sensors

问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 9 days ago . Improve this question We are using a DS18B20 temperature sensor (1 Wire Communication ) .The Sensor has 3 interfaces VCC,GND , and output in Digital formant How can we display the Output on the 7 segment Display . Should we use STD_LOGIC_VECTOR ?.Note : We will be using an FPGA not

问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 9 days ago . Improve this question We are using a DS18B20 temperature sensor (1 Wire Communication ) .The Sensor has 3 interfaces VCC,GND , and output in Digital formant How can we display the Output on the 7 segment Display . Should we use STD_LOGIC_VECTOR ?.Note : We will be using an FPGA not

问题 I'm working on sensor data acquisition in Android (Jelly Bean on Samsung Galaxy S3). I'm new to Android/Linux internals. I'm trying to read Android sources on how the sensor samples rise from the drivers to userspace. As a reference take a look here. I can go all the way from the SensorManager down to the SensorService. I can see the kernel module loading infrastructure, the registration of the event input device and the input_report_rel() function calls in the drivers (e.g. the open-sourced

问题 I'm working on sensor data acquisition in Android (Jelly Bean on Samsung Galaxy S3). I'm new to Android/Linux internals. I'm trying to read Android sources on how the sensor samples rise from the drivers to userspace. As a reference take a look here. I can go all the way from the SensorManager down to the SensorService. I can see the kernel module loading infrastructure, the registration of the event input device and the input_report_rel() function calls in the drivers (e.g. the open-sourced

问题 Dealing with a smart garden setup. I am doing threading with three different functions so that if triggered I can run the lamp/pump/fan for a predetermined time. While threading with lamp and pump there is no problem. But when attempting to thread with Dht22 the program will work for a while and then throw an error of "argument must be an int, or be format of file.no()" I think the problem is due to the array format, but I don't know how to read just the temperature from the dht22 or to make

问题 Dealing with a smart garden setup. I am doing threading with three different functions so that if triggered I can run the lamp/pump/fan for a predetermined time. While threading with lamp and pump there is no problem. But when attempting to thread with Dht22 the program will work for a while and then throw an error of "argument must be an int, or be format of file.no()" I think the problem is due to the array format, but I don't know how to read just the temperature from the dht22 or to make

问题 Dealing with a smart garden setup. I am doing threading with three different functions so that if triggered I can run the lamp/pump/fan for a predetermined time. While threading with lamp and pump there is no problem. But when attempting to thread with Dht22 the program will work for a while and then throw an error of "argument must be an int, or be format of file.no()" I think the problem is due to the array format, but I don't know how to read just the temperature from the dht22 or to make

问题 I want to get the app user's steps data, but I got the data wasn't current day's, how can I to get the only current day data? public StepCounterRecord(ReactApplicationContext reactContext) { mSensorManager = (SensorManager)reactContext.getSystemService(reactContext.SENSOR_SERVICE); mReactContext = reactContext; } public int start(int delay) { this.delay = delay; if ((mStepCounter = mSensorManager.getDefaultSensor(Sensor.TYPE_STEP_COUNTER)) != null) { mSensorManager.registerListener(this,

问题 Hy, I have a problem related to the proximity sensor. When I put the finger on it, I want to turn the screen off and when I take the finger, I want to turn the screen on. I successfully did the turning off part, but when I take the finger off the sensor, it does not seem to execute the onSensorChanged method. Here is the code for it: public void onSensorChanged(SensorEvent event) { float distance = event.values[0]; boolean active = (distance >= 0.0 && distance < PROXIMITY_THRESHOLD &&

问题 I am developing a hybrid application for Tizen Wearable 2.3. For the application, accelerometer and gyroscope sensor data is extracted and written to a file in native service application at a frequency of 100Hz. However, in certain trials I see that data is lost after few minutes upon switching off WiFi. For instance, if I record the data for 10 minutes, while keeping the app in background (display off) and turn off wifi during the fifth minute, the file shows data for only first 5 minutes,