diff --git a/server-api/app.js b/server-api/app.js
new file mode 100644
index 0000000..5f5e7d7
--- /dev/null
+++ b/server-api/app.js
@@ -0,0 +1,45 @@
+const koa = require('koa');
+const path = require('path');
+const fs = require('fs');
+
+// Koa Middleware
+const session = require('koa-session');
+const Router = require('koa-router');
+const koaBody = require('koa-body');
+const koaStatic = require('koa-static');
+const cors = require('kcors');
+
+// Koa Main Application
+const app = new koa();
+
+const server = app.listen(3000, () => {
+    console.log(`Server start on port ${server.address().port}`);
+});
+
+// Root Router
+const router = new Router();
+
+// enable body parser
+app.use(koaBody({
+    multipart: true,
+    // upload file size 10mb
+    maxFieldSize: 10 * 1024 * 1024
+}));
+// enable cors
+app.use(cors());
+// enable static file 
+app.use(koaStatic(path.resolve(__dirname, 'public')));
+// enable session
+app.use(session({
+    key: 'koa:sess',
+    maxAge: 86400000,
+    overwrite: true,
+    httpOnly: true,
+    signed: true
+}, app));
+app.use(router.routes());
+app.use(router.allowedMethods());
+
+router.get('/', async(c, n) => {
+    c.body = 'Get root';
+});
\ No newline at end of file
diff --git a/server-api/package.json b/server-api/package.json
new file mode 100644
index 0000000..6f77f95
--- /dev/null
+++ b/server-api/package.json
@@ -0,0 +1,15 @@
+{
+  "name": "lora-server-api",
+  "version": "1.0.0",
+  "main": "app.js",
+  "author": "UrWind",
+  "license": "MIT",
+  "dependencies": {
+    "kcors": "2",
+    "koa": "^2.2.0",
+    "koa-body": "^2.0.1",
+    "koa-router": "^7.2.0",
+    "koa-session": "^5.0.0",
+    "koa-static": "^3.0.0"
+  }
+}
diff --git a/server-api/yarn.lock b/server-api/yarn.lock
new file mode 100644
index 0000000..25e480e
--- /dev/null
+++ b/server-api/yarn.lock
@@ -0,0 +1,361 @@
+# THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
+# yarn lockfile v1
+
+
+accepts@^1.2.2:
+  version "1.3.3"
+  resolved "https://registry.yarnpkg.com/accepts/-/accepts-1.3.3.tgz#c3ca7434938648c3e0d9c1e328dd68b622c284ca"
+  dependencies:
+    mime-types "~2.1.11"
+    negotiator "0.6.1"
+
+any-promise@^1.0.0, any-promise@^1.1.0:
+  version "1.3.0"
+  resolved "https://registry.yarnpkg.com/any-promise/-/any-promise-1.3.0.tgz#abc6afeedcea52e809cdc0376aed3ce39635d17f"
+
+bytes@2.4.0:
+  version "2.4.0"
+  resolved "https://registry.yarnpkg.com/bytes/-/bytes-2.4.0.tgz#7d97196f9d5baf7f6935e25985549edd2a6c2339"
+
+co-body@*:
+  version "5.1.1"
+  resolved "https://registry.yarnpkg.com/co-body/-/co-body-5.1.1.tgz#d97781d1e3344ba4a820fd1806bddf8341505236"
+  dependencies:
+    inflation "^2.0.0"
+    qs "^6.4.0"
+    raw-body "^2.2.0"
+    type-is "^1.6.14"
+
+co@^4.6.0:
+  version "4.6.0"
+  resolved "https://registry.yarnpkg.com/co/-/co-4.6.0.tgz#6ea6bdf3d853ae54ccb8e47bfa0bf3f9031fb184"
