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SainSmart RS232 / GPIO Shield for Raspberry Pi

SainSmart RS232 / GPIO Shield for Raspberry Pi

Kratki Opis :

This is a shield to add a RS232 level shift to the UART of Raspberry Pi. Moreover, it also breakout the rest headers for easy access.

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15,00 €

AB-20-111-907

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Description:

This is a shield to add a RS232 level shift to the UART of Raspberry Pi. Moreover, it also breakout the rest headers for easy access.

Instrukcije :

UART na Raspberry Pi je na P1 te prikazan na slici dolje:
 


 
The UART is /dev/ttyAMAO,  it defaults to output system log.  But if user wants to use this UART to connect to other modules through UART, for example, GPS module, we need to change the configuration.

Detaljni koraci su:

We need to modify two files:  /boot/cmdline.txt and /etc/inittab.
Modify /boot/cmdline.txt:
Replace the original content: 
dwc_otg.lpm_enable=0 console=ttyAMA0,115200 kgdboc=ttyAMA0,115200 console=tty1 root=/dev/mmcblk0p2 rootfstype=ext4 elevator=deadline rootwait
With: dwc_otg.lpm_enable=0 console=tty1 root=/dev/mmcblk0p2 rootfstype=ext4 elevator=deadline rootwait
 
Modify /etc/inittab:
Comment out the last line of /etc/inittab. To comment out, it simply addess a '#'.
 
$ sudo vi /etc/inittab
#T0:23:respawn:/sbin/getty -L ttyAMA0 115200 vt100
Save the changes, and reboot. We will get an UART with baud rate of 115200.

Preuzimanje :

Put: > > > > SainSmart RS232 / GPIO Shield for Raspberry Pi

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