Update README

README.md

@@ -19,9 +19,7 @@ $ pip install -r requirements.txt
 # Usage
 ```bash
 $ ./print.py --help
-usage: print.py [-h] [-l {debug,info,warn,error}]
-                [-b {mean-threshold,floyd-steinberg,halftone,none}] [-s]
-                [-d DEVICE] [-t]
+usage: print.py [-h] [-l {debug,info,warn,error}] [-b {mean-threshold,floyd-steinberg,atkinson,halftone,none}] [-s] [-d DEVICE] [-e ENERGY]
                 filename
 
 prints an image on your cat thermal printer
@@ -33,19 +31,15 @@ options:
   -h, --help            show this help message and exit
   -l {debug,info,warn,error}, --log-level {debug,info,warn,error}
   -b {mean-threshold,floyd-steinberg,atkinson,halftone,none}, --img-binarization-algo {mean-threshold,floyd-steinberg,atkinson,halftone,none}
-                        Which image binarization algorithm to use. If 'none'
-                        is used, no binarization will be used. In this case
-                        the image has to have a width of 384 px.
-  -s, --show-preview    If set, displays the final image and asks the user for
-                        confirmation before printing.
+                        Which image binarization algorithm to use. If 'none' is used, no binarization will be used. In this case the image has to
+                        have a width of 384 px.
+  -s, --show-preview    If set, displays the final image and asks the user for confirmation before printing.
   -d DEVICE, --device DEVICE
-                        The printer's Bluetooth Low Energy (BLE) address (MAC
-                        address on Linux; UUID on macOS) or advertisement name
-                        (e.g.: "GT01", "GB02", "GB03"). If omitted, the the
-                        script will try to auto discover the printer based on
-                        its advertised BLE services.
-  -t, --darker          Print the image in text mode. This leads to more
-                        contrast, but slower speed.
+                        The printer's Bluetooth Low Energy (BLE) address (MAC address on Linux; UUID on macOS) or advertisement name (e.g.:
+                        "GT01", "GB02", "GB03"). If omitted, the the script will try to auto discover the printer based on its advertised BLE
+                        services.
+  -e ENERGY, --energy ENERGY
+                        Thermal energy. Between 0x0000 (light) and 0xffff (darker, default).
 ```
 
 # Example

print.py

@@ -36,7 +36,7 @@ def parse_args():
                           'the printer based on its advertised BLE services.'
                       ))
     args.add_argument('-e', '--energy', type=lambda h: int(h.removeprefix("0x"), 16),
-                      help="Thermal energy. Between 0x0000 (light) and 0xffff (darker)",
+                      help="Thermal energy. Between 0x0000 (light) and 0xffff (darker, default).",
                       default="0xffff")
     return args.parse_args()