Raspberry Pi - RS232 COM & Serial console & BlueTooth  console Board

1. provide DB9 male COM port

2. provide i2c DS1307 RTC with CR1220 bauk-up battery

3. provide RFID socket ( SPI signal) / NRF24L01 socket (SPI signal)

    you can choose use RFID or NRF24L01  ( both use SPI signal)

4. Provide 2 extra i2c device input port, one for 3.3V, one for 5V (with Logic Level converter)

5. provide 3.3V power Regulator for 3.3V device ( RFID/ NRF24L01) i2c device

6. provide 3.5mm serial console cable socket,

7. provide jumper setting can change 3.5mm output TX, RX position.

8 HC-05 Bluetooth module   Datasheet

 1. Pi Setting for standard RS232 COM port function

    setting  

 2. Pi Setting serial console port for bluetooth 

Step 1. Modify the inittab File:
At a terminal command prompt issue this command:

sudo nano /etc/inittab

Look near the end of the file and find the lines that look like this:

 #Spawn a getty on Raspberry Pi serial line
T0:23:respawn:/sbin/getty -L ttyAMA0 115200 vt100

change to

#Spawn a getty on Raspberry Pi serial line
T0:23:respawn:/sbin/getty -L ttyAMA0 9600 vt100

Step 2.

sudo nano /boot/cmdline.txt

The entire contents of the file look like this:

dwc_otg.lpm_enable=0 console=ttyAMA0,115200 kgdboc=ttyAMA0,115200 console=tty1 root=/dev/mmcblk0p2 rootfstype=ext4 elevator=deadline rootwait

change to

dwc_otg.lpm_enable=0 console=ttyAMA0,9600 kgdboc=ttyAMA0,9600 console=tty1 root=/dev/mmcblk0p2 rootfstype=ext4 elevator=deadline rootwait

Step 3  .Bluetooth setting for console port

use Android Tablet  BlueTerm+ or BlueTerm 

find  "HC-05"  bluetooth device

input pin "1234" for pair   

you will see raspberry pi boot from Android Tablet screen

B2 LED flashing, B1 always On

3.5mm serial console cable setting

for serial console function you can setting 9600 or default 115200

RS232 console setting  

3.5mm serial console cable

RFID reader demo

the RFID socket we use CE0 for signal

 1)Command "RFID"+"INIT"+"0" 

  will initial SPI signal to active RFID Reader

 2) you will see "LastRFID" & "RFID" in Sensors

NRF24L01 demo

NRF24L01  WiFi Scanner demo