Add Windows GUI to firmware update readme

Author: nseidle

Binaries/readme.md

@@ -1,4 +1,17 @@
-This folder contains the various firmware versions for RTK Products (Surveyor, Express, Express+, and Facet). Each binary is created by exporting a sketch binary from Arduino. The sketch binary is then uploaded to the ESP32 along with boot_app0.bin, RTK_Surveyor.ino.bootloader.bin, and RTK_Surveyor.ino.partitions.bin. You can update the firmware on a device by loading a binary onto the SD card and inserting it into the RTK Surveyor (see more information [here](https://learn.sparkfun.com/tutorials/sparkfun-rtk-surveyor-hookup-guide/firmware-updates-and-customization)) or by using the following CLI:
+This folder contains the various firmware versions for RTK Products (Surveyor, Express, Express+, and Facet). 
+
+Updating the firmware can be achieved by using one of the following methods:
+
+* Load the firmware on an SD card, then use a serial terminal with *Firmware Upgrade* menu
+* Load the firmware over WiFi when the device is in WiFi AP Config Mode
+* Use the [Windows GUI](https://github.com/sparkfun/SparkFun_RTK_Firmware/Uploader_GUI) and a USB cable. (This method is python based which can also be used on Linux, Mac OS, and Raspberry Pi)
+* Use the command line *batch_program.bat* (see below)
+
+The SD method is generally recommended. For more information see [here](https://learn.sparkfun.com/tutorials/sparkfun-rtk-surveyor-hookup-guide/firmware-updates-and-customization).
+
+Each binary is created by exporting a sketch binary from Arduino. The sketch binary is then uploaded to the ESP32 along with boot_app0.bin, RTK_Surveyor.ino.bootloader.bin, and RTK_Surveyor.ino.partitions.bin. You can update the firmware on a device by loading a binary onto the SD card and inserting it into the RTK Surveyor ) or by using the included 'batch_program.bat' along with the binary file name and COM port. For example *batch_program.bat RTK_Surveyor_Firmware_v2_0.bin COM3*.
+
+The batch file runs the following commands:
 
 esptool.exe --chip esp32 --port COM4 --baud 921600 --before default_reset --after hard_reset write_flash -z --flash_mode dio --flash_freq 80m --flash_size detect 0x1000 ./bin/RTK_Surveyor.ino.bootloader.bin 0x8000 ./bin/RTK_Surveyor.ino.partitions.bin 0xe000 ./bin/boot_app0.bin 0x10000 ./RTK_Surveyor_Firmware_vxx.bin