Update command syntax for esptool usage (#286)

write_flash has been replaced with write-flash, erase_flash has been replaced with erase-flash, and -port has been replaced with --port and must not go immeidately after the executable or before the write-flash.

Author: tomcollis

docs/basics/install-binary.md

@@ -23,13 +23,13 @@ This installer is not yet available for ESPs with flash chips smaller than 4MB (
 
 - First of all, please follow the steps to install esptool.py [here](https://github.com/espressif/esptool).
 - Download the latest [release binary](https://github.com/Aircoookie/WLED/releases) file!
-- Make sure only one ESP device/microcontroller is connected to your computer! Otherwise you could accidentally overwrite the wrong one. If you know the serial port, you can also add the `-port COM3` attribute after `write_flash`
+- Make sure only one ESP device/microcontroller is connected to your computer! Otherwise you could accidentally overwrite the wrong one. If you know the serial port, you can also add the `--port COM3` attribute before `write_flash`
 - Execute this command:
 
 #### ESP8266
 
 ```bash
-esptool.py write_flash 0x0 ./WLED_XXX.bin
+esptool.py write-flash 0x0 ./WLED_XXX.bin
 ```
 
 #### ESP32
@@ -38,21 +38,21 @@ Firstly, flash the version 4 bootloader file, which you can find [here](https://
 This step only has to be done once, to update afterwards the bootloader does not have to be re-installed.
 
 ```bash
-esptool.py write_flash 0x0 ./esp32_bootloader_v4.bin
+esptool.py write-flash 0x0 ./esp32_bootloader_v4.bin
 ```
 
 Now you can flash the actual firmware binary. Keep in mind the bootloader needs to have a flash offset of 0, but the firmware 0x10000.
 
 ```bash
-esptool.py write_flash 0x10000 ./WLED_XXX.bin 
+esptool.py write-flash 0x10000 ./WLED_XXX.bin 
 ```
 
 When esptool.py says `Connecting...`, some ESP32 boards require you to hold the boot button (to the right of the USB port) for a few seconds  
 
 - If you experience issues, run this command before trying `write_flash` again (Note: this will erase all settings stored on the ESP!)
 
 ```bash
-esptool.py erase_flash
+esptool.py erase-flash
 ```
 
 If you have a MagicHome controller, here is a [good video tutorial](https://www.youtube.com/watch?v=qgBAU39v07k) on how to flash it.