raspberry-pi

问题 I've written a Python3 script which runs on Raspberry Pi Zero W that collects data from an IMU sensor (MPU9250) and creates 3 different angle values; roll, pitch, yaw. Which looks like this: def main(): while True: dataAcc = mpu.readAccelerometerMaster() dataGyro = mpu.readGyroscopeMaster() dataMag = mpu.readMagnetometerMaster() [ax, ay, az] = [round(dataAcc[0], 5), round(dataAcc[1], 5), round(dataAcc[2], 5)] [gx, gy, gz] = [round(dataGyro[0], 5), round(dataGyro[1], 5), round(dataGyro[2], 5)]

问题 I want to scan the ble devices in the environment of my Raspberry, by using a python script called from a cron script. But when I do this in cron (I mean I added to sudo crontab -e), I allways end up with an empty list. when I am logged in as pi user - btmgmt works (only) fine with su permissions: pi@Pluto:~ $ btmgmt find Unable to start discovery. status 0x14 (Permission Denied) pi@Pluto:~ $ sudo btmgmt find Discovery started hci0 type 7 discovering on hci0 dev_found: 77:F8:D7:8A:1E:E5 type

问题 I am a complete beginner so apologies for any mistakes. This is my code in Python 3.5. It executes in Raspbian on a Raspberry Pi 3. import subprocess radio = subprocess.Popen(["mplayer", 'http://edge-bauerabsolute-02-gos1.sharp-stream.com/absolute90s.mp3?'], shell = False , stdout=subprocess.PIPE) print ("Other code - no waiting for the subprocess to finish") The radio plays for about 30 seconds and then stops. I want it to run in the background without the script waiting for the subprocess

问题 I like to remove some unused drivers for my RPI2 + custom board. For that I am creating an own configuration via: bitbake linux-raspberrypi -c menuconfig and save the new kernel preset to the file defconfig . After this I created an append file for the linux-raspberryp recipe. So I created the file linux-raspberrypi%.bbappend and filled it with: FILESEXTRAPATHS_prepend := "${THISDIR}/linux-raspberrypi:" SRC_URI += "file://defconfig" PACKAGE_ARCH = "raspberrypi2" I put the defconfig file to:

问题 I've got a Raspberry Pi. I've installed on it WiringPi for pilot GPIO on the board via command line. I've done a script called aggiornaora.sh gpio -g write 18 1 #it set the GPIO port to 1 #log with reverse append (echo 'accensione';date;echo ' ') | cat - logstufa.txt > temp && mv temp logstufa.txt This script work fine if I try to exec it directly via sh aggiornaora.sh . But when cron run the script, it do only the second action. All with root permission. I've checked this problem through

问题 To present my question I will simplify my example. I will connect a sprocket on a step motor and measure acceleration with an accelerometer. The data will be captured by using either an Arduino or Raspberry pi sensor setup. The measurements will then be stored in a cloud-based environment or somehow similar and be send to the CAD model (that's the idea). Basically what I would like to achieve is to: connect the movement of the step motor with the SW/CATIA/AutoCAD model (if the physical

问题 To present my question I will simplify my example. I will connect a sprocket on a step motor and measure acceleration with an accelerometer. The data will be captured by using either an Arduino or Raspberry pi sensor setup. The measurements will then be stored in a cloud-based environment or somehow similar and be send to the CAD model (that's the idea). Basically what I would like to achieve is to: connect the movement of the step motor with the SW/CATIA/AutoCAD model (if the physical

问题 To present my question I will simplify my example. I will connect a sprocket on a step motor and measure acceleration with an accelerometer. The data will be captured by using either an Arduino or Raspberry pi sensor setup. The measurements will then be stored in a cloud-based environment or somehow similar and be send to the CAD model (that's the idea). Basically what I would like to achieve is to: connect the movement of the step motor with the SW/CATIA/AutoCAD model (if the physical

问题 I have a self-written programm which I want to build also for Raspberry Pi from my x86 machine. I'm using eclipse generated makefiles and cannot change this thing. I've read this tutorial for CC for raspi : Hackaday-Link. Because raspi also have installed gcc version 4.9, I also try it with this version of the cross compiler. The problem also exisits with this hello world programm: #include <iostream> using namespace std; int main(int argc, char *argv[]) { cout << "hello world!" << endl; }

问题 I have a self-written programm which I want to build also for Raspberry Pi from my x86 machine. I'm using eclipse generated makefiles and cannot change this thing. I've read this tutorial for CC for raspi : Hackaday-Link. Because raspi also have installed gcc version 4.9, I also try it with this version of the cross compiler. The problem also exisits with this hello world programm: #include <iostream> using namespace std; int main(int argc, char *argv[]) { cout << "hello world!" << endl; }