首先用模擬器試下看看它發的啥?
.........................Send one mqtt packet.........................
FixHeader{
PacketTag = 48
PacketType = 3
RemainLength = 28
}
VariableHeaderPublish{
topic_name_len_= 3
topic_name= $dp
}
PayloadPublish{
payload_= [0x03]類型 [0x00 0x14]數據長度 0x7B 0x22 0x74 0x65 0x6D 0x70 0x65 0x72 0x61 0x74 0x75 0x72 0x65
0x22 0x3A 0x32 0x38 0x2E 0x36 0x7D
}Send One Packet Succ:
.........................Send one mqtt packet.........................
FixHeader{
PacketTag = 192
PacketType = 12
RemainLength = 0
}Send One Packet Succ:
仔細觀察PayloadPublish發現除了溫度的json數據外,還多3個字節: 類型+json格式數據長度
除了這個之外,發送主題要改成 "$dp"
上傳成功後就可以到相應設備的數據流裏去看數據了: