{"id":1552,"date":"2026-04-09T21:59:53","date_gmt":"2026-04-09T13:59:53","guid":{"rendered":"https:\/\/mayaharper.showcasingme.net\/vn\/timing-vs-sequence-diagrams-iot-developers\/"},"modified":"2026-04-09T21:59:53","modified_gmt":"2026-04-09T13:59:53","slug":"timing-vs-sequence-diagrams-iot-developers","status":"publish","type":"post","link":"https:\/\/mayaharper.showcasingme.net\/vn\/timing-vs-sequence-diagrams-iot-developers\/","title":{"rendered":"So s\u00e1nh r\u00f5 r\u00e0ng: S\u01a1 \u0111\u1ed3 Th\u1eddi gian so v\u1edbi S\u01a1 \u0111\u1ed3 Th\u1ee9 t\u1ef1 d\u00e0nh cho Nh\u00e0 ph\u00e1t tri\u1ec3n IoT"},"content":{"rendered":"

Ecosysytem Internet of Things (IoT) \u0111\u01b0\u1ee3c \u0111\u1eb7c tr\u01b0ng b\u1edfi \u0111\u1ed9 ph\u1ee9c t\u1ea1p. Kh\u00f4ng ch\u1ec9 \u0111\u01a1n thu\u1ea7n l\u00e0 k\u1ebft n\u1ed1i c\u00e1c thi\u1ebft b\u1ecb; m\u00e0 c\u00f2n l\u00e0 vi\u1ec7c ph\u1ed1i h\u1ee3p c\u00e1c t\u01b0\u01a1ng t\u00e1c qua c\u00e1c m\u1ea1ng kh\u00f4ng \u0111\u1ed3ng nh\u1ea5t, ph\u1ea7n c\u1ee9ng b\u1ecb gi\u1edbi h\u1ea1n v\u00e0 c\u00e1c y\u00eau c\u1ea7u v\u1ec1 th\u1eddi gian nghi\u00eam ng\u1eb7t. \u0110\u1ed1i v\u1edbi c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng nh\u00fang, vi\u1ec7c l\u1ef1a ch\u1ecdn c\u00f4ng c\u1ee5 tr\u1ef1c quan h\u00f3a ph\u00f9 h\u1ee3p l\u00e0 \u0111i\u1ec1u then ch\u1ed1t. Hai k\u1ef9 thu\u1eadt m\u00f4 h\u00ecnh h\u00f3a ph\u1ed5 bi\u1ebfn nh\u1ea5t trong Ng\u00f4n ng\u1eef M\u00f4 h\u00ecnh h\u00f3a \u0110\u01a1n nh\u1ea5t (UML) l\u00e0 S\u01a1 \u0111\u1ed3 Th\u1ee9 t\u1ef1 v\u00e0 S\u01a1 \u0111\u1ed3 Th\u1eddi gian. M\u1eb7c d\u00f9 ch\u00fang th\u01b0\u1eddng xu\u1ea5t hi\u1ec7n c\u00f9ng nhau trong t\u00e0i li\u1ec7u, nh\u01b0ng ch\u00fang ph\u1ee5c v\u1ee5 c\u00e1c m\u1ee5c \u0111\u00edch kh\u00e1c nhau. Hi\u1ec3u r\u00f5 khi n\u00e0o n\u00ean s\u1eed d\u1ee5ng t\u1eebng lo\u1ea1i s\u1ebd gi\u00fap tr\u00e1nh \u0111\u01b0\u1ee3c nh\u1eefng l\u1ed7i ki\u1ebfn tr\u00fac trong c\u00e1c \u1ee9ng d\u1ee5ng nh\u1ea1y c\u1ea3m v\u1edbi \u0111\u1ed9 tr\u1ec5.<\/p>\n

H\u01b0\u1edbng d\u1eabn n\u00e0y kh\u00e1m ph\u00e1 nh\u1eefng \u0111i\u1ec3m kh\u00e1c bi\u1ec7t tinh t\u1ebf gi\u1eefa hai lo\u1ea1i s\u01a1 \u0111\u1ed3 n\u00e0y. N\u00f3 \u0111i s\u00e2u v\u00e0o s\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 c\u1ea5u tr\u00fac, \u1ee9ng d\u1ee5ng trong b\u1ed1i c\u1ea3nh IoT, v\u00e0 c\u00e1c t\u00ecnh hu\u1ed1ng c\u1ee5 th\u1ec3 m\u00e0 \u0111\u1ed9 ch\u00ednh x\u00e1c v\u1ec1 th\u1eddi gian v\u01b0\u1ee3t tr\u1ed9i h\u01a1n lu\u1ed3ng logic.<\/p>\n

\"Kawaii-style<\/figure>\n

Hi\u1ec3u r\u00f5 S\u01a1 \u0111\u1ed3 Th\u1ee9 t\u1ef1 trong H\u1ec7 th\u1ed1ng Nh\u00fang \ud83d\udccb<\/h2>\n

S\u01a1 \u0111\u1ed3 Th\u1ee9 t\u1ef1 ch\u1ee7 y\u1ebfu quan t\u00e2m \u0111\u1ebfn th\u1ee9 t\u1ef1<\/strong>c\u1ee7a c\u00e1c t\u01b0\u01a1ng t\u00e1c. N\u00f3 m\u00f4 t\u1ea3 c\u00e1ch c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng, th\u00e0nh ph\u1ea7n ho\u1eb7c h\u1ec7 th\u1ed1ng con giao ti\u1ebfp theo th\u1eddi gian, nh\u01b0ng kh\u00f4ng c\u00f3 r\u00e0ng bu\u1ed9c th\u1eddi gian nghi\u00eam ng\u1eb7t. Trong b\u1ed1i c\u1ea3nh IoT, \u0111i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 \u0111\u1ea1i di\u1ec7n cho m\u1ed9t c\u1ea3m bi\u1ebfn g\u1eedi d\u1eef li\u1ec7u \u0111\u1ebfn m\u1ed9t c\u1ed5ng k\u1ebft n\u1ed1i, sau \u0111\u00f3 chuy\u1ec3n ti\u1ebfp d\u1eef li\u1ec7u \u0111\u1ebfn m\u00e1y ch\u1ee7 \u0111\u00e1m m\u00e2y.<\/p>\n

\u0110\u1eb7c \u0111i\u1ec3m ch\u00ednh<\/h3>\n
    \n
  • T\u1eadp trung v\u00e0o Logic:<\/strong> N\u00f3 tr\u1ea3 l\u1eddi c\u00e2u h\u1ecfi, \u201cVi\u1ec7c g\u00ec x\u1ea3y ra ti\u1ebfp theo?\u201d thay v\u00ec \u201cCh\u00ednh x\u00e1c khi n\u00e0o th\u00ec n\u00f3 x\u1ea3y ra?\u201d<\/li>\n
  • Tr\u1ee5c th\u1eddi gian th\u1eb3ng \u0111\u1ee9ng:<\/strong> Th\u1eddi gian ch\u1ea3y t\u1eeb tr\u00ean xu\u1ed1ng d\u01b0\u1edbi, nh\u01b0ng kho\u1ea3ng c\u00e1ch gi\u1eefa c\u00e1c tin nh\u1eafn kh\u00f4ng nh\u1ea5t thi\u1ebft t\u01b0\u01a1ng \u1ee9ng v\u1edbi \u0111\u01a1n v\u1ecb th\u1eddi gian th\u1ef1c t\u1ebf.<\/li>\n
  • Tin nh\u1eafn:<\/strong> \u0110\u01b0\u1ee3c bi\u1ec3u di\u1ec5n b\u1eb1ng c\u00e1c m\u0169i t\u00ean ch\u1ec9 ra y\u00eau c\u1ea7u, ph\u1ea3n h\u1ed3i ho\u1eb7c truy\u1ec1n t\u00edn hi\u1ec7u.<\/li>\n
  • Thanh K\u00edch ho\u1ea1t:<\/strong> Hi\u1ec3n th\u1ecb khi m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng \u0111ang ho\u1ea1t \u0111\u1ed9ng ho\u1eb7c x\u1eed l\u00fd m\u1ed9t nhi\u1ec7m v\u1ee5.<\/li>\n<\/ul>\n

