Update README.md

examples/ggwave-to-file/README.md

@@ -1,7 +1,49 @@
 ## ggwave-to-file
 
-Output generated waveform to a file.
+Output a generated waveform to a file.
 
 ```bash
 echo "Hello World!" | ./bin/ggwave-to-file > example.wav
 ```
+
+Based on this tool, there is a REST service available on the following link: https://ggwave.ggerganov.com/ggwave-to-file.php
+
+You can use it to query audio waveforms for different text messages.
+
+### curl:
+
+```bash
+curl https://ggwave.ggerganov.com/ggwave-to-file.php?m=Hello --output hello.wav
+```
+
+### python
+
+```python
+import sys
+import requests
+
+def ggwave(message: str, protocolId: int = 1):
+
+    url = 'https://ggwave.ggerganov.com/ggwave-to-file.php'
+
+    params = {
+        'm': message,       # message to encode
+        'p': protocolId,    # transmission protocol to use
+    }
+
+    response = requests.get(url, params=params)
+
+    if response == '':
+        raise SyntaxError('Request failed')
+
+    return response
+
+...
+
+# query waveform from server
+result = ggwave("Hello world!")
+
+# dump wav file to stdout
+sys.stdout.buffer.write(result.content)
+
+```