步驟 1：建立原 AWS IoT 則

創建一個 AWS IoT 策略，允許您的 Raspberry Pi 連接並將消息發送到 AWS IoT。

1. 在 AWS IoT 主控台中，如果 Get started (開始) 按鈕出現，請選擇它。否則，請在導覽窗格中展開 Security (安全性)，然後選擇 Policies (政策)。

2. 如果 You don’t have any policies yet (您尚未有任何政策) 對話方塊出現，請選擇 Create a policy (建立政策)。否則，請選擇 Create (建立)。

3. 輸入 AWS IoT 策略的名稱 (例如，MoistureSensorPolicy)。

4. 在 Add statements (新增陳述式) 區段中，將現有政策取代為下列 JSON。使用您的和號碼取代地區 AWS 區域 和帳 AWS 帳戶 戶。

   {
      "Version": "2012-10-17",
      "Statement": [{
            "Effect": "Allow",
            "Action": "iot:Connect",
            "Resource": "arn:aws:iot:region:account:client/RaspberryPi"
         },
         {
            "Effect": "Allow",
            "Action": "iot:Publish",
            "Resource": [
               "arn:aws:iot:region:account:topic/$aws/things/RaspberryPi/shadow/update",
               "arn:aws:iot:region:account:topic/$aws/things/RaspberryPi/shadow/delete",
               "arn:aws:iot:region:account:topic/$aws/things/RaspberryPi/shadow/get"
            ]
         },
         {
            "Effect": "Allow",
            "Action": "iot:Receive",
            "Resource": [
               "arn:aws:iot:region:account:topic/$aws/things/RaspberryPi/shadow/update/accepted",
               "arn:aws:iot:region:account:topic/$aws/things/RaspberryPi/shadow/delete/accepted",
               "arn:aws:iot:region:account:topic/$aws/things/RaspberryPi/shadow/get/accepted",
               "arn:aws:iot:region:account:topic/$aws/things/RaspberryPi/shadow/update/rejected",
               "arn:aws:iot:region:account:topic/$aws/things/RaspberryPi/shadow/delete/rejected"
            ]
         },
         {
            "Effect": "Allow",
            "Action": "iot:Subscribe",
            "Resource": [
               "arn:aws:iot:region:account:topicfilter/$aws/things/RaspberryPi/shadow/update/accepted",
               "arn:aws:iot:region:account:topicfilter/$aws/things/RaspberryPi/shadow/delete/accepted",
               "arn:aws:iot:region:account:topicfilter/$aws/things/RaspberryPi/shadow/get/accepted",
               "arn:aws:iot:region:account:topicfilter/$aws/things/RaspberryPi/shadow/update/rejected",
               "arn:aws:iot:region:account:topicfilter/$aws/things/RaspberryPi/shadow/delete/rejected"
            ]
         },
         {
            "Effect": "Allow",
            "Action": [
               "iot:GetThingShadow",
               "iot:UpdateThingShadow",
               "iot:DeleteThingShadow"
            ],
            "Resource": "arn:aws:iot:region:account:thing/RaspberryPi"
   
         }
      ]
   }

5. 選擇建立。