    C\u00e1c tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng IoT ti\u00eau bi\u1ec3u<\/h3>\n

    S\u01a1 \u0111\u1ed3 Th\u1ee9 t\u1ef1 l\u00fd t\u01b0\u1edfng \u0111\u1ec3 ghi ch\u00e9p lu\u1ed3ng giao th\u1ee9c c\u1ea5p cao, n\u01a1i \u0111\u1ed9 ch\u00ednh x\u00e1c v\u1ec1 mili gi\u00e2y kh\u00f4ng quan tr\u1ecdng b\u1eb1ng vi\u1ec7c c\u00f3 t\u1ed3n t\u1ea1i m\u1ed9t thao t\u00e1c trao \u0111\u1ed5i t\u00edn hi\u1ec7u.<\/p>\n

      \n
    • C\u00e1c thao t\u00e1c trao \u0111\u1ed5i x\u00e1c th\u1ef1c:<\/strong> X\u00e1c minh th\u00f4ng tin x\u00e1c th\u1ef1c gi\u1eefa m\u1ed9t thi\u1ebft b\u1ecb v\u00e0 m\u1ed9t m\u00e1y ch\u1ee7 trung gian.<\/li>\n
    • Chuy\u1ec3n \u0111\u1ed5i tr\u1ea1ng th\u00e1i:<\/strong> Chuy\u1ec3n m\u1ed9t thi\u1ebft b\u1ecb t\u1eeb ch\u1ebf \u0111\u1ed9 \u201cng\u1ee7\u201d sang ch\u1ebf \u0111\u1ed9 \u201cho\u1ea1t \u0111\u1ed9ng\u201d th\u00f4ng qua m\u1ed9t t\u00edn hi\u1ec7u l\u1ec7nh.<\/li>\n
    • T\u01b0\u01a1ng t\u00e1c API:<\/strong> X\u00e1c \u0111\u1ecbnh th\u1ee9 t\u1ef1 c\u00e1c l\u1eddi g\u1ecdi RESTful m\u00e0 m\u1ed9t m\u00f4-\u0111un ph\u1ea7n m\u1ec1m c\u00e0i \u0111\u1eb7t th\u1ef1c hi\u1ec7n \u0111\u1ec3 c\u1eadp nh\u1eadt c\u1ea5u h\u00ecnh.<\/li>\n<\/ul>\n

      Khi m\u00f4 h\u00ecnh h\u00f3a quy tr\u00ecnh \u0111\u0103ng k\u00fd thi\u1ebft b\u1ecb, s\u01a1 \u0111\u1ed3 th\u1ee9 t\u1ef1 \u0111\u1ea3m b\u1ea3o r\u1eb1ng thi\u1ebft b\u1ecb g\u1eedi ID c\u1ee7a m\u00ecnh, nh\u1eadn \u0111\u01b0\u1ee3c m\u1ed9t m\u00e3 th\u00f4ng b\u00e1o, r\u1ed3i x\u00e1c nh\u1eadn vi\u1ec7c nh\u1eadn \u0111\u01b0\u1ee3c. N\u1ebfu th\u1ee9 t\u1ef1 sai, h\u1ec7 th\u1ed1ng s\u1ebd th\u1ea5t b\u1ea1i. Tuy nhi\u00ean, s\u01a1 \u0111\u1ed3 n\u00e0y kh\u00f4ng n\u00eau r\u00f5 r\u00e0ng r\u1eb1ng m\u00e3 th\u00f4ng b\u00e1o ph\u1ea3i \u0111\u01b0\u1ee3c nh\u1eadn trong v\u00f2ng 50 mili gi\u00e2y \u0111\u1ec3 v\u1eabn c\u00f2n hi\u1ec7u l\u1ef1c.<\/p>\n

      Vai tr\u00f2 c\u1ee7a S\u01a1 \u0111\u1ed3 Th\u1eddi gian trong H\u1ec7 th\u1ed1ng Th\u1eddi gian Th\u1ef1c \u23f1\ufe0f<\/h2>\n

      S\u01a1 \u0111\u1ed3 Th\u1eddi gian, th\u01b0\u1eddng \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 S\u01a1 \u0111\u1ed3 R\u00e0ng bu\u1ed9c Th\u1eddi gian, chuy\u00ean d\u00f9ng cho c\u00e1c t\u00ecnh hu\u1ed1ng m\u00e0 th\u1eddi gian l\u00e0 bi\u1ebfn quan tr\u1ecdng. Trong IoT, n\u01a1i tu\u1ed5i th\u1ecd pin, \u0111\u1ed9 tr\u1ec5 m\u1ea1ng v\u00e0 t\u1ed1c \u0111\u1ed9 l\u1ea5y m\u1eabu c\u1ea3m bi\u1ebfn quy\u1ebft \u0111\u1ecbnh ch\u1ee9c n\u0103ng, th\u1eddi gian th\u01b0\u1eddng l\u00e0 y\u1ebfu t\u1ed1 ph\u00e2n bi\u1ec7t gi\u1eefa th\u00e0nh c\u00f4ng v\u00e0 th\u1ea5t b\u1ea1i.<\/p>\n

      \u0110\u1eb7c \u0111i\u1ec3m ch\u00ednh<\/h3>\n
        \n
      • Tr\u1ee5c th\u1eddi gian n\u1eb1m ngang:<\/strong> Th\u1eddi gian ch\u1ea3y t\u1eeb tr\u00e1i sang ph\u1ea3i, cho ph\u00e9p \u0111o l\u01b0\u1eddng ch\u00ednh x\u00e1c c\u00e1c kho\u1ea3ng th\u1eddi gian.<\/li>\n
      • C\u00e1c thay \u0111\u1ed5i tr\u1ea1ng th\u00e1i:<\/strong> T\u1eadp trung v\u00e0o tr\u1ea1ng th\u00e1i c\u1ee7a m\u1ed9t \u0111\u01b0\u1eddng s\u1ed1ng (v\u00ed d\u1ee5: tr\u1ea1ng th\u00e1i ch\u00e2n, n\u1ed9i dung b\u1ed9 \u0111\u1ec7m ho\u1eb7c tr\u1ea1ng th\u00e1i lu\u1ed3ng) theo th\u1eddi gian.<\/li>\n
      • C\u00e1c r\u00e0ng bu\u1ed9c:<\/strong> C\u00f3 th\u1ec3 \u0111\u1ecbnh ngh\u0129a c\u00e1c th\u1eddi h\u1ea1n nghi\u00eam ng\u1eb7t, ch\u1eb3ng h\u1ea1n nh\u01b0 \u201cPh\u1ea3n h\u1ed3i ph\u1ea3i x\u1ea3y ra trong v\u00f2ng 10ms\u201d.<\/li>\n
      • S\u1ef1 ki\u1ec7n:<\/strong> Ghi d\u1ea5u c\u00e1c s\u1ef1 ki\u1ec7n c\u1ee5 th\u1ec3 nh\u01b0 ng\u1eaft x\u1ea3y ra ho\u1eb7c g\u00f3i tin \u0111\u1ebfn.<\/li>\n<\/ul>\n

