Install base64 software:
opkg update opkg install coreutils-base64
Download test image:
cd /mnt/sda1/ wget -O uno.jpg http://www.adafruit.com/images/970x728/50-01.jpg
nano /mnt/sda1/upload.sh
#!/bin/ash
strbase64=$(/usr/bin/base64 --wrap=0 /mnt/sda1/uno.jpg)
echo "{\"image\":\""+$strbase64+"\"}" > /mnt/sda1/test.base64
curl -k -X PATCH -d @/mnt/sda1/test.base64 'https://shms.firebaseio.com/images/image.json'
chmod 755 /mnt/sda1/upload.sh
/mnt/sda1/upload.sh
Hide standard and error outputs:
curl -k -X PATCH -d @/mnt/sda1/test.base64 'https://shms.firebaseio.com/images/image.json' > /dev/null 2>&1
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