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micropython ESP32 UART to TCP bridge

A micropython server running on an ESP32 which acts as a bridge between UART and TCP (LAN/WLAN).

Installation

Follow steps to install esptool and micropython for ESP32.

Then...

  • clone me, oh please, clone me!
$ git clone git@github.com/tiagocoutinho/us2n
  • Create a file called us2n.json with a json configuration:
import json

config = {
    "name": "SuperESP32",
    "verbose": False,
    "wlan": {
        "sta": {
            "essid": "<name of your access point>",
            "password": "<password of your access point>",
        },
    },
    "bridges": [
        {
            "tcp": {
                "bind": ["", 8000],
            },
            "uart": {
                "port": 1,
                "baudrate": 9600,
                "bits": 8,
                "parity": None,
                "stop": 1,
            },
        },
    ],
}

with open('us2n.json', 'w') as f:
    json.dump(config, f)
  • Include in your main.py:
import us2n
server = us2n.server()
server.serve_forever()
  • Load the newly created us2n.json to your ESP32

  • Load us2n.py to your ESP32

  • Load main.py to your ESP32

  • Press reset

The server board should be ready to accept requests in a few seconds.

Usage

Now, if, for example, your ESP32 UART is connected to a SCPI device, you can, from any PC:

$ nc <ESP32 Wifi IP> 8000
*IDN?
ACME Instruments, C4, 122393-2, 10-0-1

That's all folks!

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micropython bridge between UART and TCP for the ESP32

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