一、功能介绍：（同官网说明书）
数据读写功能主要是服务器通过链路通道下发查询和设置命令，通过该命令直接获取点位数据或者修改点位数据的操作。和主动上报 功能可以同时运行。数据的读和写功能需要开启使能，设定好点位读写的协议方式，云端按照设定好的通信协议进行点位数据的获取和修改控制。
注：边缘网关的数据读写功能，只能读和写已经配置好的点表数据，非点表数据无法操作。
通道选择：如果选择MQTT，阿里云，AWS等MQTT通信方式的通道，需要单独配置读写的订阅和发布主题。
读写方式：支持ModbusRTU，ModbusTCP和Json，其中Json具有固定的协议。
Json 读写命令格式：（可以同时获取多个点位数据）
{"rw_prot":{"Ver":"协议版本","dir":"数据走向","id":"信息编号","r_data":[{"name":"点位名称"}],"w_data":[{"name":"点位名称 ","value":"data"}]}}
Json读写命令字段说明
字段名称 | 字段说明 | 字段选择 |
rw_prot | 协议包头 | |
ver | 协议版本 | 1.0.1 |
dir | 数据走向，服务器下发命令填入down | down：服务器下发 |
id | 服务器下发数据的编码，可以作为序列识别使用 | 客户自定义，设备回复不做改变 |
r_data | 数据读取字段 | |
w_data | 数据控制字段 | |
name | 点位名称，和点表中的点位名称一致即可代入点位 | |
value | 读写命令中仅有写有value字段，为写入的有效值 |
Json读写回复格式：
{"rw_prot": {"Ver": "协议版本","dir": "数据走向","id": "信息编号","r_data": [{"name": "点位名称","value": "data","err": "错误码"}],"w_data": [{"name": "点位名称","value": "data","err": "错误码"}]}}
Json读写回复字段说明：
字段名称 | 字段说明 | 字段选择 |
rw_prot | 协议包头 | |
ver | 协议版本 | 1.0.1 |
dir | 数据走向，设备回复内容填入up | up：设备回复 |
id | 信息识别码，保持和下发命令一致 | |
r_data | 数据读取字段 | |
w_data | 数据控制字段 | |
name | 点位名称，对应点表中的点位 | |
value | 点位对应的有效数据 | 读错误，value有效值为空 写错误，value值为历史值 |
err | 错误码 | 0：数据正常执行 1：数据错误执行 |
Json字段错误回复：
Json格式错误：设备不做回复
ver，dir，id三个字段，任意一个错误，则按照错误协议进行回复。
其他字段正确，r_data或w_data字段仅错误一个，则错误的字段舍弃，正确字段进行回复；如果两个字段都错误，按照错误协议回复。
错误协议："rw_prot": {"Ver": "1.0.1","dir": "up","err":"1"}
字段名称 | 字段说明 | 字段选择 |
rw_prot | 协议包头 | |
ver | 协议版本 | 1.0.1 |
dir | 数据走向，上报和下发两种 | up：设备回复 |
err | 错误码 | 0：正常执行 1：错误执行 |
说明：
读写命令错误时，读命令回复内容的value值为空，写命令的回复内容的value值为历史数据值。
读写操作最大上限为读写各5个数据点位同时操作。
二、示例
点表示例：
1、 读1个点位值：
下发：
{
"rw_prot": {
"Ver": "1.0.1",
"dir": "down",
"id": "123",
"r_data": [{
"name": "node0201"
}]
}
}
响应：
{"rw_prot":{"Ver":"1.0.1","dir":"up","id":"123","r_data":[{"name":"node0201","value":"1","err":"0"}]}}
2、读2个点位值：
下发：
{
"rw_prot": {
"Ver": "1.0.1",
"dir": "down",
"id": "123",
"r_data": [{
"name": "node0201"
},
{
"name": "node0202"
}]
}
}
响应：
{"rw_prot":{"Ver":"1.0.1","dir":"up","id":"123","r_data":[{"name":"node0201","value":"1","err":"0"},{"name":"node0202","value":"2","err":"0"}]}}
3、读3个点位值：
下发：
{
"rw_prot": {
"Ver": "1.0.1",
"dir": "down",
"id": "123",
"r_data": [{
"name": "node0201"
},
{
"name": "node0202"
},
{
"name": "node0203"
}]
}
}
响应：
{"rw_prot":{"Ver":"1.0.1","dir":"up","id":"123","r_data":[{"name":"node0201","value":"1","err":"0"},{"name":"node0202","value":"2","err":"0"},{"name":"node0203","value":"3","err":"0"}]}}
4、读4个点位值：
下发：
{
"rw_prot": {
"Ver": "1.0.1",
"dir": "down",
"id": "123",
"r_data": [{
"name": "node0201"
},
{
"name": "node0202"
},
{
"name": "node0203"
},
{
"name": "node0204"
}]
}
}
响应：
{"rw_prot":{"Ver":"1.0.1","dir":"up","id":"123","r_data":[{"name":"node0201","value":"1","err":"0"},{"name":"node0202","value":"2","err":"0"},{"name":"node0203","value":"3","err":"0"},{"name":"node0204","value":"4","err":"0"}]}}
5、读5个点位值：
下发：
{
"rw_prot": {
"Ver": "1.0.1",
"dir": "down",
"id": "123",
"r_data": [{
"name": "node0201"
},
{
"name": "node0202"
},
{
"name": "node0203"
