raspberry-pi

问题 I have a serial Python program, Linux environment (Raspbian / Raspberry Pi), that uses a serial port via USB & serial adapter. I need to handle a situation when the user unplug the USB adapter and then re-insert it. The problem is that, on reconnect, the ttyUSB0 becomes ttyUSB1 and so the port is no longer found. However, if I stop the Python program (keyboard interrupt) and again unplug and re-insert the USB adapter, then the port goes back to ttyUSB0 (and so I can start over again). This

问题 I have a serial Python program, Linux environment (Raspbian / Raspberry Pi), that uses a serial port via USB & serial adapter. I need to handle a situation when the user unplug the USB adapter and then re-insert it. The problem is that, on reconnect, the ttyUSB0 becomes ttyUSB1 and so the port is no longer found. However, if I stop the Python program (keyboard interrupt) and again unplug and re-insert the USB adapter, then the port goes back to ttyUSB0 (and so I can start over again). This

问题 A user in this SOF post suggests building OpenCV with a WITH_OPENMP flag to enable (some) multi-core support. I have tried building OpenCV-2.4.10 with OpenMP but I am unable to then import cv2 in Python. Note: I am able to build and use OpenCV-2.4.10 in Python. The problem is building with the WITH_OPENMP flag. I am replacing lines 49-58 in opencv-2.4.10/cmake/OpenCVFindLibsPerf.cmake , as suggested in this blog post, with the following: # --- OpenMP --- if(NOT HAVE_TBB AND NOT HAVE_CSTRIPES)

问题 A user in this SOF post suggests building OpenCV with a WITH_OPENMP flag to enable (some) multi-core support. I have tried building OpenCV-2.4.10 with OpenMP but I am unable to then import cv2 in Python. Note: I am able to build and use OpenCV-2.4.10 in Python. The problem is building with the WITH_OPENMP flag. I am replacing lines 49-58 in opencv-2.4.10/cmake/OpenCVFindLibsPerf.cmake , as suggested in this blog post, with the following: # --- OpenMP --- if(NOT HAVE_TBB AND NOT HAVE_CSTRIPES)

问题 I am trying to detect if my iPhone is in the same network as my Raspberry Pi. I would like to execute a script when I am at home and my iPhone's presence is registered in my LAN. It seems that when the phone is in standby not even the iphone-sync port (6207/tcp) is found. "/usr/bin/nmap -n -sT -p62078 [my phone's local IP]" shows no host. I wonder what else I could scan for. Obviously the phone is online and ready to accept facetime calls (data via 3G is deactivated). Could I accomplish

问题 I have read a lot of articles and forum posts about this topic, but almost everything is quite complicated and all from over 2+ years ago. So I was wondering, What is the best way tot get the CPU temperature of the Raspberry Pi in C# ? I have the newest version of Windows 10 IoT Core. Update I dont want to reduce the CPU temperature. I am using the Sense HAT. The temperature sensor of that thing is located near the CPU so the reading is inaccurate. I have found a python script what makes the

问题 I have read a lot of articles and forum posts about this topic, but almost everything is quite complicated and all from over 2+ years ago. So I was wondering, What is the best way tot get the CPU temperature of the Raspberry Pi in C# ? I have the newest version of Windows 10 IoT Core. Update I dont want to reduce the CPU temperature. I am using the Sense HAT. The temperature sensor of that thing is located near the CPU so the reading is inaccurate. I have found a python script what makes the

问题 I have read a lot of articles and forum posts about this topic, but almost everything is quite complicated and all from over 2+ years ago. So I was wondering, What is the best way tot get the CPU temperature of the Raspberry Pi in C# ? I have the newest version of Windows 10 IoT Core. Update I dont want to reduce the CPU temperature. I am using the Sense HAT. The temperature sensor of that thing is located near the CPU so the reading is inaccurate. I have found a python script what makes the

问题 I have read a lot of articles and forum posts about this topic, but almost everything is quite complicated and all from over 2+ years ago. So I was wondering, What is the best way tot get the CPU temperature of the Raspberry Pi in C# ? I have the newest version of Windows 10 IoT Core. Update I dont want to reduce the CPU temperature. I am using the Sense HAT. The temperature sensor of that thing is located near the CPU so the reading is inaccurate. I have found a python script what makes the

问题 I am trying to detect if my iPhone is in the same network as my Raspberry Pi. I would like to execute a script when I am at home and my iPhone's presence is registered in my LAN. It seems that when the phone is in standby not even the iphone-sync port (6207/tcp) is found. "/usr/bin/nmap -n -sT -p62078 [my phone's local IP]" shows no host. I wonder what else I could scan for. Obviously the phone is online and ready to accept facetime calls (data via 3G is deactivated). Could I accomplish