物联网（ IoT ，Internet of things ）即“万物相连的互联网”，是互联网基础上的延伸和扩展的网络，利用信息传感设备与互联网结合起来，实现在任何时间、任何地点，人、机、物的互联互通。
此次蘑菇云带领大家上手体验物联网，来一场干货满满的IoT培训。在此次培训活动中，嵌入式工程师彭雪作为指导，带领各位学员们亲手体验物联网项目完成手机App远程控制设备，快速熟悉使用ESP32和阿里云平台的开发流程，活动最后，学员们掌握利用互联网搭建简单项目，收获关于物联网的丰富信息。
[ DB ] CONNECT:[ UseTime:0.004606s ] pgsql:dbname=cnpwd;host=127.0.0.1;port=5432
[ SQL ] select fields_name as "field",fields_type as "type",fields_not_null as "null",fields_key_name as "key",fields_default as "default",fields_default as "extra" from table_msg('yf_photos'); [ RunTime:0.082603s ]
[ SQL ] SELECT * FROM yf_photos WHERE id = 2678 AND status = 4 LIMIT 1 [ RunTime:0.007733s ]
[ SQL ] select fields_name as "field",fields_type as "type",fields_not_null as "null",fields_key_name as "key",fields_default as "default",fields_default as "extra" from table_msg('yf_collect'); [ RunTime:0.013043s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM yf_collect WHERE user_id IS NULL AND goods_id = 2678 AND kind = 4 LIMIT 1 [ RunTime:0.004349s ]
[ SQL ] UPDATE yf_photos SET count_click=count_click+1 WHERE id = 2678 AND status = 4 [ RunTime:0.007016s ]
[ SQL ] select fields_name as "field",fields_type as "type",fields_not_null as "null",fields_key_name as "key",fields_default as "default",fields_default as "extra" from table_msg('yf_user_info'); [ RunTime:0.021162s ]
[ SQL ] SELECT * FROM yf_user_info WHERE user_id = 471 AND kind = 1 LIMIT 1 [ RunTime:0.005054s ]
[ SQL ] select fields_name as "field",fields_type as "type",fields_not_null as "null",fields_key_name as "key",fields_default as "default",fields_default as "extra" from table_msg('yf_venue'); [ RunTime:0.051907s ]
[ SQL ] SELECT * FROM yf_venue WHERE user_id = 471 AND status = 5 AND start_time <= 1768356620 AND end_time >= 1768356620 ORDER BY recommend DESC,istop DESC,count_click DESC,id DESC LIMIT 1 [ RunTime:0.003951s ]
[ SQL ] SELECT a.*,b.name as user_name,b.avatar as user_avatar FROM yf_photos a LEFT JOIN yf_user_info b ON b.user_id=a.user_id AND b.kind = a.kind WHERE a.id <> 2678 AND a.kind_pid = 4 AND a.city = 19 AND a.status = 4 ORDER BY a.istop DESC,a.count_click DESC,a.id DESC LIMIT 6 [ RunTime:0.017995s ]
[ SQL ] select fields_name as "field",fields_type as "type",fields_not_null as "null",fields_key_name as "key",fields_default as "default",fields_default as "extra" from table_msg('yf_tag_list'); [ RunTime:0.007542s ]
[ SQL ] SELECT tag_id, MAX(tag_name) as tag_name, MAX(kind) as kind FROM yf_tag_list WHERE kind = 4 GROUP BY tag_id LIMIT 80 [ RunTime:0.009137s ]
[ SQL ] SELECT * FROM yf_tag_list WHERE detail_id = 1269 AND kind = 4 [ RunTime:0.004154s ]
[ SQL ] SELECT * FROM yf_tag_list WHERE detail_id = 1249 AND kind = 4 [ RunTime:0.003156s ]
[ SQL ] SELECT * FROM yf_tag_list WHERE detail_id = 1245 AND kind = 4 [ RunTime:0.003649s ]
[ SQL ] SELECT * FROM yf_tag_list WHERE detail_id = 4628 AND kind = 4 [ RunTime:0.002826s ]
[ SQL ] SELECT * FROM yf_tag_list WHERE detail_id = 4904 AND kind = 4 [ RunTime:0.003724s ]
[ SQL ] SELECT * FROM yf_tag_list WHERE detail_id = 299 AND kind = 4 [ RunTime:0.001737s ]
