WEATHER-BOARD with shifter shield on ODROID-XU4
The WEATHER-BOARD can use one of three I2C buses on the SHIFTER-SHIELD.
Directly connecting WEATHER-BOARD to ODROID-XU4
H/W I2C(I2C-A) on CON10
| Kernel 3.10.y (node name) | Kernel 4.14.y (node name) | Net Name | Export Number | Description |
|---|---|---|---|---|
| /dev/i2c-4 | /dev/i2c-1 | GPB3[2](I2C_1.SDA) | 209 | SDA |
| GPB3[3](I2C_1.SCL) | 210 | SCL |
H/W I2C(I2C-B : HS-I2C) on CON11
| Kernel 3.10.y (node name) | Kernel 4.14.y (node name) | Net Name | Export Number | Description |
|---|---|---|---|---|
| /dev/i2c-1 | /dev/i2c-5 | GPA2[2](I2C_5.SDA) | 187 | SDA |
| GPA2[3](I2C_5.SCL) | 188 | SCL |
How to check WEATHER-BOARD with i2c-tools.
This instruction was tested on Ubuntu 18.04 Install package
sudo apt install i2c-tools
Find your device's address with “i2cdetect”.
sudo i2cdetect -y -r [1 or 5]
If you wired your device to pin #14 and #16 on CON10, then you can find the device's address with the following command.
odroid@odroid:~$ sudo i2cdetect -y -r 1
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: 60 -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- 76 --
odroid@odroid:~$
Otherwise, if you connect to pin #4 and #6 on CON11, you can find the address with this command.
Note that this I2C channel-B is a SMBUS type and you have to add '-r' option mandatory.
odroid@odroid:~$ sudo i2cdetect -y -r 5
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: 60 -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- 76 --
odroid@odroid:~$
Weather board rev 0.1 output
odroid@odroid:~$ sudo i2cdetect -y -r 1
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: 40 -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: 60 -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- 77
Pure C code
This guide is tested on Ubuntu 16.04(kernel XU4-4.9.27).
Install git package
- target
$ sudo apt-get install git
Get the WEATHER-BOARD source code.
- target
$ mkdir work $ cd work $ git clone https://github.com/hardkernel/WEATHER-BOARD.git $ cd WEATHER-BOARD/c_weather $ make
Check your I2C node first and run the program.
- target
$ sudo ./weather_board [i2c node name(default /dev/i2c-1)]
If weather board is connected to I2C Channel-A (Kernel 4.9.y)
- target
$ sudo ./weather_board /dev/i2c-1
WiringPi
If you want to get the WEATHER-BOARD source code using wiringPi library.
- target
$ git clone https://github.com/hardkernel/wiringPi $ cd wiringPi $ ./build $ git clone https://github.com/hardkernel/WEATHER-BOARD.git $ cd WEATHER-BOARD/c_weather/wiringPi $ make $ sudo ./weather_board [/dev/i2c-number]
Python
- target
$ sudo apt install python-smbus $ git clone https://github.com/hardkernel/WEATHER-BOARD.git $ cd WEATHER-BOARD/python_weather $ python weather_board.py [/dev/i2c-number]
for Android
Change the permissions for /dev/i2c-1 node.
- target
shell@odroidxu3:/ $ su root@odroidxu3:/ # mount -o rw,remount / [ 2147.583574] [c6] EXT4-fs (mmcblk0p2): re-mounted. Opts: (null) root@odroidxu3:/ # vi /uevent.odroidxu3.rc
Add behind line to /uevent.odroidxu3.rc and you have to reboot the ODROID-XU4.
/dev/i2c-1 0666 system system
Please download the project by behind's commands. And then build and test the project.
We recommend to use Android Studio.
- host
$ git clone https://github.com/codewalkerster/weatherboard
If you success running the project, you can see the screen like the screenshot.
odroid