Adolfo Reyna
72 lines
2.7 KiB
Python
72 lines
2.7 KiB
Python
#!/usr/bin/env python3
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import sys
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import json
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import urllib.request
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import argparse
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def main():
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parser = argparse.ArgumentParser(description="MCP Stdio-to-HTTP Bridge for ESP32-S3-RLCD-4.2")
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parser.add_argument("--ip", required=True, help="IP address of the ESP32 board (e.g. 192.168.1.123)")
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parser.add_argument("--port", type=int, default=80, help="Port the MCP server is listening on (default 80)")
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args = parser.parse_args()
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url = f"http://{args.ip}:{args.port}/api/mcp"
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sys.stderr.write(f"ESP32 MCP Stdio-to-HTTP Bridge started. Routing stdio to {url}\n")
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sys.stderr.flush()
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# Sits in loop reading stdio requests from LLM client and routing them to ESP32
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while True:
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try:
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line = sys.stdin.readline()
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if not line:
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break
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# Parse request to ensure it's valid JSON
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req_data = json.loads(line.strip())
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# Forward the JSON-RPC request to the ESP32 board via HTTP POST
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req = urllib.request.Request(
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url,
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data=json.dumps(req_data).encode("utf-8"),
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headers={"Content-Type": "application/json"},
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method="POST"
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)
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with urllib.request.urlopen(req, timeout=10.0) as response:
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resp_data = response.read().decode("utf-8")
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# Write the response back to stdio for the LLM client
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sys.stdout.write(resp_data + "\n")
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sys.stdout.flush()
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except urllib.error.URLError as e:
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# Send standard JSON-RPC internal error response
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err_resp = {
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"jsonrpc": "2.0",
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"error": {
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"code": -32000,
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"message": f"Bridge failed to reach ESP32: {e.reason}"
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},
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"id": req_data.get("id") if "req_data" in locals() else None
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}
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sys.stdout.write(json.dumps(err_resp) + "\n")
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sys.stdout.flush()
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sys.stderr.write(f"Bridge error: Failed to connect to ESP32 at {url}: {e}\n")
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sys.stderr.flush()
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except Exception as e:
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err_resp = {
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"jsonrpc": "2.0",
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"error": {
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"code": -32603,
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"message": f"Bridge Internal Error: {str(e)}"
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},
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"id": req_data.get("id") if "req_data" in locals() else None
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}
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sys.stdout.write(json.dumps(err_resp) + "\n")
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sys.stdout.flush()
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sys.stderr.write(f"Bridge error: {e}\n")
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sys.stderr.flush()
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if __name__ == "__main__":
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main()
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