#define NUM_LEDS 114 #define WIFI_SSID wifi_ssid #define WIFI_PASS password #define MQTT_BROKER mqtt_url #define MQTT_USERNAME mqtt_username #define MQTT_PASSWORD ...
A consumer scans an Alipay QR code to pay for the order at a self-service restaurant in Hangzhou, Zhejiang province. [Photo/Xinhua] The first China-led international standard for QR codes was ...
(1) Prolonged exposure for 60 hours at humidity > 80% can lead to a temporary drift of the signal +3%. Sensor slowly returns to the calibrated state at normal operating conditions. (2) High frequency ...
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