+
+content-disposition@~0.5.0:
+  version "0.5.2"
+  resolved "https://registry.yarnpkg.com/content-disposition/-/content-disposition-0.5.2.tgz#0cf68bb9ddf5f2be7961c3a85178cb85dba78cb4"
+
+content-type@^1.0.0:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/content-type/-/content-type-1.0.2.tgz#b7d113aee7a8dd27bd21133c4dc2529df1721eed"
+
+cookies@~0.7.0:
+  version "0.7.0"
+  resolved "https://registry.yarnpkg.com/cookies/-/cookies-0.7.0.tgz#0bc961d910c35254980fc7c9eff5da12011bbf00"
+  dependencies:
+    depd "~1.1.0"
+    keygrip "~1.0.1"
+
+crc@^3.4.4:
+  version "3.4.4"
+  resolved "https://registry.yarnpkg.com/crc/-/crc-3.4.4.tgz#9da1e980e3bd44fc5c93bf5ab3da3378d85e466b"
+
+debug@*, debug@^2.2.0, debug@^2.6.0:
+  version "2.6.8"
+  resolved "https://registry.yarnpkg.com/debug/-/debug-2.6.8.tgz#e731531ca2ede27d188222427da17821d68ff4fc"
+  dependencies:
+    ms "2.0.0"
+
+deep-equal@~1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/deep-equal/-/deep-equal-1.0.1.tgz#f5d260292b660e084eff4cdbc9f08ad3247448b5"
+
+delegates@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/delegates/-/delegates-1.0.0.tgz#84c6e159b81904fdca59a0ef44cd870d31250f9a"
+
+depd@1.1.0, depd@^1.1.0, depd@~1.1.0:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/depd/-/depd-1.1.0.tgz#e1bd82c6aab6ced965b97b88b17ed3e528ca18c3"
+
+destroy@^1.0.3:
+  version "1.0.4"
+  resolved "https://registry.yarnpkg.com/destroy/-/destroy-1.0.4.tgz#978857442c44749e4206613e37946205826abd80"
+
+ee-first@1.1.1:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/ee-first/-/ee-first-1.1.1.tgz#590c61156b0ae2f4f0255732a158b266bc56b21d"
+
+error-inject@~1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/error-inject/-/error-inject-1.0.0.tgz#e2b3d91b54aed672f309d950d154850fa11d4f37"
+
+escape-html@~1.0.1:
+  version "1.0.3"
+  resolved "https://registry.yarnpkg.com/escape-html/-/escape-html-1.0.3.tgz#0258eae4d3d0c0974de1c169188ef0051d1d1988"
+
+formidable@1.0.17:
+  version "1.0.17"
+  resolved "https://registry.yarnpkg.com/formidable/-/formidable-1.0.17.tgz#ef5491490f9433b705faa77249c99029ae348559"
+
+fresh@^0.5.0:
+  version "0.5.0"
+  resolved "https://registry.yarnpkg.com/fresh/-/fresh-0.5.0.tgz#f474ca5e6a9246d6fd8e0953cfa9b9c805afa78e"
+
+http-assert@^1.1.0:
+  version "1.3.0"
+  resolved "https://registry.yarnpkg.com/http-assert/-/http-assert-1.3.0.tgz#a31a5cf88c873ecbb5796907d4d6f132e8c01e4a"
+  dependencies:
+    deep-equal "~1.0.1"
+    http-errors "~1.6.1"
+
+http-errors@^1.2.8, http-errors@^1.3.1, http-errors@~1.6.1:
+  version "1.6.1"
+  resolved "https://registry.yarnpkg.com/http-errors/-/http-errors-1.6.1.tgz#5f8b8ed98aca545656bf572997387f904a722257"
+  dependencies:
+    depd "1.1.0"
+    inherits "2.0.3"
+    setprototypeof "1.0.3"