        C\u00e1c tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng \u0111i\u1ec3n h\u00ecnh c\u1ee7a IoT<\/h3>\n

        S\u01a1 \u0111\u1ed3 th\u1eddi gian tr\u1edf n\u00ean thi\u1ebft y\u1ebfu khi ki\u1ebfn tr\u00fac ph\u1ee5 thu\u1ed9c v\u00e0o c\u00e1c y\u00eau c\u1ea7u th\u1eddi gian th\u1ef1c c\u1ee9ng ho\u1eb7c c\u00e1c chi\u1ebfn l\u01b0\u1ee3c qu\u1ea3n l\u00fd n\u0103ng l\u01b0\u1ee3ng.<\/p>\n

          \n
        • \u0110\u1ed9 tr\u1ec5 ng\u1eaft:<\/strong>Tr\u1ef1c quan h\u00f3a kho\u1ea3ng th\u1eddi gian t\u1eeb m\u1ed9t t\u00edn hi\u1ec7u v\u1eadt l\u00fd (v\u00ed d\u1ee5 nh\u01b0 nh\u1ea5n n\u00fat) \u0111\u1ebfn khi CPU x\u1eed l\u00fd tr\u00ecnh d\u1ecbch v\u1ee5 ng\u1eaft.<\/li>\n
        • V\u00f2ng l\u1eb7p ngu\u1ed3n:<\/strong>X\u00e1c \u0111\u1ecbnh th\u1eddi gian thi\u1ebft b\u1ecb \u1edf ch\u1ebf \u0111\u1ed9 ng\u1ee7 so v\u1edbi truy\u1ec1n ho\u1ea1t \u0111\u1ed9ng \u0111\u1ec3 t\u00ednh to\u00e1n m\u1ee9c ti\u00eau hao pin.<\/li>\n
        • Th\u1ee7 t\u1ee5c thi\u1ebft l\u1eadp k\u1ebft n\u1ed1i giao th\u1ee9c:<\/strong>X\u00e1c \u0111\u1ecbnh c\u00e1c kho\u1ea3ng th\u1eddi gian h\u1ebft h\u1ea1n cho vi\u1ec7c truy\u1ec1n l\u1ea1i c\u1ee7a CoAP ho\u1eb7c MQTT.<\/li>\n
        • \u0110\u1ed3ng b\u1ed9 h\u00f3a:<\/strong>\u0110\u1ea3m b\u1ea3o nhi\u1ec1u c\u1ea3m bi\u1ebfn thu th\u1eadp d\u1eef li\u1ec7u \u0111\u1ed3ng th\u1eddi \u0111\u1ec3 t\u1ed5ng h\u1ee3p ch\u00ednh x\u00e1c.<\/li>\n<\/ul>\n

          X\u00e9t m\u1ed9t h\u1ec7 th\u1ed1ng gi\u00e1m s\u00e1t nhi\u1ec7t \u0111\u1ed9. S\u01a1 \u0111\u1ed3 th\u1ee9 t\u1ef1 cho th\u1ea5y c\u1ea3m bi\u1ebfn \u0111\u1ecdc v\u00e0 g\u1eedi d\u1eef li\u1ec7u. S\u01a1 \u0111\u1ed3 th\u1eddi gian cho th\u1ea5y thao t\u00e1c \u0111\u1ecdc m\u1ea5t 5ms, truy\u1ec1n m\u1ea5t 20ms, v\u00e0 thi\u1ebft b\u1ecb ph\u1ea3i tr\u1edf v\u1ec1 ch\u1ebf \u0111\u1ed9 ng\u1ee7 tr\u01b0\u1edbc khi kho\u1ea3ng th\u1eddi gian 100ms k\u1ebft th\u00fac \u0111\u1ec3 ti\u1ebft ki\u1ec7m n\u0103ng l\u01b0\u1ee3ng.<\/p>\n

          So s\u00e1nh song song \ud83d\udcca<\/h2>\n

          \u0110\u1ec3 l\u00e0m r\u00f5 s\u1ef1 kh\u00e1c bi\u1ec7t, ch\u00fang ta c\u00f3 th\u1ec3 xem x\u00e9t c\u00e1c kh\u00e1c bi\u1ec7t v\u1ec1 c\u1ea5u tr\u00fac v\u00e0 ch\u1ee9c n\u0103ng gi\u1eefa hai k\u1ef9 thu\u1eadt m\u00f4 h\u00ecnh h\u00f3a n\u00e0y.<\/p>\n\n\n\n\n\n\n\n\n\n\n
          T\u00ednh n\u0103ng<\/th>\nS\u01a1 \u0111\u1ed3 th\u1ee9 t\u1ef1<\/th>\nS\u01a1 \u0111\u1ed3 th\u1eddi gian<\/th>\n<\/tr>\n<\/thead>\n
          Tr\u1ecdng t\u00e2m ch\u00ednh<\/strong><\/td>\nTh\u1ee9 t\u1ef1 tin nh\u1eafn v\u00e0 lu\u1ed3ng logic<\/td>\nKho\u1ea3ng th\u1eddi gian v\u00e0 c\u00e1c thay \u0111\u1ed5i tr\u1ea1ng th\u00e1i<\/td>\n<\/tr>\n
          Bi\u1ec3u di\u1ec5n th\u1eddi gian<\/strong><\/td>\nTr\u1eebu t\u01b0\u1ee3ng (ch\u1ec9 d\u00f2ng d\u1ecdc)<\/td>\nC\u1ee5 th\u1ec3 (thang \u0111o ngang)<\/td>\n<\/tr>\n
          C\u00e2u h\u1ecfi ch\u00ednh<\/strong><\/td>\nChu\u1ed7i s\u1ef1 ki\u1ec7n l\u00e0 g\u00ec?<\/td>\nM\u1ed7i s\u1ef1 ki\u1ec7n m\u1ea5t bao l\u00e2u?<\/td>\n<\/tr>\n
          \u1ee8ng d\u1ee5ng IoT<\/strong><\/td>\nLogic giao th\u1ee9c, l\u1eddi g\u1ecdi API<\/td>\n\u0110\u1ed9 tr\u1ec5, ti\u00eau th\u1ee5 n\u0103ng l\u01b0\u1ee3ng, ng\u1eaft<\/td>\n<\/tr>\n
          \u0110\u1ed9 ph\u1ee9c t\u1ea1p<\/strong><\/td>\nCao (nhi\u1ec1u \u0111\u1ed1i t\u01b0\u1ee3ng)<\/td>\nCao (nhi\u1ec1u r\u00e0ng bu\u1ed9c th\u1eddi gian)<\/td>\n<\/tr>\n
          T\u1ed1t nh\u1ea5t cho<\/strong><\/td>\nKi\u1ebfn tr\u00fac ph\u1ea7n m\u1ec1m, x\u00e1c minh logic<\/td>\nK\u1ef9 thu\u1eadt ph\u1ea7n m\u1ec1m nh\u00fang, t\u00edch h\u1ee3p ph\u1ea7n c\u1ee9ng<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

