Change dir of openwrt and refactor sh script

openwrt/files/usbserial-dw.config

@@ -0,0 +1,7 @@
+config capture
+	option port /dev/ttyUSB0
+	option speed 115200
+	option directory /tmp
+	option file camera.jpg
+	option url https://meranie.bh.ttx.sk/upload/image
+	option time 300

openwrt/files/usbserial-dw.sh

@@ -0,0 +1,29 @@
+#!/bin/sh /etc/rc.common
+# Copyright (C) 2018 wongsyrone
+
+. /lib/functions.sh
+
+PROG=/usr/bin/usbserial-dw
+CURL=/usr/bin/curl
+
+parse_capture() {
+    local section="$1"
+    local _port
+    local _speed
+    local _dir
+    local _file
+
+    config_get _port "$section" "port"
+    config_get _speed "$section" "speed"
+    config_get _dir "$section" "dir"
+    config_get _file "$section" "file"
+    config_get _url "$section" "url"
+
+    $PROG --port $_port --speed $_speed --dir $_dir --file $_file
+    cd $_dir
+    $CURL -v -X POST -F "submit=OK" -F "file=@camera.jpg" $_url
+    rm $_file
+}
+
+config_load usbserial
+config_foreach parse_capture capture