+    statuses ">= 1.3.1 < 2"
+
+http-errors@~1.5.0:
+  version "1.5.1"
+  resolved "https://registry.yarnpkg.com/http-errors/-/http-errors-1.5.1.tgz#788c0d2c1de2c81b9e6e8c01843b6b97eb920750"
+  dependencies:
+    inherits "2.0.3"
+    setprototypeof "1.0.2"
+    statuses ">= 1.3.1 < 2"
+
+iconv-lite@0.4.15:
+  version "0.4.15"
+  resolved "https://registry.yarnpkg.com/iconv-lite/-/iconv-lite-0.4.15.tgz#fe265a218ac6a57cfe854927e9d04c19825eddeb"
+
+inflation@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/inflation/-/inflation-2.0.0.tgz#8b417e47c28f925a45133d914ca1fd389107f30f"
+
+inherits@2.0.3:
+  version "2.0.3"
+  resolved "https://registry.yarnpkg.com/inherits/-/inherits-2.0.3.tgz#633c2c83e3da42a502f52466022480f4208261de"
+
+is-generator-function@^1.0.3:
+  version "1.0.6"
+  resolved "https://registry.yarnpkg.com/is-generator-function/-/is-generator-function-1.0.6.tgz#9e71653cd15fff341c79c4151460a131d31e9fc4"
+
+isarray@0.0.1:
+  version "0.0.1"
+  resolved "https://registry.yarnpkg.com/isarray/-/isarray-0.0.1.tgz#8a18acfca9a8f4177e09abfc6038939b05d1eedf"
+
+kcors@2:
+  version "2.2.1"
+  resolved "https://registry.yarnpkg.com/kcors/-/kcors-2.2.1.tgz#7160a94f2eae633436d2cef8eadd0ce232386779"
+
+keygrip@~1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/keygrip/-/keygrip-1.0.1.tgz#b02fa4816eef21a8c4b35ca9e52921ffc89a30e9"
+
+koa-body@^2.0.1:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/koa-body/-/koa-body-2.0.1.tgz#87a171d5f8d74b354e7d68abf3ad510999b15ce3"
+  dependencies:
+    co-body "*"
+    formidable "1.0.17"
+
+koa-compose@^3.0.0:
+  version "3.2.1"
+  resolved "https://registry.yarnpkg.com/koa-compose/-/koa-compose-3.2.1.tgz#a85ccb40b7d986d8e5a345b3a1ace8eabcf54de7"
+  dependencies:
+    any-promise "^1.1.0"
+
+koa-convert@^1.2.0:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/koa-convert/-/koa-convert-1.2.0.tgz#da40875df49de0539098d1700b50820cebcd21d0"
+  dependencies:
+    co "^4.6.0"
+    koa-compose "^3.0.0"
+
+koa-is-json@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/koa-is-json/-/koa-is-json-1.0.0.tgz#273c07edcdcb8df6a2c1ab7d59ee76491451ec14"
+
+koa-router@^7.2.0:
+  version "7.2.0"
+  resolved "https://registry.yarnpkg.com/koa-router/-/koa-router-7.2.0.tgz#cb35ba94fee2614d39736b7fa5381681b7aaf78c"
+  dependencies:
+    debug "^2.2.0"
+    http-errors "^1.3.1"
+    koa-compose "^3.0.0"
+    methods "^1.0.1"
+    path-to-regexp "^1.1.1"
+
+koa-send@^3.2.0:
+  version "3.3.0"
+  resolved "https://registry.yarnpkg.com/koa-send/-/koa-send-3.3.0.tgz#5a4ae245564680c6ecf6079e9275fa5173a861dc"
+  dependencies:
+    co "^4.6.0"
+    debug "^2.6.0"
+    mz "^2.3.1"
+    resolve-path "^1.3.1"
+
+koa-session@^5.0.0:
+  version "5.0.0"
+  resolved "https://registry.yarnpkg.com/koa-session/-/koa-session-5.0.0.tgz#7f1f9392df6c8a792901ecfbfaa1f88a084c6d2a"