          T\u1ea1i sao th\u1eddi gian l\u1ea1i quan tr\u1ecdng trong ki\u1ebfn tr\u00fac IoT \ud83c\udf10<\/h2>\n

          Trong ph\u00e1t tri\u1ec3n ph\u1ea7n m\u1ec1m n\u00f3i chung, m\u1ed9t \u0111\u1ed9 tr\u1ec5 v\u00e0i gi\u00e2y c\u00f3 th\u1ec3 ch\u1ea5p nh\u1eadn \u0111\u01b0\u1ee3c. Trong IoT, c\u00e1c mili gi\u00e2y c\u00f3 th\u1ec3 quy\u1ebft \u0111\u1ecbnh t\u00ednh kh\u1ea3 thi c\u1ee7a h\u1ec7 th\u1ed1ng. Th\u1ebf gi\u1edbi v\u1eadt l\u00fd mang l\u1ea1i nh\u1eefng bi\u1ebfn s\u1ed1 m\u00e0 c\u00e1c s\u01a1 \u0111\u1ed3 logic ph\u1ea7n m\u1ec1m thu\u1ea7n t\u00fay th\u01b0\u1eddng b\u1ecf qua.<\/p>\n

          1. \u0110\u1ed9 tr\u1ec5 v\u00e0 \u0111\u1ed9 dao \u0111\u1ed9ng m\u1ea1ng<\/h3>\n

          C\u00e1c m\u1ea1ng kh\u00f4ng d\u00e2y, nh\u01b0 Wi-Fi, LoRaWAN ho\u1eb7c Zigbee, b\u1ecb \u1ea3nh h\u01b0\u1edfng b\u1edfi \u0111\u1ed9 dao \u0111\u1ed9ng. M\u1ed9t s\u01a1 \u0111\u1ed3 th\u1ee9 t\u1ef1 c\u00f3 th\u1ec3 hi\u1ec3n th\u1ecb tin nh\u1eafn \u0111\u01b0\u1ee3c g\u1eedi v\u00e0 ph\u1ea3n h\u1ed3i \u0111\u01b0\u1ee3c nh\u1eadn. M\u1ed9t s\u01a1 \u0111\u1ed3 th\u1eddi gian cho ph\u00e9p b\u1ea1n m\u00f4 h\u00ecnh h\u00f3a s\u1ef1 bi\u1ebfn thi\u00ean. N\u1ebfu ph\u1ea3n h\u1ed3i ph\u1ea3i \u0111\u1ebfn tr\u01b0\u1edbc khi chu k\u1ef3 c\u1ea3m bi\u1ebfn ti\u1ebfp theo b\u1eaft \u0111\u1ea7u, s\u01a1 \u0111\u1ed3 th\u1eddi gian s\u1ebd ch\u1ec9 ra m\u1ea1ng c\u00f3 \u0111\u00e1ng tin c\u1eady \u0111\u1ee7 hay kh\u00f4ng.<\/p>\n

          2. Qu\u1ea3n l\u00fd pin<\/h3>\n

          N\u0103ng l\u01b0\u1ee3ng l\u00e0 t\u00e0i nguy\u00ean b\u1ecb gi\u1edbi h\u1ea1n nh\u1ea5t \u1edf nhi\u1ec1u n\u00fat IoT. M\u1ed7i mili gi\u00e2y radio ho\u1ea1t \u0111\u1ed9ng s\u1ebd l\u00e0m hao pin. S\u01a1 \u0111\u1ed3 th\u1eddi gian cho ph\u00e9p k\u1ef9 s\u01b0 t\u00ednh to\u00e1n chu k\u1ef3 l\u00e0m vi\u1ec7c m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c. B\u1ea1n c\u00f3 th\u1ec3 m\u00f4 ph\u1ecfng qu\u00e1 tr\u00ecnh chuy\u1ec3n \u0111\u1ed5i t\u1eeb \u201cNg\u1ee7 s\u00e2u\u201d sang \u201cRadio b\u1eadt\u201d r\u1ed3i \u0111\u1ebfn \u201cTruy\u1ec1n ph\u00e1t\u201d v\u00e0 quay l\u1ea1i. \u0110i\u1ec1u n\u00e0y tr\u1ef1c quan h\u00f3a chi ph\u00ed n\u0103ng l\u01b0\u1ee3ng ch\u00ednh x\u00e1c c\u1ee7a m\u1ed9t chu\u1ed7i t\u01b0\u01a1ng t\u00e1c c\u1ee5 th\u1ec3.<\/p>\n

          3. \u0110\u1ed3ng b\u1ed9 ph\u1ea7n c\u1ee9ng<\/h3>\n

          Khi nhi\u1ec1u c\u1ea3m bi\u1ebfn cung c\u1ea5p d\u1eef li\u1ec7u v\u00e0o m\u1ed9t vi \u0111i\u1ec1u khi\u1ec3n duy nh\u1ea5t, \u0111\u1ed9 to\u00e0n v\u1eb9n d\u1eef li\u1ec7u ph\u1ee5 thu\u1ed9c v\u00e0o t\u1ed1c \u0111\u1ed9 l\u1ea5y m\u1eabu. N\u1ebfu m\u1ed9t c\u1ea3m bi\u1ebfn l\u1ea5y m\u1eabu \u1edf 100Hz v\u00e0 c\u1ea3m bi\u1ebfn kh\u00e1c \u1edf 10Hz, s\u01a1 \u0111\u1ed3 th\u1eddi gian gi\u00fap tr\u1ef1c quan h\u00f3a c\u00e1ch vi \u0111i\u1ec1u khi\u1ec3n gh\u00e9p k\u00eanh c\u00e1c thao t\u00e1c \u0111\u1ecdc m\u00e0 kh\u00f4ng l\u00e0m m\u1ea5t d\u1eef li\u1ec7u.<\/p>\n

          Khi n\u00e0o n\u00ean s\u1eed d\u1ee5ng s\u01a1 \u0111\u1ed3 th\u1ee9 t\u1ef1 \ud83e\udde0<\/h2>\n

          M\u1eb7c d\u00f9 th\u1eddi gian r\u1ea5t quan tr\u1ecdng, lu\u1ed3ng logic v\u1eabn l\u00e0 n\u1ec1n t\u1ea3ng c\u1ee7a thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng. S\u01a1 \u0111\u1ed3 th\u1ee9 t\u1ef1 n\u00ean l\u00e0 c\u00f4ng c\u1ee5 ch\u00ednh c\u1ee7a b\u1ea1n trong giai \u0111o\u1ea1n thi\u1ebft k\u1ebf ban \u0111\u1ea7u.<\/p>\n

          Ph\u00e2n t\u00edch y\u00eau c\u1ea7u<\/h3>\n

          C\u00e1c b\u00ean li\u00ean quan th\u01b0\u1eddng hi\u1ec3u r\u00f5 h\u01a1n v\u1ec1 lu\u1ed3ng logic so v\u1edbi c\u00e1c kho\u1ea3ng th\u1eddi gian. M\u00f4 t\u1ea3 m\u1ed9t quy tr\u00ecnh l\u00e0m vi\u1ec7c nh\u01b0 \u201cThi\u1ebft b\u1ecb g\u1eedi d\u1eef li\u1ec7u -> Cloud x\u00e1c th\u1ef1c -> Thi\u1ebft b\u1ecb x\u00e1c nh\u1eadn\u201d d\u1ec5 hi\u1ec3u h\u01a1n \u0111\u1ed1i v\u1edbi ng\u01b0\u1eddi qu\u1ea3n l\u00fd s\u1ea3n ph\u1ea9m so v\u1edbi m\u1ed9t d\u00f2ng th\u1eddi gian t\u00ednh b\u1eb1ng mili gi\u00e2y.<\/p>\n

