example: add example script

Signed-off-by: YoungSoo Shin <shinys000114@gmail.com>

example/logger/README.md

@@ -0,0 +1,32 @@
+# Power Consumption Logger Example
+
+Based on this script, you can monitor power consumption and implement graph plotting.
+
+## How to Run the Script
+
+### Install Python Virtual Environment
+
+```shell
+sudo apt install virtualenv
+virtualenv venv
+source venv/bin/activate
+```
+
+### Install require package
+
+```shell
+pip install grpcio-tools requests websockets protobuf
+```
+
+### Build `status_pb2.py`
+
+```shell
+python -m grpc_tools.protoc -I ../../proto --python_out=. status.proto
+```
+
+### Execute script
+
+```shell
+# python3 logger.py -u <username> -p <password> <address>
+python3 logger.py -u admin -p password 192.168.30.5
+```