Install

pip install mwrsync

On your device, enable WebREPL by running import webrepl_setup or adding this to your boot.py:

import webrepl
webrepl.start(password='secret')

Usage

mwrsync <directory> <host>[:<port>] [--port <int>] [-p|--password <value>] [--dry_run] [-v|--verbose]

Example:

$ mwrsync esp32/ 10.0.0.128 -v
Password:
Remote WebREPL version: (1, 19, 1)
copying: test.py
Sent 5 of 5 bytes

--dry-run will compute changes but not modify the files on the device. --verbose will tell you what it’s doing.

Ignoring Files

Add a file .mwrsyncignore to the directory you’re syncing. It follows .gitignore syntax. It will neither copy or delete files that match.

WARNING: If you set up WebREPL with import webrepl_setup, don’t forget to add webrepl_cfg.py to .mwrsyncignore (or copy it to your project directory). Otherwise you’ll disable WebREPL on your next reset.

Speed

On an ESP32 this will hash files at about 272kb/s (on the device). It will transfer changed files at about 110kb/s. Most of the time a sync takes me about 4 seconds.

How It Works

This tool will compute a SHA1 hash of your local files, a SHA1 hash of any files on your device, and copy or remove files until the two match. It only ever modifies files on the device, never locally.

Security

WebREPL sends everything over clear-text (including the password 😓).