          S\u1eeda l\u1ed7i logic<\/h3>\n

          N\u1ebfu m\u1ed9t thi\u1ebft b\u1ecb kh\u00f4ng th\u1ec3 k\u1ebft n\u1ed1i, s\u01a1 \u0111\u1ed3 th\u1ee9 t\u1ef1 gi\u00fap theo d\u00f5i \u0111\u01b0\u1eddng \u0111i c\u1ee7a l\u1ed7i. N\u00f3 c\u00f3 g\u1eedi y\u00eau c\u1ea7u kh\u00f4ng? M\u00e1y ch\u1ee7 c\u00f3 ph\u1ea3n h\u1ed3i kh\u00f4ng? Thi\u1ebft b\u1ecb c\u00f3 nh\u1eadn \u0111\u01b0\u1ee3c ph\u1ea3n h\u1ed3i kh\u00f4ng? N\u00f3 t\u00e1ch bi\u1ec7t \u0111\u01b0\u1ee3c \u0111i\u1ec3m l\u1ed7i logic.<\/p>\n

          Giao ti\u1ebfp gi\u1eefa c\u00e1c th\u00e0nh ph\u1ea7n<\/h3>\n

          Trong ph\u1ea7n m\u1ec1m nh\u00fang ph\u1ee9c t\u1ea1p, nhi\u1ec1u lu\u1ed3ng ho\u1eb7c t\u00e1c v\u1ee5 ch\u1ea1y \u0111\u1ed3ng th\u1eddi. S\u01a1 \u0111\u1ed3 th\u1ee9 t\u1ef1 c\u00f3 th\u1ec3 hi\u1ec3n th\u1ecb c\u00e1ch Task A y\u00eau c\u1ea7u d\u1eef li\u1ec7u t\u1eeb Task B. N\u00f3 l\u00e0m r\u00f5 c\u00e1c m\u1ed1i ph\u1ee5 thu\u1ed9c m\u00e0 kh\u00f4ng c\u1ea7n \u0111i s\u00e2u v\u00e0o c\u00e1c chu k\u1ef3 CPU c\u1ee5 th\u1ec3.<\/p>\n

          Khi n\u00e0o n\u00ean s\u1eed d\u1ee5ng s\u01a1 \u0111\u1ed3 th\u1eddi gian \ud83d\udd52<\/h2>\n

          S\u01a1 \u0111\u1ed3 th\u1eddi gian l\u00e0 c\u00f4ng c\u1ee5 chuy\u00ean gia. Ch\u00fang \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng khi logic \u0111\u00e3 \u0111\u01b0\u1ee3c x\u00e1c l\u1eadp, nh\u01b0ng c\u1ea7n ki\u1ec3m ch\u1ee9ng c\u00e1c r\u00e0ng bu\u1ed9c v\u1ec1 th\u1eddi gian.<\/p>\n

          H\u1ec7 \u0111i\u1ec1u h\u00e0nh th\u1eddi gian th\u1ef1c (RTOS)<\/h3>\n

          Khi tri\u1ec3n khai tr\u00ean RTOS, m\u1ee9c \u0111\u1ed9 \u01b0u ti\u00ean t\u00e1c v\u1ee5 v\u00e0 kh\u1ea3 n\u0103ng chi\u1ebfm d\u1ee5ng l\u00e0 \u0111i\u1ec1u quan tr\u1ecdng. S\u01a1 \u0111\u1ed3 th\u1eddi gian c\u00f3 th\u1ec3 minh h\u1ecda c\u00e1ch m\u1ed9t ng\u1eaft c\u00f3 \u0111\u1ed9 \u01b0u ti\u00ean cao chi\u1ebfm d\u1ee5ng m\u1ed9t t\u00e1c v\u1ee5 n\u1ec1n c\u00f3 \u0111\u1ed9 \u01b0u ti\u00ean th\u1ea5p h\u01a1n. N\u00f3 cho th\u1ea5y ch\u00ednh x\u00e1c th\u1eddi \u0111i\u1ec3m t\u00e1c v\u1ee5 n\u1ec1n b\u1ecb t\u1ea1m d\u1eebng.<\/p>\n

          X\u00e1c minh giao di\u1ec7n ph\u1ea7n c\u1ee9ng<\/h3>\n

          \u0110i\u1ec1u khi\u1ec3n c\u00e1c thanh ghi ph\u1ea7n c\u1ee9ng th\u01b0\u1eddng \u0111\u00f2i h\u1ecfi th\u1eddi gian ch\u00ednh x\u00e1c. V\u00ed d\u1ee5, m\u1ed9t giao d\u1ecbch I2C y\u00eau c\u1ea7u c\u00e1c th\u1eddi gian thi\u1ebft l\u1eadp v\u00e0 gi\u1eef c\u1ee5 th\u1ec3. S\u01a1 \u0111\u1ed3 th\u1eddi gian l\u00e0 c\u00e1ch chu\u1ea9n \u0111\u1ec3 ghi l\u1ea1i c\u00e1c \u0111\u1eb7c t\u00ednh \u0111i\u1ec7n n\u00e0y c\u00f9ng v\u1edbi giao th\u1ee9c logic.<\/p>\n

          X\u00e1c \u0111\u1ecbnh c\u00e1c \u0111i\u1ec3m ngh\u1ebdn hi\u1ec7u su\u1ea5t<\/h3>\n

          N\u1ebfu h\u1ec7 th\u1ed1ng ch\u1ea1y qu\u00e1 ch\u1eadm, s\u01a1 \u0111\u1ed3 th\u1eddi gian s\u1ebd ti\u1ebft l\u1ed9 n\u01a1i c\u00e1c \u0111\u1ed9 tr\u1ec5 x\u1ea3y ra. Vi\u1ec7c x\u1eed l\u00fd c\u00f3 m\u1ea5t qu\u00e1 nhi\u1ec1u th\u1eddi gian kh\u00f4ng? Vi\u1ec7c ch\u1edd m\u1ea1ng c\u00f3 \u0111ang ch\u1eb7n lu\u1ed3ng ch\u00ednh kh\u00f4ng? Tr\u1ee5c ngang s\u1ebd l\u00e0m cho c\u00e1c \u0111i\u1ec3m ngh\u1ebdn n\u00e0y tr\u1edf n\u00ean r\u00f5 r\u00e0ng v\u1ec1 m\u1eb7t tr\u1ef1c quan.<\/p>\n

          K\u1ebft h\u1ee3p c\u1ea3 hai \u0111\u1ec3 thi\u1ebft k\u1ebf b\u1ec1n v\u1eefng \ud83c\udfd7\ufe0f<\/h2>\n

