On macOS and linux, these commands must be entered at the shell.
On Windows the Windows Subsystem for Linux (WSL) must be started
by entering "wsl" at the start menu and this will open a shell.

Most systems already have python3 installed, but if this is not
the case then use the standard procedure to install it, for example:

$ brew install python3                # macOS

$ sudo apt-get install python3        # Ubuntu linux or Windows + WSL
$ sudo apt-get install python3-pip

Then install the dependencies (all platforms):

$ pip3 install pyserial
$ pip3 install adafruit-ampy
$ export PATH=~/.local/bin:$PATH      # this line needed on Windows + WSL to access ampy

Then clone this repository with:

$ git clone [email protected]:udem-dlteam/bulk-upload-firmware
$ cd bulk-upload-firmware

When the script bulk-upload-firmware.sh is first executed it will
install the esptool required for flashing the device.

$ ./bulk_upload_firmware.sh --id "TTGO213"  # upload default firmware to single device

$ ./bulk_upload_firmware.sh --firmware micropython  # bulk upload of micropython firmware

$ ./bulk_upload_firmware.sh --config "ssid='mywifi'\npwd='mywifipw'"  # bulk upload of default firmware

--port <port>      Select specific serial port. If this option is not
                   specified the script will continuously scan all the
                   USB ports for new connections, and the uploads will
                   be done concurrently (useful for bulk uploading).

--dir <dir>        Select a directory that contains the available
                   firmware.  Defaults to the "firmware" subdirectory.

--firmware <name>  Select a specific firmware from the firmware
                   directory.  Defaults to "default".

--id <id>          Select an id for the device.  If <id> does not contain
                   a "#" then it will be assigned to the device and the
                   program will exit after the upload.  If the id contains
                   one or more contiguous "#" then it is a template for
                   generating ids. Each "#" will be replaced by a digit.
                   Defaults to "DEV#".

--start <N>        The starting sequence number. Defaults to 0.

--config <config>  Python code to add to generated _config.py file.
                   Any "\n" is replaced with a newline.