Trying to use api to send the RPC command and getting the server_side_rpc_handler error.[HELP]

[Vaghulkumar95]

Describe the issue Create description about your issue, and your actions to solve it. We are trying to change the value Feedback_Source_Select via the api https://thingsboard.cloud:443/api/plugins/rpc/twoway/5de2aaa0-4d90-11ef-847b-9766e2a793fa Sometimes we are getting the 408 Timeout request Sometimes we are getting the 409 Conflict After restarting thingsboard it is okay. Can you please help us understand why we are unable to send RPC requests successfully?

Configuration (Attach your configuration file) Notate: Remove Access token from file if you want to attach a tb_gateway.yaml config.txt

Connector name (If you need help with some connector/converter): [e.g. MQTT Connector]

Error traceback (If it was raised):

Traceback (most recent call last):
File "/usr/local/lib/python3.10/site-packages/thingsboard_gateway/connectors/modbus/modbus_connector.py", line 652, in server_side_rpc_handler
device = ModbusConnector.__get_device_by_name(server_rpc_request[DEVICE_SECTION_PARAMETER],
File "/usr/local/lib/python3.10/site-packages/thingsboard_gateway/connectors/modbus/modbus_connector.py", line 763, in __get_device_by_name
return tuple(filter(lambda slave: slave.device_name == device_name, devices))[0]

Versions (please complete the following information):

• OS: [Debian 11]
• Thingsboard IoT Gateway version [3.5.1]
• Python version [Python 3.10.12]

[Vaghulkumar95]

Hi @samson0v @imbeacon , For the same hub I'm getting the below errors now. File "/usr/local/lib/python3.10/site-packages/thingsboard_gateway/connectors/modbus/modbus_connector.py", line 590, in fun> value=config[PAYLOAD_PARAMETER], KeyError: 'payload' 10:02:45 ERROR tb_logger:127 'payload' Traceback (most recent call last): File "/usr/local/lib/python3.10/site-packages/thingsboard_gateway/connectors/modbus/modbus_connector.py", line 405, in pro> input_data = self.__function_to_device(device, current_data) File "/usr/local/lib/python3.10/site-packages/thingsboard_gateway/connectors/modbus/modbus_connector.py", line 590, in __fun> value=config[PAYLOAD_PARAMETER], KeyError: 'payload'

Started ThingsBoard Gateway. 14:54:14 ERROR tb_logger:127 'config' Traceback (most recent call last): File "/usr/local/lib/python3.10/site-packages/thingsboard_gateway/gateway/tb_gateway_service.py", line 589, in init_remote> self.__remote_configurator = RemoteConfigurator(self, self.config) File "/usr/local/lib/python3.10/site-packages/thingsboard_gateway/tb_utility/tb_gateway_remote_configurator.py", line 42, in> self._load_connectors_configuration() File "/usr/local/lib/python3.10/site-packages/thingsboard_gateway/tb_utility/tb_gateway_remote_configurator.py", line 180, i> config = connector.pop('config')[general_connector_config['configuration']] KeyError: 'config'

the hub was collecting the data fine and suddenly we got these errors. Can you also explain what is wrong here?

[Vaghulkumar95]

Hi @samson0v @imbeacon , Just wanted to follow up, do you have any updates on this above? And I also wanted to check, if I have telemetry data how to use the the inbuilt get and set methods. Here I checked there is a line specified how to use get and set but it is not elaborate for modbus. https://thingsboard.io/docs/iot-gateway/config/modbus/ Also, every telemetry and attribute parameter has built-in GET and SET RPC methods out of the box, so you don’t need to configure it manually. To use them, make sure you set all required parameters (in the case of Modbus Connector, these are the following: type, functionCode, objectsCount, address). See the guide.

I tried to use get and set for the values which I have in telemetry and it is giving a timeout. But the rpc methods work fine. Can you please help with this request as well?

[Vaghulkumar95]

Hi @samson0v @imbeacon, Do we have any updates on this?

[Vaghulkumar95]

Hi @samson0v @imbeacon ,

We are getting the below error, Can you please check on this ?

File "/usr/local/lib/python3.10/site-packages/thingsboard_gateway/connectors/modbus/bytes_modbus_uplink_converter.py", line> decoded_data = self.decode_from_registers(decoder, configuration) File "/usr/local/lib/python3.10/site-packages/thingsboard_gateway/connectors/modbus/bytes_modbus_uplink_converter.py", line> decoded = decoder_functions[lower_type]() File "/root/.local/lib/python3.10/site-packages/pymodbus/payload.py", line 403, in decode_32bit_uint handle = self._unpack_words(fstring, handle) File "/root/.local/lib/python3.10/site-packages/pymodbus/payload.py", line 359, in _unpack_words handle = unpack(f"!{wc_value}H", handle) struct.error: unpack requires a buffer of 4 bytes