          Ph\u00e1t tri\u1ec3n IoT c\u1ea5p cao hi\u1ebfm khi d\u1ef1a v\u00e0o ch\u1ec9 m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p. T\u00e0i li\u1ec7u b\u1ec1n v\u1eefng nh\u1ea5t k\u1ebft h\u1ee3p c\u1ea3 hai. S\u01a1 \u0111\u1ed3 th\u1ee9 t\u1ef1 cung c\u1ea5p b\u1ea3n \u0111\u1ed3 h\u00e0nh tr\u00ecnh, trong khi s\u01a1 \u0111\u1ed3 th\u1eddi gian cung c\u1ea5p gi\u1edbi h\u1ea1n t\u1ed1c \u0111\u1ed9 v\u00e0 th\u1eddi gian di chuy\u1ec3n.<\/p>\n

          T\u00edch h\u1ee3p t\u1eebng b\u01b0\u1edbc<\/h3>\n
            \n
          • B\u1eaft \u0111\u1ea7u v\u1edbi th\u1ee9 t\u1ef1:<\/strong> X\u00e1c \u0111\u1ecbnh lu\u1ed3ng tin nh\u1eafn gi\u1eefa thi\u1ebft b\u1ecb, c\u1ed5ng giao ti\u1ebfp v\u00e0 \u0111\u00e1m m\u00e2y.<\/li>\n
          • X\u00e1c \u0111\u1ecbnh c\u00e1c \u0111\u01b0\u1eddng \u0111i quan tr\u1ecdng:<\/strong> Ghi ch\u00fa nh\u1eefng t\u01b0\u01a1ng t\u00e1c n\u00e0o c\u00f3 th\u1eddi h\u1ea1n nghi\u00eam ng\u1eb7t (v\u00ed d\u1ee5: c\u1ea3nh b\u00e1o an to\u00e0n so v\u1edbi nh\u1eadt k\u00fd d\u1eef li\u1ec7u c\u1ea3m bi\u1ebfn).<\/li>\n
          • \u00c1p d\u1ee5ng th\u1eddi gian:<\/strong> \u0110\u1ed1i v\u1edbi c\u00e1c \u0111\u01b0\u1eddng \u0111i quan tr\u1ecdng, t\u1ea1o s\u01a1 \u0111\u1ed3 th\u1eddi gian \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh \u0111\u1ed9 tr\u1ec5 cho ph\u00e9p t\u1ed1i \u0111a.<\/li>\n
          • X\u00e1c minh:<\/strong> Ki\u1ec3m tra xem c\u00e1c gi\u1edbi h\u1ea1n th\u1eddi gian c\u00f3 ph\u00f9 h\u1ee3p v\u1edbi kh\u1ea3 n\u0103ng ph\u1ea7n c\u1ee9ng hay kh\u00f4ng.<\/li>\n<\/ul>\n

            Lu\u1ed3ng c\u00f4ng vi\u1ec7c v\u00ed d\u1ee5: C\u1ea3nh b\u00e1o an to\u00e0n<\/h3>\n

            H\u00e3y xem x\u00e9t m\u1ed9t c\u1ea3m bi\u1ebfn ph\u00e1t hi\u1ec7n ch\u00e1y.<\/p>\n

              \n
            1. Th\u1ee9 t\u1ef1:<\/strong> C\u1ea3m bi\u1ebfn ph\u00e1t hi\u1ec7n nhi\u1ec7t -> G\u1eedi c\u1ea3nh b\u00e1o -> C\u1ed5ng giao ti\u1ebfp chuy\u1ec3n ti\u1ebfp -> \u0110\u00e1m m\u00e2y th\u00f4ng b\u00e1o ng\u01b0\u1eddi d\u00f9ng.<\/li>\n
            2. Th\u1eddi gian:<\/strong> Th\u1eddi gian t\u1eeb ph\u00e1t hi\u1ec7n \u0111\u1ebfn truy\u1ec1n c\u1ea3nh b\u00e1o ph\u1ea3i nh\u1ecf h\u01a1n 100ms. \u0110\u1ed9 tr\u1ec5 m\u1ea1ng ph\u1ea3i nh\u1ecf h\u01a1n 500ms. Th\u1eddi gian k\u1ebft n\u1ed1i \u0111\u1ea7u \u0111\u1ebfn cu\u1ed1i t\u1ed5ng c\u1ed9ng ph\u1ea3i nh\u1ecf h\u01a1n 1 gi\u00e2y.<\/li>\n<\/ol>\n

              N\u1ebfu s\u01a1 \u0111\u1ed3 th\u1ee9 t\u1ef1 ho\u00e0n h\u1ea3o nh\u01b0ng s\u01a1 \u0111\u1ed3 th\u1eddi gian cho th\u1ea5y \u0111\u1ed9 tr\u1ec5 2 gi\u00e2y, h\u1ec7 th\u1ed1ng s\u1ebd kh\u00f4ng \u0111\u00e1p \u1ee9ng y\u00eau c\u1ea7u.<\/p>\n

              Nh\u1eefng sai l\u1ea7m ph\u1ed5 bi\u1ebfn khi m\u00f4 h\u00ecnh h\u00f3a \ud83d\udeab<\/h2>\n

              Ngay c\u1ea3 c\u00e1c k\u1ef9 s\u01b0 c\u00f3 kinh nghi\u1ec7m c\u0169ng m\u1eafc sai l\u1ea7m khi tr\u1ef1c quan h\u00f3a c\u00e1c h\u1ec7 th\u1ed1ng IoT. Nh\u1eadn th\u1ee9c v\u1ec1 nh\u1eefng l\u1ed7i ph\u1ed5 bi\u1ebfn n\u00e0y gi\u00fap duy tr\u00ec \u0111\u1ed9 ch\u00ednh x\u00e1c.<\/p>\n

              1. Nh\u1ea7m l\u1eabn gi\u1eefa th\u1eddi gian logic v\u00e0 th\u1eddi gian v\u1eadt l\u00fd<\/h3>\n

              S\u01a1 \u0111\u1ed3 th\u1ee9 t\u1ef1 ng\u1ee5 \u00fd th\u1eddi gian ch\u1ea3y xu\u1ed1ng d\u01b0\u1edbi. M\u1ed9t nh\u00e0 ph\u00e1t tri\u1ec3n c\u00f3 th\u1ec3 nh\u1ea7m kho\u1ea3ng c\u00e1ch gi\u1eefa c\u00e1c tin nh\u1eafn v\u1edbi th\u1eddi l\u01b0\u1ee3ng. Lu\u00f4n \u0111\u00e1nh d\u1ea5u tr\u1ee5c r\u00f5 r\u00e0ng. S\u1eed d\u1ee5ng s\u01a1 \u0111\u1ed3 th\u1eddi gian khi th\u1eddi l\u01b0\u1ee3ng l\u00e0 bi\u1ebfn s\u1ed1.<\/p>\n

              2. B\u1ecf qua h\u00e0nh vi b\u1ea5t \u0111\u1ed3ng b\u1ed9<\/h3>\n

              C\u00e1c thi\u1ebft b\u1ecb IoT th\u01b0\u1eddng ho\u1ea1t \u0111\u1ed9ng b\u1ea5t \u0111\u1ed3ng b\u1ed9. Vi\u1ec7c ch\u1edd ph\u1ea3n h\u1ed3i m\u1ea1ng c\u00f3 th\u1ec3 l\u00e0m treo thi\u1ebft b\u1ecb. S\u01a1 \u0111\u1ed3 th\u1ee9 t\u1ef1 c\u00f3 th\u1ec3 hi\u1ec3n th\u1ecb m\u1ed9t l\u1eddi g\u1ecdi b\u1ecb ch\u1eb7n. S\u01a1 \u0111\u1ed3 th\u1eddi gian s\u1ebd ti\u1ebft l\u1ed9 th\u1eddi gian ch\u1edd kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng trong qu\u00e1 tr\u00ecnh n\u00e0y, \u0111i\u1ec1u n\u00e0y r\u1ea5t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi ph\u00e2n t\u00edch n\u0103ng l\u01b0\u1ee3ng.<\/p>\n

