Update readme with installation instructions

README.md

@@ -40,6 +40,28 @@ Adding support for LMS6 (see issue #48) and ims100 (see branch ims100) could be
 but currently I don't have plans to do add this myself. Well-tested pull requests will of
 course be considered for inclusion :-).
 
+## Installation
+
+You can download the latest binary automated build for the development and testing branches [here](http://rdzsonde.mooo.com/download.html), the binary includes everything including configuration files so any existing settings will be reset. 
+
+To update an existing installatiom to the latest development or master version you can use the [OTA](https://github.com/dl9rdz/rdz_ttgo_sonde/wiki/Other-features#over-the-air-updates) update feature.
+
+The downloaded .bin file can be flashed to your ESP32 board using [esptool](https://github.com/espressif/esptool) or [ESP32 Download Tool](https://www.espressif.com/en/support/download/other-tools)
+
+### esptool
+
+You can run the following command replacing `<filename.bin>` with the path to the downloaded .bin file. 
+
+If you encounter errors with the device COM not automatically being detected replace `/dev/cu.SLAB_USBtoUART` with `COM<X>`.
+
+```
+esptool --chip esp32 --port /dev/cu.SLAB_USBtoUART --baud 921600 --before default_reset --after hard_reset write_flash -z --flash_mode dio --flash_freq 80m --flash_size detect 0x1000 <filename.bin>
+```
+
+### ESP32 Download Tool
+
+The binary file can also be installed using the GUI application with the [following](http://rdzsonde.mooo.com/) settings.
+
 ## Button commands
 
 You can use the button on the board (not the reset button, the second one) to