我正在尝试我的ESP-32向Raspberry pi 3 B +发送高输出。我已经尝试过使用不同的引脚，但是结果始终是相同的。树莓的东西他总是得到很高的投入。目标是当esp 32发送高输出时，树莓应该拍照。 在您问ESP应该如何知道他何时发送输出之前。好吧，这是他检测到物体的时候。
在这里您可以看到我的python代码
import time
import os # import the time
from picamera import PiCamera # import image from the camera into the Raspberry
import RPi.GPIO as GPIO
GPIO.setmode(GPIO.BCM) # define pins
GPIO.setup(11, GPIO.IN) # setup pin 18 as input
if __name__=='__main__':
#Variable
cam = Picamera() # makes the variable cam
while True:
if(GPIO.input(11) == GPIO.HIGH):
#Define how newimagen is made of (Variable) # make the variable fname which give us the date and Time
os.chdir('/home/pi/Desktop/image/') # Define where we are working now
images = [i for i in os.listdir(os.getcwd()) if i.lower().startswith('image')] # define what images is :
# os.listdir returns a list containing of the entries in the directory os.getcwd...
# os.getcwd returns the current working directory of a process
if images:
newest = max(images, key=os.path.getmtime) # max() is a method that returns the largest item of sth
# os.path.getmtime return the time of last modification
else:
newest = 'image0.jpg'
number = int(''.join([i for i in newest if i.isdigit()])) #number is the number of the newest image : image1 --> number = 1. This method look up if there is an image and which number it has
newimagen = 'image'+str(number+1)+'.jpg' # newimagen is the variable that decide which image it will be(image1 or image2...)
#Camera Code changing
cam.resolution = (2592,1944) # method to change the resoltuion
#Main Code
cam.capture('/home/pi/Desktop/image/'+newimagen) # method that take a photo and then save it on the local desktop as the name of newimagen
这是我的Arduino代码
// Define SensorS pins
#define trigPin 15
#define echoPin 2
//Define SensorXL pins
#define trigPinXL 14
#define echoPinXL 13
//Define Raspberry Pin
#define RaspiPin 26
//Define Motor pins
#define motorIn3 16 //Input 3
#define motorIn1 17 //Input 1
#define motorIn4 18 //Input 4
#define motorIn2 19 //Input 2
// Defines variables
long duration;
int distance;
// Define ActivateDistance
const int activateDistance = 40;
const int activateDistance2 =40;
void setup()
{
// Sets the trigPin as an Output
pinMode(trigPin, OUTPUT);
pinMode(trigPinXL, OUTPUT);
// Sets the echoPin as an Input
pinMode(echoPin, INPUT);
pinMode(echoPinXL, INPUT);
// sets the Motorpins as outputs:
pinMode(motorIn1, OUTPUT);
pinMode(motorIn2, OUTPUT);
pinMode(motorIn3, OUTPUT);
pinMode(motorIn4, OUTPUT);
//Sets Raspberry Pin as output
pinMode(RaspiPin, OUTPUT);
// Starts the serial communication
Serial.begin(9600);
}
void stop()
{
// stop motor without duration
Serial.println("STOP");
digitalWrite(motorIn1, LOW);
digitalWrite(motorIn2, LOW);
digitalWrite(motorIn3, LOW);
digitalWrite(motorIn4, LOW);
}
void left(int duration)
{
//Motor goes to left
Serial.println("LEFT");
digitalWrite(motorIn1, LOW);
digitalWrite(motorIn2, HIGH);
digitalWrite(motorIn3, HIGH);
digitalWrite(motorIn4, LOW);
delay(duration);
stop();
}
void right(int duration)
{
//Motor goes to left
Serial.println("RIGHT");
digitalWrite(motorIn1, HIGH);
digitalWrite(motorIn2, LOW);
digitalWrite(motorIn3, LOW);
digitalWrite(motorIn4, HIGH);
delay(duration);
stop();
}
void forward(int duration)
{
//Motor goes forward
Serial.println("FORWARD");
digitalWrite(motorIn2, HIGH);
digitalWrite(motorIn4, HIGH);
digitalWrite(motorIn3, LOW);
digitalWrite(motorIn1, LOW);
delay(duration);
stop();
}
long get_distance(void)
{
//get distance from sensor
// Clears the trigPin
digitalWrite(trigPin, LOW);
delayMicroseconds(2);
// Sets the trigPin on HIGH state for 10 micro seconds
digitalWrite(trigPin, HIGH);
delayMicroseconds(10);
digitalWrite(trigPin, LOW);
// Reads the echoPin, returns the sound wave travel time in microseconds
duration = pulseIn(echoPin, HIGH);
// Calculating the distance
distance = duration * 0.034 / 2;
return distance;
}
long get_distanceXL(void)
{
//get distance from sensor
// Clears the trigPin
digitalWrite(trigPinXL, LOW);
delayMicroseconds(2);
// Sets the trigPin on HIGH state for 10 micro seconds
digitalWrite(trigPinXL, HIGH);
delayMicroseconds(10);
digitalWrite(trigPinXL, LOW);
// Reads the echoPin, returns the sound wave travel time in microseconds
duration = pulseIn(echoPinXL, HIGH);
// Calculating the distance
distance = duration * 0.034 / 2;
return distance;
}
int turn = 0;
void loop()
{
// check sensor
if (get_distance() <= activateDistance)
{
Serial.println("Found an Obstacle!!!");
// go right for 1 second
right(1000);
while(turn<4)
{
//turn on the Raspberry Pin
digitalWrite(RaspiPin, HIGH);
if(get_distanceXL()>activateDistance2)
{
//go left for 1 second
left(1000);
forward(1500);
turn = turn + 1;
}
else
//go forward for 1 second
forward(1000);
}
//turn off the Raspberry Pin
digitalWrite(RaspiPin, LOW);
}
else
// go forward for 1 second
forward(1000);
}
我打开了终端，看到了这个问题。我不确定这是否可以解决我的问题：
mmal: mmal_vc_port_enable: failed to enable port vc.null_sink:in:0(OPQV): ENOSPC
mmal: mmal_port_enable: failed to enable connected port (vc.null_sink:in:0(OPQV))0x1d13d20 (ENOSPC)
mmal: mmal_connection_enable: output port couldn't be enabled
Traceback (most recent call last):
File "/home/pi/Desktop/camera.py", line 12, in <module>
cam = PiCamera() # makes the variable cam
File "/usr/lib/python2.7/dist-packages/picamera/camera.py", line 433, in __init__
self._init_preview()
File "/usr/lib/python2.7/dist-packages/picamera/camera.py", line 513, in _init_preview
self, self._camera.outputs[self.CAMERA_PREVIEW_PORT])
File "/usr/lib/python2.7/dist-packages/picamera/renderers.py", line 558, in __init__
self.renderer.inputs[0].connect(source).enable()
File "/usr/lib/python2.7/dist-packages/picamera/mmalobj.py", line 2212, in enable
prefix="Failed to enable connection")
File "/usr/lib/python2.7/dist-packages/picamera/exc.py", line 184, in mmal_check
raise PiCameraMMALError(status, prefix)
picamera.exc.PiCameraMMALError: Failed to enable connection: Out of resources
答案 0 :(得分：1)
您的逻辑中有一个小错误：
13:45相反，您应该检查引脚11上是否有任何输入，例如
if(GPIO.input(11) == GPIO.HIGH)
根据是否有任何输入（当前）通过PIN 11，哪个将返回if(GPIO.input(11)){
// the rest f you logic
}
或True。
False应该将引脚设置为HIGH，而不是检查引脚是否正在输入。