grpc-modbus

This project demonstrates how to expose modbus TCP/IP data to a network via Get and Set gRPC interfaces.

The key of a request is expected to be of the format: modbus://{device_address}:{port}/read-registers/{address}?type=f.

Common files

Implmenting a driver requires implementing the Get and Set methods of the DeviceControl service.

• common.proto for references. Defines the DeviceControl service and its requirement methods in the Protocol Buffer language.
• src/common_pb2_grpc.py provides the server stubs to extend.
• src/common_pb2.pyi provices the messages classes used for requests and responses.

Testing

To run tests don't forget to activate venv: e.g., source ./venv/bin/activate

Example

To run a specific test try something like: python -m unittest -v tests.test_server

Output should look like:

...
modbus://{ip}:502/read-registers/16384?type=f -> 59.944000244140625
modbus://{ip}:502/read-registers/16386?type=f -> 118.87457275390625
modbus://{ip}:502/read-registers/16402?type=f -> 0.020628824830055237
modbus://{ip}:502/read-registers/16412?type=f -> 0.9188230037689209
ok

----------------------------------------------------------------------
Ran 1 test in 1.396s