Raspberry Pi وMySQL الخارجي

Question

لقد اتبعت هذه التعليمات: التحكم في الويب لـ Raspberry Pi GPIO.

يوضح كيفية تشغيل أو إيقاف تشغيل دبابيس GPIO من خلال واجهة ويب بسيطة.في الأساس، يقوم ملف PHP بتحديث قاعدة بيانات MySQL محلية بمعلومات حول المسامير (تشغيل أو إيقاف تشغيلها) ويقوم ملف .sh بقراءة قاعدة البيانات باستمرار لمعرفة ما إذا كان يجب تشغيل الدبوس أو إيقاف تشغيله.هنا ملف .sh:

# Script created by Daniel Curzon (http://www.instructables.com/member/drcurzon)
# Initial version created 10th June 2012
# Version: 1.0

###################################
#####  EDIT THESE BEFORE USE  #####
###################################
mysqlusername="USERNAME"
mysqlpassword="PASSWORD"

#############################################################################################################################
################################################### DO NOT EDIT BELOW THIS LINE ##############################################
##############################################################################################################################

#Set  Refresh
echo "How long do you want the wait time to be?          "
read waitTime

#Invoke GPIO
echo "4" > /sys/class/gpio/export
echo "17" > /sys/class/gpio/export
echo "18" > /sys/class/gpio/export
echo "21" > /sys/class/gpio/export
echo "22" > /sys/class/gpio/export
echo "23" > /sys/class/gpio/export
echo "24" > /sys/class/gpio/export
echo "25" > /sys/class/gpio/export

#Start Loop
while :
do
#Read MySQL Data
#Direction
direction4=$(mysql -B --disable-column-names --user=$mysqlusername --password=$mysqlpassword gpio -e "SELECT pinDirection FROM pinDirection WHERE pinNumber='4'";)
direction17=$(mysql -B --disable-column-names --user=$mysqlusername --password=$mysqlpassword gpio -e "SELECT pinDirection FROM pinDirection WHERE pinNumber='17'";)
direction18=$(mysql -B --disable-column-names --user=$mysqlusername --password=$mysqlpassword gpio -e "SELECT pinDirection FROM pinDirection WHERE pinNumber='18'";)
direction21=$(mysql -B --disable-column-names --user=$mysqlusername --password=$mysqlpassword gpio -e "SELECT pinDirection FROM pinDirection WHERE pinNumber='21'";)
direction22=$(mysql -B --disable-column-names --user=$mysqlusername --password=$mysqlpassword gpio -e "SELECT pinDirection FROM pinDirection WHERE pinNumber='22'";)
direction23=$(mysql -B --disable-column-names --user=$mysqlusername --password=$mysqlpassword gpio -e "SELECT pinDirection FROM pinDirection WHERE pinNumber='23'";)
direction24=$(mysql -B --disable-column-names --user=$mysqlusername --password=$mysqlpassword gpio -e "SELECT pinDirection FROM pinDirection WHERE pinNumber='24'";)
direction25=$(mysql -B --disable-column-names --user=$mysqlusername --password=$mysqlpassword gpio -e "SELECT pinDirection FROM pinDirection WHERE pinNumber='25'";)
#Status
status4=$(mysql -B --disable-column-names --user=$mysqlusername --password=$mysqlpassword gpio -e "SELECT pinStatus FROM pinStatus WHERE pinNumber='4'";)
status17=$(mysql -B --disable-column-names --user=$mysqlusername --password=$mysqlpassword gpio -e "SELECT pinStatus FROM pinStatus WHERE pinNumber='17'";)
status18=$(mysql -B --disable-column-names --user=$mysqlusername --password=$mysqlpassword gpio -e "SELECT pinStatus FROM pinStatus WHERE pinNumber='18'";)
status21=$(mysql -B --disable-column-names --user=$mysqlusername --password=$mysqlpassword gpio -e "SELECT pinStatus FROM pinStatus WHERE pinNumber='21'";)
status22=$(mysql -B --disable-column-names --user=$mysqlusername --password=$mysqlpassword gpio -e "SELECT pinStatus FROM pinStatus WHERE pinNumber='22'";)
status23=$(mysql -B --disable-column-names --user=$mysqlusername --password=$mysqlpassword gpio -e "SELECT pinStatus FROM pinStatus WHERE pinNumber='23'";)
status24=$(mysql -B --disable-column-names --user=$mysqlusername --password=$mysqlpassword gpio -e "SELECT pinStatus FROM pinStatus WHERE pinNumber='24'";)
status25=$(mysql -B --disable-column-names --user=$mysqlusername --password=$mysqlpassword gpio -e "SELECT pinStatus FROM pinStatus WHERE pinNumber='25'";)

