QIO
• Flash Size: 4MB (32Mb)
• JTAG Adapter: Disabled
• Partition Scheme: Huge APP (3MB No OTA/1MB SPIFFS)
• Upload Speed: 921600
• Zigbee Mode: Disabled
• Programmer: Esptool

This repository contains firmware for the HomeKit device described in this video.
Article about RF Switch.

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