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Things used in this project × 2 ERM vibration motor (coin type, 3V) × 1 NeoPixel LED strip, WS2812B, 7 LEDs × 1 × 1 × 2 × 2 × 1 Arduino IDE Libraries: Adafruit NeoPixel library, Grove Ultrasonic Ranger library (Seeed Studio) Public spaces are increasingly optimised for movement efficiency. You move through them quickly, quietly, without touching anything or anyone you did not intend to. The body in transit is a managed body.

RocketMQ系列文章 RocketMQ(一)：基本概念和环境搭建 RocketMQ(二)：原生API快速入门 一、RocketMQ快速入门 pom.xml <dependency> <groupId>org.apache.rocketmq</groupId> <artifactId>rocketmq-client</artifactId> <version>4.9.2</version> </dependency> @Test public void simpleProducer() throws Exception { DefaultMQProducer producer = new DefaultMQProducer("test-producer-group"); producer.setNamesrvAddr("localhost:9876"); producer.start(); Message message = new Message("testTopic", "我是一个简单的消息".getBytes()); SendResult sendResult =...

Things used in this project × 1 × 1 × 1 Raspberry Pi High Quality Camera × 1 × 1 × 1 GoPro Shorty Mini Extension Pole + Tripod × 1 × 1 × 1 A 50-year-old bridge collapsed in Pittsburgh (Pennsylvania) on January 28, 2022. There is only one reason why a sturdy structure such as a concrete bridge could suddenly collapse: wear and tear. Concrete structures generally start deteriorating after about 40 to 50 years.