Quantity   Component name
1 × M5Stack Atom Lite ESP32 https://shop.m5stack.com/products/atom-lite-esp32-development-kit
1 × M5Stack Mini 3A Relay Unit https://shop.m5stack.com/products/mini-3a-relay-unit
1 × M5Stack ATOMIC RS485 Base TTL-RS485 Converter https://shop.m5stack.com/products/atomic-rs485-base