louisopen / rpi-rf

Sending and receiving 433MHz signals with cheap GPIO RF modules on a Raspberry Pi

My application note

2020-2023

1. How to setting "don't entry screen saving mode" in Desktop ?

因為Raspbian開機內定義有螢幕休眠, 所以我們需要rpi-rf_receive應用上取消休眠

sudo nano /etc/lightdm/lightdm.conf

• [SeatDefaults]
• ...
• #xserver-command=X #Change to as below
• xserver-command=X -s 0 –dpms
• ...

2. How to auto create CMD line to run application rpi-rf_receive in the X-windows mode

視窗模式開機即開啟一個終端機模式, 並運行rpi-rf_receive (改用另一個)

sudo nano /etc/xdg/lxsession/LXDE-pi/autostart

• ...
• #Exec = lxterminal -e /home/pi/autorun.sh
• Exec = lxterminal -e "bash -c /home/pi/autorun.sh;bash"
• ...

3. Auto run application after log-in termainal in the X-Windows mode.

視窗模式下自動開啟一個終端機模式(用戶登入或自動登入), 並運行應用程序

sudo nano /home/pi/.config/autostart/autoboot.desktop

• ...

• [Desktop Entry]

• Type=Application

• Name=MyApplicationRun

• #Exec = lxterminal -e /home/pi/autorun.sh #運行掛機 applivcation close aftern run 5day

• Exec = lxterminal -e "bash -c /home/pi/autorun.sh;bash" #運行測試(Stay Bash)

• Icon=pictur.png

• ... or

• [Desktop Entry]

• Encoding=UTF-8

• Type=Application

• Name=myprogram

• Exec=lxterminal -e bash -c '/home/pi/autorun.sh;$SHELL' #bash run autorun.sh

• Terminal=true

• ...

#The $SHELL makes the terminal stay open after myprogram ends its execution.

4. autorun.sh

運行程序的內容

...

sudo python $jump_dir/status_spi.py & #IP status display

sudo python3 $jump_dir/rpi_rf/rpi-rf_receive #本程序main python

5. Change receive code of the display on terminal dispaly.

做了一些應用上的改變,改變接收代碼及顯示

433MHz rf發送端已經定義的應用有DS18B02(temperature),DHT22(Temperature/Humidity),Arduino ADC