Compile lcdproc hd44780 driver on Raspberry Pi running Debian Stretch

In order to get my 20×4 LCD display with cheap IIC/I2C/TWI/SPI Serial Interface Board running on Raspberry Pi I had to use patched hd44780.so file downloaded from NeighborGeek. You can check it out here

This worked fine on my RPi3 running Debian Jessie, but recently I have upgraded to Stretch and found out that his driver now is having issues. After running for longer period of time the screen would be full of garbage characters.

I thought I could repeat the steps, download source, patch the source, compile and use again hd44780.so file instead of the one provided by distribution.

First thing I did was to download latest source from GitHub:

wget https://github.com/lcdproc/lcdproc/archive/master.zip
unzip master.zip
cd lcdproc-master

Now I tried to apply the hd44780-i2c.c patch but it failed. Then I checked the hd44780-i2c.c file in the source I found out that patch is no longer needed just proper configuration in LCDd.conf.

In order to compile the latest driver from GitHub following steps are needed:

./autogen.sh
./configure --disable-libusb --disable-libusb-1-0 --enable-drivers=hd44780 --disable-libftdi
make

After you have compiled the driver, go to directory:

 cd /usr/lib/arm-linux-gnueabihf/lcdproc/

and backup existing file just in case something goes wrong:

cp hd44780.so hd44780.so.orig

Then copy the newly compiled driver in proper place:

cp /usr/local/src/lcdproc-master/server/drivers/hd44780.so .

Edit LCDd.conf and add the following after hd44780 part:

i2c_line_RS=0x01
i2c_line_RW=0x02
i2c_line_EN=0x04
i2c_line_BL=0x80
i2c_line_D4=0x10
i2c_line_D5=0x20
i2c_line_D6=0x40
i2c_line_D7=0x80
Backlight=yes
BacklightInvert=yes

You can download my newly compiled driver and LCDd.conf from this link  hd44780_debian_stretch.

I hope this has saved you some time and got your 20×4 LCD working with Debian Stretch.

Install PHP 7.1 on Debian Jessie ARM 64bit architecture

I wanted to test PHP7 on my Debian Jessie install, but latest offered package in the repositories was 5.6.30+dfsg-0+deb8u1.

In order to install PHP 7.1 which was the latest at the time of this article, you need to add following repository by running following commands:

apt-get install apt-transport-https lsb-release ca-certificates
wget -O /etc/apt/trusted.gpg.d/php.gpg https://packages.sury.org/php/apt.gpg
echo "deb https://packages.sury.org/php/ $(lsb_release -sc) main" > /etc/apt/sources.list.d/php.list
apt-get update

Continue reading “Install PHP 7.1 on Debian Jessie ARM 64bit architecture”

Server side solution to stop redirect from http to https in Chrome

If you have configured your main web site domain to use SSL for example https://your.domain and https://www.your.domain and you have other sub-domains that you access without SSL you could face an issue where Chrome browser insists to use HTTPS on your sub-domains as well. This can cause problems accessing your sub-domain if it is not using SSL.

Even if you manually type http://subdomain.your.domain it will automatically redirect you to https://subdomain.your.domain Continue reading “Server side solution to stop redirect from http to https in Chrome”

How to fix corrupt packet error for with rsync for large files

In order to have local copies of my web pages hosted on VPS I have configured rsync cronjob to sync everything during the night to my local box.

Sometimes with larger files you can encounter errors like these:

Received disconnect from [YOUR_IP]: 2: Packet corrupt
rsync: [sender] write error: Broken pipe (32)
rsync error: unexplained error (code 255) at io.c(820) [sender=3.1.1]

Continue reading “How to fix corrupt packet error for with rsync for large files”