},
{
"name": "node0204"
},
{
"name": "node0205"
}]
}
}
响应：
{"rw_prot":{"Ver":"1.0.1","dir":"up","id":"123","r_data":[{"name":"node0201","value":"1","err":"0"},{"name":"node0202","value":"2","err":"0"},{"name":"node0203","value":"3","err":"0"},{"name":"node0204","value":"4","err":"0"},{"name":"node0205","value":"5","err":"0"}]}}
6、写1个点位：
下发：
{
"rw_prot": {
"Ver": "1.0.1",
"dir": "down",
"id": "123",
"w_data": [{
"name": "node0201",
"value": "100"
}]
}
}
响应：
{"rw_prot":{"Ver":"1.0.1","dir":"up","id":"123","w_data":[{"name":"node0201","value":"100","err":"0"}]}}
7、写2个点位：
下发：
{
"rw_prot": {
"Ver": "1.0.1",
"dir": "down",
"id": "123",
"w_data": [{
"name": "node0201",
"value": "100"
},
{
"name": "node0202",
"value": "200"
}]
}
}
响应：
{"rw_prot":{"Ver":"1.0.1","dir":"up","id":"123","w_data":[{"name":"node0201","value":"100","err":"0"},{"name":"node0202","value":"200","err":"0"}]}}
8、写3个点位：
下发：
{
"rw_prot": {
"Ver": "1.0.1",
"dir": "down",
"id": "123",
"w_data": [{
"name": "node0201",
"value": "100"
},
{
"name": "node0202",
"value": "200"
},
{
"name": "node0203",
"value": "300"
}]
}
}
响应：
{"rw_prot":{"Ver":"1.0.1","dir":"up","id":"123","w_data":[{"name":"node0201","value":"100","err":"0"},{"name":"node0202","value":"200","err":"0"},{"name":"node0203","value":"300","err":"0"}]}}
9、写4个点位：
下发：
{
"rw_prot": {
"Ver": "1.0.1",
"dir": "down",
"id": "123",
"w_data": [{
"name": "node0201",
"value": "100"
},
{
"name": "node0202",
"value": "200"
},
{
"name": "node0203",
"value": "300"
},
{
"name": "node0204",
"value": "400"
}]
}
}
响应：
{"rw_prot":{"Ver":"1.0.1","dir":"up","id":"123","w_data":[{"name":"node0201","value":"100","err":"0"},{"name":"node0202","value":"200","err":"0"},{"name":"node0203","value":"300","err":"0"},{"name":"node0204","value":"400","err":"0"}]}}
10、写5个点位：
下发：
{
"rw_prot": {
"Ver": "1.0.1",
"dir": "down",
"id": "123",
"w_data": [{
"name": "node0201",
"value": "100"
},
{
"name": "node0202",
"value": "200"
},
{
"name": "node0203",
"value": "300"
},
{
"name": "node0204",
"value": "400"
},
{
"name": "node0205",
"value": "500"
}]
}
}
响应：
{"rw_prot":{"Ver":"1.0.1","dir":"up","id":"123","w_data":[{"name":"node0201","value":"100","err":"0"},{"name":"node0202","value":"200","err":"0"},{"name":"node0203","value":"300","err":"0"},{"name":"node0204","value":"400","err":"0"},{"name":"node0205","value":"500","err":"0"}]}}
11、读1个点位写1个点位：
下发：
{
"rw_prot": {
"Ver": "1.0.1",
"dir": "down",
"id": "123",
"r_data": [{
"name": "node0202"
}],
"w_data": [{
"name": "node0201",
"value": "100"
}]
}
}
响应：
{"rw_prot":{"Ver":"1.0.1","dir":"up","id":"123","r_data":[{"name":"node0202","value":"200","err":"0"}],"w_data":[{"name":"node0201","value":"100","err":"0"}]}}
12、读2个点位写2个点位：
下发：
{
"rw_prot": {
"Ver": "1.0.1",
"dir": "down",
"id": "123",
"r_data": [{
"name": "node0201"
},
{
"name": "node0202"
}],
"w_data": [{
"name": "node0201",
"value": "100"
},
{
"name": "node0202",
"value": "200"
}]
}
}
响应：
