【发布时间】：2022-07-22 21:47:36
【问题描述】：
这是我的配置文件。我使用的是新配置文件https://thingsboard.io/docs/iot-gateway/config/modbus/[new_modbus.json]，在新的配置文件中，似乎可以在{ master : { "slaves" : [] }}中配置几个不同的设备。当我这样做时，我无法得到正确的结果。
{
"master":{
"slaves":[
{
"unitId":1,
"deviceName":"test1",
"attributesPollPeriod":5000,
"timeseriesPollPeriod":5000,
"sendDataOnlyOnChange":false,
"attributes":[
{
"byteOrder":"BIG",
"tag":"temperature",
"type":"bytes",
"functionCode":3,
"registerCount":1,
"address":1
}
],
"timeseries":[
{
"tag":"distance",
"type":"bytes",
"functionCode":3,
"objectsCount":1,
"address":2
}
],
"attributeUpdates":[
{
"tag":"shared_value_1",
"type":"32uint",
"functionCode":6,
"objectsCount":2,
"address":3
},
{
"tag":"shared_value_2",
"type":"32uint",
"functionCode":6,
"objectsCount":2,
"address":4
}
],
"rpc":[
{
"tag":"bearing_bpfo",
"type":"32uint",
"functionCode":6,
"objectsCount":2,
"address":5
}
],
"host":null,
"port":"/dev/ttyUSB0",
"type":"serial",
"method":"rtu",
"timeout":35,
"byteOrder":"BIG",
"wordOrder":"BIG",
"retries":null,
"retryOnEmpty":null,
"retryOnInvalid":null,
"baudrate":9600,
"pollPeriod":5000,
"connectAttemptCount":1
},
{
"unitId":2,
"deviceName":"Test2",
"attributesPollPeriod":5000,
"timeseriesPollPeriod":5000,
"sendDataOnlyOnChange":false,
"attributes":[
{
"byteOrder":"BIG",
"tag":"temperature",
"type":"bytes",
"functionCode":3,
"registerCount":1,
"address":10
}
],
"timeseries":[
{
"tag":"distance",
"type":"bytes",
"functionCode":3,
"objectsCount":1,
"address":11
}
],
"attributeUpdates":[
{
"tag":"shared_value_1",
"type":"32uint",
"functionCode":6,
"objectsCount":2,
"address":12
}
],
"host":null,
"port":"/dev/ttyUSB0",
"type":"serial",
"method":"rtu",
"timeout":35,
"byteOrder":"BIG",
"wordOrder":"BIG",
"retries":null,
"retryOnEmpty":null,
"retryOnInvalid":null,
"baudrate":9600,
"pollPeriod":5000,
"connectAttemptCount":5
}
]
},
"slave":null
}
我使用的Connector名字是Modbus Connector，我部署的版本信息如下：
操作系统：树莓派
Thingsboard 物联网网关版本：3.0.1
Python 版本：3.9.2
错误回溯：
""2022-05-11 15:28:10" - |DEBUG| - [bytes_modbus_uplink_converter.py] - bytes_modbus_uplink_converter - convert - 87 - datatype: telemetry key: distance value: None"
""2022-05-11 15:28:10" - |DEBUG| - [bytes_modbus_uplink_converter.py] - bytes_modbus_uplink_converter - convert - 92 - {'deviceName': 'testUpdate', 'deviceType': 'default', 'telemetry': [], 'attributes': []}"
""2022-05-11 15:28:10" - |ERROR| - [bytes_modbus_uplink_converter.py] - bytes_modbus_uplink_converter - convert - 83 - Modbus Error: [Input/Output] device reports readiness to read but returned no data (device disconnected or multiple access on port?)"
NoneType: None
""2022-05-11 15:28:10" - |DEBUG| - [bytes_modbus_uplink_converter.py] - bytes_modbus_uplink_converter - convert - 87 - datatype: telemetry key: distance value: None"
""2022-05-11 15:28:10" - |DEBUG| - [bytes_modbus_uplink_converter.py] - bytes_modbus_uplink_converter - convert - 92 - {'deviceName': 'RpcTest', 'deviceType': 'default', 'telemetry': [], 'attributes': []}"
""2022-05-11 15:28:10" - |ERROR| - [bytes_modbus_uplink_converter.py] - bytes_modbus_uplink_converter - convert - 83 - Modbus Error: [Input/Output] device reports readiness to read but returned no data (device disconnected or multiple access on port?)"
NoneType: None
【问题讨论】：
-
您好，欢迎来到 SO。一些问题：您真的有两个具有正确 ID（1 和 2）的从站连接到您的
/dev/ttyUSB0串行端口吗？您是否检查过它们是否正确接线？什么是奴隶？你确定你正在阅读的地址是正确的，而你正在写的地址没有受到保护？ -
@Marcos G. 感谢您的回复。这个问题我已经解决了。
标签： modbus thingsboard-gateway