Write settings to nvs when changing from the setting screen

Otherwise, settings may not actually be saved if the device crashes/
reboots unexpectedly.

Fixes #148

1 files changed, 4 insertions, 0 deletions

diff --git a/lua/settings.lua b/lua/settings.lua
index 8547aa19..9018d884 100644
--- a/lua/settings.lua
+++ b/lua/settings.lua
@@ -13,6 +13,7 @@ local usb = require("usb")
 local font = require("font")
 local main_menu = require("main_menu")
 local img = require("images")
+local nvs = require("nvs")
 
 local settings = {}
 
@@ -33,6 +34,9 @@ local SettingsScreen = widgets.MenuScreen:new {
       pad_left = 4,
       pad_right = 4,
     }
+  end,
+  on_hide = function(self)
+    nvs.write();
   end
 }