              3. Qu\u00e1 m\u1ee9c ph\u1ee9c t\u1ea1p<\/h3>\n

              C\u1ed1 g\u1eafng m\u00f4 h\u00ecnh h\u00f3a t\u1eebng mili gi\u00e2y c\u1ee7a m\u1ed9t h\u1ec7 th\u1ed1ng ph\u1ee9c t\u1ea1p s\u1ebd d\u1eabn \u0111\u1ebfn c\u00e1c s\u01a1 \u0111\u1ed3 kh\u00f4ng th\u1ec3 \u0111\u1ecdc \u0111\u01b0\u1ee3c. H\u00e3y t\u1eadp trung v\u00e0o c\u00e1c \u0111\u01b0\u1eddng \u0111i quan tr\u1ecdng. S\u01a1 \u0111\u1ed3 th\u1eddi gian cho to\u00e0n b\u1ed9 v\u00f2ng \u0111\u1eddi h\u1ec7 th\u1ed1ng qu\u00e1 l\u1edbn; h\u00e3y t\u1eadp trung v\u00e0o \u0111\u1ee3t truy\u1ec1n th\u00f4ng.<\/p>\n

              4. Thi\u1ebfu kh\u1ea3 n\u0103ng duy tr\u00ec tr\u1ea1ng th\u00e1i<\/h3>\n

              Trong IoT, tr\u1ea1ng th\u00e1i th\u01b0\u1eddng \u0111\u01b0\u1ee3c duy tr\u00ec xuy\u00ean su\u1ed1t c\u00e1c l\u1ea7n kh\u1edfi \u0111\u1ed9ng l\u1ea1i. C\u00e1c s\u01a1 \u0111\u1ed3 c\u1ea7n ch\u1ec9 r\u00f5 n\u1ebfu m\u1ed9t tin nh\u1eafn b\u1ecb m\u1ea5t v\u00e0 c\u1ea7n \u0111\u01b0\u1ee3c g\u1eedi l\u1ea1i. C\u00e1c s\u01a1 \u0111\u1ed3 th\u1eddi gian c\u00f3 th\u1ec3 hi\u1ec3n th\u1ecb kho\u1ea3ng th\u1eddi gian ch\u1edd \u0111\u1ec3 th\u1eed l\u1ea1i.<\/p>\n

              C\u00e1c th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t cho t\u00e0i li\u1ec7u \ud83d\udcdd<\/h2>\n

              \u0110\u1ec3 \u0111\u1ea3m b\u1ea3o c\u00e1c s\u01a1 \u0111\u1ed3 n\u00e0y v\u1eabn h\u1eefu \u00edch trong su\u1ed1t v\u00f2ng \u0111\u1eddi ph\u00e1t tri\u1ec3n, h\u00e3y tu\u00e2n theo c\u00e1c h\u01b0\u1edbng d\u1eabn sau.<\/p>\n

                \n
              • T\u00ean g\u1ecdi nh\u1ea5t qu\u00e1n:<\/strong>S\u1eed d\u1ee5ng c\u00f9ng m\u1ed9t t\u00ean cho c\u00e1c \u0111\u01b0\u1eddng s\u1ed1ng trong c\u1ea3 hai lo\u1ea1i s\u01a1 \u0111\u1ed3 \u0111\u1ec3 tr\u00e1nh nh\u1ea7m l\u1eabn.<\/li>\n
              • Ki\u1ec3m so\u00e1t phi\u00ean b\u1ea3n:<\/strong>Xem s\u01a1 \u0111\u1ed3 nh\u01b0 m\u00e3 ngu\u1ed3n. L\u01b0u tr\u1eef ch\u00fang trong c\u00f9ng m\u1ed9t kho l\u01b0u tr\u1eef v\u1edbi ph\u1ea7n m\u1ec1m c\u00e0i \u0111\u1eb7t.<\/li>\n
              • C\u1eadp nh\u1eadt th\u01b0\u1eddng xuy\u00ean:<\/strong>N\u1ebfu giao th\u1ee9c thay \u0111\u1ed5i, h\u00e3y c\u1eadp nh\u1eadt s\u01a1 \u0111\u1ed3 th\u1ee9 t\u1ef1. N\u1ebfu y\u00eau c\u1ea7u \u0111\u1ed9 tr\u1ec5 thay \u0111\u1ed5i, h\u00e3y c\u1eadp nh\u1eadt s\u01a1 \u0111\u1ed3 th\u1eddi gian.<\/li>\n
              • Gi\u1eef cho n\u00f3 d\u1ec5 \u0111\u1ecdc:<\/strong>Tr\u00e1nh l\u00e0m r\u1ed1i tr\u1ee5c ngang b\u1eb1ng qu\u00e1 nhi\u1ec1u \u0111\u01b0\u1eddng s\u1ed1ng. Chia c\u00e1c t\u01b0\u01a1ng t\u00e1c ph\u1ee9c t\u1ea1p th\u00e0nh nhi\u1ec1u s\u01a1 \u0111\u1ed3.<\/li>\n
              • S\u1eed d\u1ee5ng k\u00fd hi\u1ec7u chu\u1ea9n:<\/strong>Tu\u00e2n th\u1ee7 c\u00e1c chu\u1ea9n UML \u0111\u1ec3 b\u1ea5t k\u1ef3 nh\u00e0 ph\u00e1t tri\u1ec3n n\u00e0o c\u0169ng c\u00f3 th\u1ec3 hi\u1ec3u ng\u00f4n ng\u1eef tr\u1ef1c quan.<\/li>\n<\/ul>\n

                C\u00e1c c\u00e2n nh\u1eafc k\u1ef9 thu\u1eadt cho vi\u1ec7c tri\u1ec3n khai \ud83d\udd27<\/h2>\n

                Khi chuy\u1ec3n c\u00e1c s\u01a1 \u0111\u1ed3 n\u00e0y th\u00e0nh m\u00e3 th\u1ef1c t\u1ebf, m\u1ed9t s\u1ed1 y\u1ebfu t\u1ed1 k\u1ef9 thu\u1eadt s\u1ebd ph\u00e1t sinh.<\/p>\n

                1. \u0110\u1ed3ng b\u1ed9 \u0111\u1ed3ng h\u1ed3<\/h3>\n

                C\u00e1c s\u01a1 \u0111\u1ed3 th\u1eddi gian gi\u1ea3 \u0111\u1ecbnh m\u1ed9t kh\u00e1i ni\u1ec7m chung v\u1ec1 th\u1eddi gian. Trong c\u00e1c h\u1ec7 th\u1ed1ng IoT ph\u00e2n t\u00e1n, \u0111\u1ed3ng h\u1ed3 c\u00f3 th\u1ec3 b\u1ecb l\u1ec7ch. C\u00f3 th\u1ec3 c\u1ea7n \u0111\u1ed3ng b\u1ed9 h\u00f3a NTP ho\u1eb7c GPS. S\u01a1 \u0111\u1ed3 c\u1ea7n ph\u1ea3n \u00e1nh c\u01a1 ch\u1ebf \u0111\u1ed3ng b\u1ed9 h\u00f3a n\u1ebfu n\u00f3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn th\u1eddi gian.<\/p>\n

