www.joy-it.net
Pascalstr. 8 47506 Neukirchen-Vluyn
EXPLORER 700
Expansion board
1. GENERAL INFORMATION
Dear customer,
Thank you for purchasing our product. In the following, we will show you
which things should be noted during the use.
Should you encounter any unexpected problems, do not hesitate to contact
us.
www.joy-it.net
Pascalstr. 8 47506 Neukirchen-Vluyn
2. CONNECTIONS
0,9" OLED:
SSD1306 driver,
resolution 128 x 64
Buzzer
CP2102 :
USB to UART converter
USB to UART: controlling the Pi
via serial interface
AD / DA IO-interface:
screw terminal
sensor interface:
connecting various sensors
Raspberry Pi GPIO interface:
to connect something with Raspberry Pi
BMP280: pressure sensor,
I2C interface
PCF8591: 8bit AD/DA
converter, I2C interface
PCF8574: I/O expension chip,
I2C interface
DS3231: real time clock
chip, I2C interface
Power indicator
user LED
joystick
LFN0038K IR
receiver
1-WIRE
interface: to
connect
1-WIRE
devices like
DS18B20
www.joy-it.net
Pascalstr. 8 47506 Neukirchen-Vluyn
3. CONNECTING THE EXPANSIONBOARD
The Explorer 700 expansion board supports the Raspberry Pi A+, B+, 2, 3
Model B and 4. Before you can perform the code examples, you should en-
sure that the Explorer 700 is connected to your Raspberry Pi and it is provided by power.
4. EXAMPLE - CHANGING THE LED STATUS
The explorer board has a LED which can be controlled by our code examples.
For that open the Linux console and enter the following commands:
cd ~/Desktop/RB-Explorer700/LED/python
sudo python led.py
Because of the code example, LED1 is now blinking.
Press the keys STRG + C to exit this program.
You can change the LED furthermore with the second code example.
sudo python pwm.py
This program allows the LED to pulsate. It happens trough the change of
brightness step by step.
Press the keys STRG + C to exit happens.
www.joy-it.net
Pascalstr. 8 47506 Neukirchen-Vluyn
6. EXAMPLE I/O - PCF8574
The GPIO expansion PCF8574 controlls the LED2 and the Joystick. These can
be used as well as the other functions of the expansionboard.
Open the console and enter the following commands:
cd ~/Desktop/RB-Explorer700/PCF8574/python
sudo python led.py
With this program, LED2 is blinking.
Press the keys STRG + C to exit the program.
sudo python pcf8574.py
This program unites dierent functions of the Explorerboard because if the
joystick is moved into one direction, the buzzer will chime, LED2 will light up
and the console will show the direction.
PCF8574 Test Program!
up
left
down
right
Press the keys STRG + C to exit the program.
7. EXAMPLE BAROMETER - BMP280
These code examples obtain the usage of dierent functions of the
barometer. In two dierent code examples the temperature, air pressure
and the relative height will queried and issued. Therefore, it is to note that
the room temperature can be influenced by the warmth of the Raspberry Pi.
Open for that the console and enter the following commands:
cd ~/Desktop/RB-Explorer700/BMP280/python
sudo python temperature-and-pressure.py
5. EXAMPLE - PRESS FUNCTION OF THE JOYSTICK
The joystick owns next to the pres function the common dircetions of
movement. Our code example shows, when the press function is used.
Open the Linux console and enter the following commands:
cd ~/Desktop/RB-Explorer700/KEY/python
sudo python key.py
By Pressing the Joystick, the console will show the following:
Key Test Program!!!!
KEY PRESS
KEY PRESS
KEY PRESS
www.joy-it.net
Pascalstr. 8 47506 Neukirchen-Vluyn
8. REAL TIME CLOCK EXAMPLE - DS3231
On the Explorerboard is a real time clock which can be used for displays like
in this example. For that you have to open your console and enter the
following commands:
cd ~/Desktop/RB-Explorer700/DS3231/python
sudo python ds3231.py
The console will show the date and the current time as well as the day of the
week.
2018/08/12 18:00:00 Wed
2018/08/12 18:00:00 Wed
2018/08/12 18:00:00 Wed
Press the keys STRG + C to exit the program.
Temperature-and-pressure.py - Display the temperature and pressure.
Press Ctrl+C to exit!
Temperature = 36.25 *C & Pressure = 998.20 mbar
Temperature = 36.25 *C & Pressure = 998.20 mbar
Temperature = 36.26 *C & Pressure = 998.20 mbar
Press the keys STRG + C to exit the program.
sudo python relative-altitude.py
This code example will issue the relative height in your console. This height depends
on the current position of the Raspberry Pi and this will be set within 100 seconds.
During this time you are not allowed to move the Pi.
Relative-altitude - Calculates relative altitude from pressure.
Press Ctrl+C to exit!
Collecting baseline values for 100 seconds. Do not move the sensor!
Relative altitude: 00.00 metres
Relative altitude: 00.05 metres
Press the keys STRG + C to exit the program.
This program will issue the temperature as well as the air pressure:
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