+  dependencies:
+    crc "^3.4.4"
+    debug "^2.2.0"
+    uid-safe "^2.1.3"
+
+koa-static@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/koa-static/-/koa-static-3.0.0.tgz#40442233d2c0b35c225e450199c10bf8a539e416"
+  dependencies:
+    debug "*"
+    koa-send "^3.2.0"
+
+koa@^2.2.0:
+  version "2.2.0"
+  resolved "https://registry.yarnpkg.com/koa/-/koa-2.2.0.tgz#b055933187849d540ad8b9f731baaa4be97c652d"
+  dependencies:
+    accepts "^1.2.2"
+    content-disposition "~0.5.0"
+    content-type "^1.0.0"
+    cookies "~0.7.0"
+    debug "*"
+    delegates "^1.0.0"
+    depd "^1.1.0"
+    destroy "^1.0.3"
+    error-inject "~1.0.0"
+    escape-html "~1.0.1"
+    fresh "^0.5.0"
+    http-assert "^1.1.0"
+    http-errors "^1.2.8"
+    is-generator-function "^1.0.3"
+    koa-compose "^3.0.0"
+    koa-convert "^1.2.0"
+    koa-is-json "^1.0.0"
+    mime-types "^2.0.7"
+    on-finished "^2.1.0"
+    only "0.0.2"
+    parseurl "^1.3.0"
+    statuses "^1.2.0"
+    type-is "^1.5.5"
+    vary "^1.0.0"
+
+media-typer@0.3.0:
+  version "0.3.0"
+  resolved "https://registry.yarnpkg.com/media-typer/-/media-typer-0.3.0.tgz#8710d7af0aa626f8fffa1ce00168545263255748"
+
+methods@^1.0.1:
+  version "1.1.2"
+  resolved "https://registry.yarnpkg.com/methods/-/methods-1.1.2.tgz#5529a4d67654134edcc5266656835b0f851afcee"
+
+mime-db@~1.27.0:
+  version "1.27.0"
+  resolved "https://registry.yarnpkg.com/mime-db/-/mime-db-1.27.0.tgz#820f572296bbd20ec25ed55e5b5de869e5436eb1"
+
+mime-types@^2.0.7, mime-types@~2.1.11, mime-types@~2.1.15:
+  version "2.1.15"
+  resolved "https://registry.yarnpkg.com/mime-types/-/mime-types-2.1.15.tgz#a4ebf5064094569237b8cf70046776d09fc92aed"
+  dependencies:
+    mime-db "~1.27.0"
+
+ms@2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/ms/-/ms-2.0.0.tgz#5608aeadfc00be6c2901df5f9861788de0d597c8"
+
+mz@^2.3.1:
+  version "2.6.0"
+  resolved "https://registry.yarnpkg.com/mz/-/mz-2.6.0.tgz#c8b8521d958df0a4f2768025db69c719ee4ef1ce"
+  dependencies:
+    any-promise "^1.0.0"
+    object-assign "^4.0.1"
+    thenify-all "^1.0.0"
+
+negotiator@0.6.1:
+  version "0.6.1"
+  resolved "https://registry.yarnpkg.com/negotiator/-/negotiator-0.6.1.tgz#2b327184e8992101177b28563fb5e7102acd0ca9"
+
+object-assign@^4.0.1:
+  version "4.1.1"
+  resolved "https://registry.yarnpkg.com/object-assign/-/object-assign-4.1.1.tgz#2109adc7965887cfc05cbbd442cac8bfbb360863"
+
+on-finished@^2.1.0:
+  version "2.3.0"
+  resolved "https://registry.yarnpkg.com/on-finished/-/on-finished-2.3.0.tgz#20f1336481b083cd75337992a16971aa2d906947"
+  dependencies:
+    ee-first "1.1.1"
+
+only@0.0.2:
+  version "0.0.2"
+  resolved "https://registry.yarnpkg.com/only/-/only-0.0.2.tgz#2afde84d03e50b9a8edc444e30610a70295edfb4"
+
+parseurl@^1.3.0:
+  version "1.3.1"