{"rw_prot":{"Ver":"1.0.1","dir":"up","id":"123","r_data":[{"name":"node0201","value":"100","err":"0"},{"name":"node0202","value":"200","err":"0"}],"w_data":[{"name":"node0201","value":"100","err":"0"},{"name":"node0202","value":"200","err":"0"}]}}
13、读3个点位写3个点位：
下发：
{
"rw_prot": {
"Ver": "1.0.1",
"dir": "down",
"id": "123",
"r_data": [{
"name": "node0201"
},
{
"name": "node0202"
},
{
"name": "node0203"
}],
"w_data": [{
"name": "node0201",
"value": "100"
},
{
"name": "node0202",
"value": "200"
},
{
"name": "node0203",
"value": "300"
}]
}
}
响应：
{"rw_prot":{"Ver":"1.0.1","dir":"up","id":"123","r_data":[{"name":"node0201","value":"100","err":"0"},{"name":"node0202","value":"200","err":"0"},{"name":"node0203","value":"300","err":"0"}],"w_data":[{"name":"node0201","value":"100","err":"0"},{"name":"node0202","value":"200","err":"0"},{"name":"node0203","value":"300","err":"0"}]}}
14、读4个点位写4个点位：
下发：
{
"rw_prot": {
"Ver": "1.0.1",
"dir": "down",
"id": "123",
"r_data": [{
"name": "node0201"
},
{
"name": "node0202"
},
{
"name": "node0203"
},
{
"name": "node0204"
}],
"w_data": [{
"name": "node0201",
"value": "100"
},
{
"name": "node0202",
"value": "200"
},
{
"name": "node0203",
"value": "300"
},
{
"name": "node0204",
"value": "400"
}]
}
}
响应：
{"rw_prot":{"Ver":"1.0.1","dir":"up","id":"123","r_data":[{"name":"node0201","value":"100","err":"0"},{"name":"node0202","value":"200","err":"0"},{"name":"node0203","value":"300","err":"0"},{"name":"node0204","value":"400","err":"0"}],"w_data":[{"name":"node0201","value":"100","err":"0"},{"name":"node0202","value":"200","err":"0"},{"name":"node0203","value":"300","err":"0"},{"name":"node0204","value":"400","err":"0"}]}}
15、读5个点位写5个点位：
下发：
{
"rw_prot": {
"Ver": "1.0.1",
"dir": "down",
"id": "123",
"r_data": [{
"name": "node0201"
},
{
"name": "node0202"
},
{
"name": "node0203"
},
{
"name": "node0204"
},
{
"name": "node0205"
}],
"w_data": [{
"name": "node0201",
"value": "100"
},
{
"name": "node0202",
"value": "200"
},
{
"name": "node0203",
"value": "300"
},
{
"name": "node0204",
"value": "400"
},
{
"name": "node0205",
"value": "500"
}]
}
}
响应：
{"rw_prot":{"Ver":"1.0.1","dir":"up","id":"123","r_data":[{"name":"node0201","value":"100","err":"0"},{"name":"node0202","value":"200","err":"0"},{"name":"node0203","value":"300","err":"0"},{"name":"node0204","value":"400","err":"0"},{"name":"node0205","value":"500","err":"0"}],"w_data":[{"name":"node0201","value":"100","err":"0"},{"name":"node0202","value":"200","err":"0"},{"name":"node0203","value":"300","err":"0"},{"name":"node0204","value":"400","err":"0"},{"name":"node0205","value":"500","err":"0"}]}}
16、 DO1闭合，DO2断开
下发：
{
"rw_prot": {
"Ver": "1.0.1",
"dir": "down",
"id": "123",
"w_data": [{
"name": "DO1",
"value": "1"
},
{
"name": "DO2",
"value": "0"
}]
}
}
响应：
{"rw_prot":{"Ver":"1.0.1","dir":"up","id":"123","w_data":[{"name":"DO1","value":"1","err":"0"},{"name":"DO2","value":"0","err":"0"}]}}
编写人：马玲玉 编写日期：2024-06-14
审核人：尹丛欣 审核日期：2024-07-04
订正版本：V1.0 订正内容：初稿
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