                2. C\u00e1c tr\u00ecnh d\u1ecbch v\u1ee5 ng\u1eaft (ISR)<\/h3>\n

                C\u00e1c ISR ch\u1ea1y b\u00ean ngo\u00e0i v\u00f2ng l\u1eb7p ch\u00ednh. S\u01a1 \u0111\u1ed3 th\u1eddi gian l\u00e0 c\u00e1ch t\u1ed1t nh\u1ea5t \u0111\u1ec3 ghi ch\u00e9p \u0111\u1ed9 tr\u1ec5 c\u1ee7a ISR. N\u00f3 cho th\u1ea5y ch\u01b0\u01a1ng tr\u00ecnh ch\u00ednh b\u1ecb t\u1ea1m d\u1eebng bao l\u00e2u trong khi ISR \u0111ang th\u1ef1c thi.<\/p>\n

                3. Qu\u1ea3n l\u00fd b\u1ed9 \u0111\u1ec7m<\/h3>\n

                D\u1eef li\u1ec7u \u0111\u1ebfn d\u01b0\u1edbi d\u1ea1ng g\u00f3i tin. N\u1ebfu b\u1ed9 \u0111\u1ec7m \u0111\u1ea7y tr\u01b0\u1edbc khi \u0111\u01b0\u1ee3c x\u1eed l\u00fd, d\u1eef li\u1ec7u s\u1ebd b\u1ecb m\u1ea5t. C\u00e1c s\u01a1 \u0111\u1ed3 th\u1eddi gian c\u00f3 th\u1ec3 tr\u1ef1c quan h\u00f3a t\u1ed1c \u0111\u1ed9 \u0111\u1ea7y b\u1ed9 \u0111\u1ec7m so v\u1edbi t\u1ed1c \u0111\u1ed9 x\u1eed l\u00fd.<\/p>\n

                K\u1ebft lu\u1eadn \ud83c\udfc1<\/h2>\n

                Vi\u1ec7c l\u1ef1a ch\u1ecdn gi\u1eefa s\u01a1 \u0111\u1ed3 th\u1ee9 t\u1ef1 v\u00e0 s\u01a1 \u0111\u1ed3 th\u1eddi gian ph\u1ee5 thu\u1ed9c v\u00e0o nhu c\u1ea7u c\u1ee5 th\u1ec3 c\u1ee7a d\u1ef1 \u00e1n IoT c\u1ee7a b\u1ea1n. S\u01a1 \u0111\u1ed3 th\u1ee9 t\u1ef1 xu\u1ea5t s\u1eafc trong vi\u1ec7c x\u00e1c \u0111\u1ecbnh th\u1ee9 t\u1ef1 logic c\u1ee7a c\u00e1c thao t\u00e1c, \u0111\u1ea3m b\u1ea3o r\u1eb1ng c\u00e1c tin nh\u1eafn \u0111\u00fang \u0111\u01b0\u1ee3c g\u1eedi theo \u0111\u00fang th\u1ee9 t\u1ef1. S\u01a1 \u0111\u1ed3 th\u1eddi gian xu\u1ea5t s\u1eafc trong vi\u1ec7c x\u00e1c \u0111\u1ecbnh c\u00e1c r\u00e0ng bu\u1ed9c v\u1ec1 th\u1eddi gian, \u0111\u1ea3m b\u1ea3o h\u1ec7 th\u1ed1ng \u0111\u00e1p \u1ee9ng \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u \u0111\u1ed9 tr\u1ec5 v\u00e0 ti\u00eau th\u1ee5 n\u0103ng l\u01b0\u1ee3ng.<\/p>\n

                \u0110\u1ed1i v\u1edbi m\u1ed9t ki\u1ebfn tr\u00fac v\u1eefng ch\u1eafc, \u0111\u1eebng ch\u1ecdn m\u1ed9t m\u00e0 b\u1ecf c\u00e1i kia. S\u1eed d\u1ee5ng s\u01a1 \u0111\u1ed3 th\u1ee9 t\u1ef1 \u0111\u1ec3 b\u1ea3n \u0111\u1ed3 h\u00e0nh tr\u00ecnh v\u00e0 s\u01a1 \u0111\u1ed3 th\u1eddi gian \u0111\u1ec3 \u0111o t\u1ed1c \u0111\u1ed9. C\u00e1ch ti\u1ebfp c\u1eadn k\u00e9p n\u00e0y cung c\u1ea5p c\u00e1i nh\u00ecn to\u00e0n di\u1ec7n v\u1ec1 h\u00e0nh vi h\u1ec7 th\u1ed1ng, gi\u1ea3m thi\u1ec3u r\u1ee7i ro c\u00e1c v\u1ea5n \u0111\u1ec1 t\u00edch h\u1ee3p trong th\u1ef1c t\u1ebf.<\/p>\n

                B\u1eb1ng c\u00e1ch \u00e1p d\u1ee5ng c\u00e1c k\u1ef9 thu\u1eadt m\u00f4 h\u00ecnh h\u00f3a n\u00e0y m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c, c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n IoT c\u00f3 th\u1ec3 x\u00e2y d\u1ef1ng c\u00e1c h\u1ec7 th\u1ed1ng kh\u00f4ng ch\u1ec9 h\u1ee3p l\u00fd v\u1ec1 m\u1eb7t logic m\u00e0 c\u00f2n hi\u1ec7u su\u1ea5t cao trong gi\u1edbi h\u1ea1n v\u1eadt l\u00fd c\u1ee7a th\u1ebf gi\u1edbi th\u1ef1c.<\/p>\n","protected":false},"excerpt":{"rendered":"

                Ecosysytem Internet of Things (IoT) \u0111\u01b0\u1ee3c \u0111\u1eb7c tr\u01b0ng b\u1edfi \u0111\u1ed9 ph\u1ee9c t\u1ea1p. Kh\u00f4ng ch\u1ec9 \u0111\u01a1n thu\u1ea7n l\u00e0 k\u1ebft n\u1ed1i c\u00e1c thi\u1ebft b\u1ecb; m\u00e0 c\u00f2n l\u00e0 vi\u1ec7c ph\u1ed1i h\u1ee3p c\u00e1c t\u01b0\u01a1ng t\u00e1c qua c\u00e1c m\u1ea1ng kh\u00f4ng \u0111\u1ed3ng nh\u1ea5t, ph\u1ea7n c\u1ee9ng b\u1ecb gi\u1edbi h\u1ea1n v\u00e0 c\u00e1c y\u00eau c\u1ea7u v\u1ec1 th\u1eddi gian nghi\u00eam ng\u1eb7t. \u0110\u1ed1i v\u1edbi c\u00e1c nh\u00e0 […]<\/p>\n","protected":false},"author":1,"featured_media":1553,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[13],"tags":[44,47],"class_list":["post-1552","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-unified-modeling-language","tag-academic","tag-timing-diagram"],"yoast_head":"\nS\u01a1 \u0111\u1ed3 th\u1eddi gian so v\u1edbi s\u01a1 \u0111\u1ed3 th\u1ee9 t\u1ef1 cho c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n IoT \u26a1<\/title>\n<meta name=\"description\" content=\"So s\u00e1nh s\u01a1 \u0111\u1ed3 th\u1eddi gian v\u00e0 s\u01a1 \u0111\u1ed3 th\u1ee9 t\u1ef1 cho IoT. 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