#Run Commands
if [ "$direction4" == "out" ]; then
    echo "out" > /sys/class/gpio/gpio4/direction
    if [ "$status4" == "1" ]; then
        echo "1" > /sys/class/gpio/gpio4/value
        echo "GPIO 4 Turned On"
    else
        echo "0" > /sys/class/gpio/gpio4/value
        echo "GPIO 4 Turned Off"
    fi
else
    echo "in" > /sys/class/gpio/gpio4/direction
fi
if [ "$direction17" == "out" ]; then
        echo "out" > /sys/class/gpio/gpio17/direction
    if [ "$status17" == "1" ]; then
                echo "1" > /sys/class/gpio/gpio17/value
                echo "GPIO 17 Turned On"
        else
                echo "0" > /sys/class/gpio/gpio17/value
                echo "GPIO 17 Turned Off"
        fi
else
        echo "in" > /sys/class/gpio/gpio17/direction
fi
if [ "$direction18" == "out" ]; then
        echo "out" > /sys/class/gpio/gpio18/direction
    if [ "$status18" == "1" ]; then
                echo "1" > /sys/class/gpio/gpio18/value
                echo "GPIO 18 Turned On"
        else
                echo "0" > /sys/class/gpio/gpio18/value
                echo "GPIO 18 Turned Off"
        fi
else
        echo "in" > /sys/class/gpio/gpio18/direction
fi
if [ "$direction21" == "out" ]; then
        echo "out" > /sys/class/gpio/gpio21/direction
    if [ "$status21" == "1" ]; then
                echo "1" > /sys/class/gpio/gpio21/value
                echo "GPIO 21 Turned On"
        else
                echo "0" > /sys/class/gpio/gpio21/value
                echo "GPIO 21 Turned Off"
        fi
else
        echo "in" > /sys/class/gpio/gpio21/direction
fi
if [ "$direction22" == "out" ]; then
        echo "out" > /sys/class/gpio/gpio22/direction
    if [ "$status22" == "1" ]; then
                echo "1" > /sys/class/gpio/gpio22/value
                echo "GPIO 22 Turned On"
        else
                echo "0" > /sys/class/gpio/gpio22/value
                echo "GPIO 22 Turned Off"
        fi
else
        echo "in" > /sys/class/gpio/gpio22/direction
fi
if [ "$direction23" == "out" ]; then
        echo "out" > /sys/class/gpio/gpio23/direction
    if [ "$status23" == "1" ]; then
                echo "1" > /sys/class/gpio/gpio23/value
                echo "GPIO 23 Turned On"
        else
                echo "0" > /sys/class/gpio/gpio23/value
                echo "GPIO 23 Turned Off"
        fi
else
        echo "in" > /sys/class/gpio/gpio23/direction
fi
if [ "$direction24" == "out" ]; then
        echo "out" > /sys/class/gpio/gpio24/direction
    if [ "$status24" == "1" ]; then
                echo "1" > /sys/class/gpio/gpio24/value
                echo "GPIO 24 Turned On"
        else
                echo "0" > /sys/class/gpio/gpio24/value
                echo "GPIO 24 Turned Off"
        fi
else
        echo "in" > /sys/class/gpio/gpio24/direction
fi
if [ "$direction25" == "out" ]; then
        echo "out" > /sys/class/gpio/gpio25/direction
    if [ "$status25" == "1" ]; then
                echo "1" > /sys/class/gpio/gpio25/value
                echo "GPIO 25 Turned On"
        else
                echo "0" > /sys/class/gpio/gpio25/value
                echo "GPIO 25 Turned Off"
        fi
else
        echo "in" > /sys/class/gpio/gpio25/direction
fi
#Complete Loop
sleep $waitTime
done

أريد التحكم في GPIO خارج شبكتي، لذلك أردت تحميل قاعدة البيانات إلى خادم وإنشاء موقع ويب لتحديثها.ومع ذلك، ليس لدي أي فكرة عن كيفية الوصول إلى خارجي قاعدة بيانات MySQL في ملف .sh!كيف يمكنني فعل ذلك؟

Answer 1

يمكنك إخبار MySQL بالمضيف الذي تريد الاتصال به باستخدام ملف --host=<hostname> خيار.قد تحتاج إلى السماح بالاتصالات الخارجية على الخادم بالرغم من ذلك.

ينظر الى http://linux.die.net/man/1/mysql لمزيد من التفاصيل.قم بالتمرير لأسفل إلى "--المضيف".