+  resolved "https://registry.yarnpkg.com/parseurl/-/parseurl-1.3.1.tgz#c8ab8c9223ba34888aa64a297b28853bec18da56"
+
+path-is-absolute@1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/path-is-absolute/-/path-is-absolute-1.0.1.tgz#174b9268735534ffbc7ace6bf53a5a9e1b5c5f5f"
+
+path-to-regexp@^1.1.1:
+  version "1.7.0"
+  resolved "https://registry.yarnpkg.com/path-to-regexp/-/path-to-regexp-1.7.0.tgz#59fde0f435badacba103a84e9d3bc64e96b9937d"
+  dependencies:
+    isarray "0.0.1"
+
+qs@^6.4.0:
+  version "6.4.0"
+  resolved "https://registry.yarnpkg.com/qs/-/qs-6.4.0.tgz#13e26d28ad6b0ffaa91312cd3bf708ed351e7233"
+
+random-bytes@~1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/random-bytes/-/random-bytes-1.0.0.tgz#4f68a1dc0ae58bd3fb95848c30324db75d64360b"
+
+raw-body@^2.2.0:
+  version "2.2.0"
+  resolved "https://registry.yarnpkg.com/raw-body/-/raw-body-2.2.0.tgz#994976cf6a5096a41162840492f0bdc5d6e7fb96"
+  dependencies:
+    bytes "2.4.0"
+    iconv-lite "0.4.15"
+    unpipe "1.0.0"
+
+resolve-path@^1.3.1:
+  version "1.3.3"
+  resolved "https://registry.yarnpkg.com/resolve-path/-/resolve-path-1.3.3.tgz#4d83aba6468c2b8e632a575e3f52b0fa0dbe1a5c"
+  dependencies:
+    http-errors "~1.5.0"
+    path-is-absolute "1.0.1"
+
+setprototypeof@1.0.2:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/setprototypeof/-/setprototypeof-1.0.2.tgz#81a552141ec104b88e89ce383103ad5c66564d08"
+
+setprototypeof@1.0.3:
+  version "1.0.3"
+  resolved "https://registry.yarnpkg.com/setprototypeof/-/setprototypeof-1.0.3.tgz#66567e37043eeb4f04d91bd658c0cbefb55b8e04"
+
+"statuses@>= 1.3.1 < 2", statuses@^1.2.0:
+  version "1.3.1"
+  resolved "https://registry.yarnpkg.com/statuses/-/statuses-1.3.1.tgz#faf51b9eb74aaef3b3acf4ad5f61abf24cb7b93e"
+
+thenify-all@^1.0.0:
+  version "1.6.0"
+  resolved "https://registry.yarnpkg.com/thenify-all/-/thenify-all-1.6.0.tgz#1a1918d402d8fc3f98fbf234db0bcc8cc10e9726"
+  dependencies:
+    thenify ">= 3.1.0 < 4"
+
+"thenify@>= 3.1.0 < 4":
+  version "3.3.0"
+  resolved "https://registry.yarnpkg.com/thenify/-/thenify-3.3.0.tgz#e69e38a1babe969b0108207978b9f62b88604839"
+  dependencies:
+    any-promise "^1.0.0"
+
+type-is@^1.5.5, type-is@^1.6.14:
+  version "1.6.15"
+  resolved "https://registry.yarnpkg.com/type-is/-/type-is-1.6.15.tgz#cab10fb4909e441c82842eafe1ad646c81804410"
+  dependencies:
+    media-typer "0.3.0"
+    mime-types "~2.1.15"
+
+uid-safe@^2.1.3:
+  version "2.1.4"
+  resolved "https://registry.yarnpkg.com/uid-safe/-/uid-safe-2.1.4.tgz#3ad6f38368c6d4c8c75ec17623fb79aa1d071d81"
+  dependencies:
+    random-bytes "~1.0.0"
+
+unpipe@1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/unpipe/-/unpipe-1.0.0.tgz#b2bf4ee8514aae6165b4817829d21b2ef49904ec"
+
+vary@^1.0.0:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/vary/-/vary-1.1.1.tgz#67535ebb694c1d52257457984665323f587e8d37"