[7688 Duo] DHTXX實測

• Conclusions：
• https://www.facebook.com/groups/makerpro.cc/permalink/973163109444410/?comment_id=973311472762907&reply_comment_id=974200559340665&notif_t=group_comment
• https://labs.mediatek.com/forums/posts/list/4081.page
• You can't read 1wire device through such platform easily ....its timing issue, better use a i2c version of Dht , I.e. Am2320 ....
• https://www.facebook.com/groups/makerpro.cc/permalink/965615530199168/?comment_id=965616790199042&ref=notif&notif_t=group_comment
•  用MTK回覆的cli()和sei()成功解掉了！
• 有人用 Duo成功把PM2.5及溫溼感測器接上MCS了所以7688是可以接sensors?!
• https://github.com/future/Linkit7688_PM2.5
• DHTx：讀取sensoring data要靠S/W
  SHT2X：屬I2C（inter-IC）伝輸，有H/W clock來處理資料同步問題
  我的理解是這樣
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