arduino

问题 I'm doing a project with Arduino and Android application. Here's how it goes, send from the application request "a=11&b=22&d=33" (http://192.168.0.17/?a=11&b=22&d=33), arduino read and return "Data_received" and I use it to do something (down is part of code from app). And everything is going well. But I do not know how to do reversed now, I know how to send the request from arduino to server, but I don't know how to receive in android app to get a = 11, b = 22, c = 33. Android studio code to

问题 I'm working with an Arduino UNO in my first attempt to use the OO in Wiring. I just have a question which I need help with; I'm using a class for a DHT22 sensor from freetronics, found here http://www.freetronics.com/products/humidity-and-temperature-sensor-module. Say I have a class i made called Sensor, where DHT is the library for the freetronics sensor, and DHT dht(5, DHT22) Initialises the sensor on pin 5 (which could be any digital pin): #include "arduino.h" #include <DHT.h> DHT dht(1,

问题 I'm working with an Arduino UNO in my first attempt to use the OO in Wiring. I just have a question which I need help with; I'm using a class for a DHT22 sensor from freetronics, found here http://www.freetronics.com/products/humidity-and-temperature-sensor-module. Say I have a class i made called Sensor, where DHT is the library for the freetronics sensor, and DHT dht(5, DHT22) Initialises the sensor on pin 5 (which could be any digital pin): #include "arduino.h" #include <DHT.h> DHT dht(1,

问题 Hi I trying to receive data from Arduino to Android phone. The Android coding is below: App crashed due to looper.prepare() in the beginlistendata() function The Arduino code is below: void setup() { Serial.begin(9600); eHealth.initPulsioximeter(); //Attach the inttruptions for using the pulsioximeter. PCintPort::attachInterrupt(6, readPulsioximeter, RISING); } void loop() { delay(500); Serial.print("PRbpm : "); Serial.print(eHealth.getBPM()); Serial.print(" %SPo2 : "); Serial.print(eHealth

问题 I need to use a sparkfun breakout board ADXL345 to detect when my motor system has stopped vibrating. I am also using a Sparkfun RedBoard (Arduino uno). Things I am doing to configure for this behavior: enable INACTIVITY event route INACTIVITY events to INT 1 (pin 2 on the RedBoard) raise INACTIVITY interrupt without delay set low threshold for INACTIVITY (rule out too high of a setting) INACTIVITY considers all axes clear interrupt data register Having done all these things I do not receive

问题 I need to use a sparkfun breakout board ADXL345 to detect when my motor system has stopped vibrating. I am also using a Sparkfun RedBoard (Arduino uno). Things I am doing to configure for this behavior: enable INACTIVITY event route INACTIVITY events to INT 1 (pin 2 on the RedBoard) raise INACTIVITY interrupt without delay set low threshold for INACTIVITY (rule out too high of a setting) INACTIVITY considers all axes clear interrupt data register Having done all these things I do not receive

问题 I just got a new Sim900 and connected to an Arduino Uno. I used the code below to send a text to myself. I received the text on my cell, but I did not receive any echo on my serial monitor (ie. "OK"). I have tried swapping the RX/TX pins and different baud rates with no success. void setup() { Serial.begin(9600); //Baud rate of the GSM/GPRS Module Serial.println(""); delay(2000); Serial.println("AT+CMGF=1"); delay(1000); Serial.println("AT+CMGS=\"+120########\""); //Number to which you want

问题 I am just starting with arduino and I already love it. One of the projects I would like to try deals with the follwing pseudo-code flow: def switch(): set_pin_2_to_HIGH wait_10_seconds set_pin_2_to_LOW loop() // some time sensitive code, which should be executed on a // reasonably regular cycle if_pin_1_is_HIGH: switch() // some more code where the state of pin_2 will be tested, that code also need // to run in a reasonably regular cycle I therefore need the loop to loop without stopping 10

问题 Anyone have a code to convert char array to HEX? And return back to the actual results? Because when I try to use this: char data[]="hello word"; Serial.print(data,HEX); then will give me an overload error. 回答1: For brute force, you could try: for (size_t i = 0; i < sizeof(data) - 1) { Serial.print(static_cast<unsigned int>(data[i]), HEX); } In the above snippet, each character is casted to an integer to get the internal representation value, then output. There may be more efficient methods,

问题 I have a processing program that is supposed to read the data from a serial port created by an arduino uno. I got the program to work perfectly in Processing but not in Eclipse. I added core.jar serial.jar and jssc.jar to my java project's build path, but am still getting an error calling the port with Serial.list()[0] . I have seen similar questions on here, but none have helpful answers. I don't know if I'm missing something or need to import a different jar file to my build path. import