您好,并提前感谢您的时间,
我正在尝试使用pySerial和Tkinter通过python脚本控制连接到我的Arduino的一系列继电器。问题是,虽然我知道我的代码连接到我的Arduino(我听到当我使用Arduino软件上传代码时得到的同样的继电器颤动),我无法让继电器响应我发送的命令Tkinter GUI。这是我的python代码:
ser = Serial(port=3, timeout=1, writeTimeout=1, baudrate=9600) # ensure non-blocking
class Application(Frame):
print("Arduino Dish Control Ready")
def __init__(self, parent): # create constructor
Frame.__init__(self, parent) # define parent
self.parent = parent # save reference of parent widget
self.initUI() # delegate creation of the initUI() method
def initUI(self):
self.parent.title("Dish Control") # title of window
Style().configure("TButton", padding=(0, 5, 0, 5), font='serif 10')
self.columnconfigure(0, pad=4)
self.columnconfigure(1, pad=4)
self.columnconfigure(2, pad=4)
self.columnconfigure(3, pad=4)
self.columnconfigure(4, pad=4)
self.rowconfigure(0, pad=3)
self.rowconfigure(1, pad=3)
self.rowconfigure(2, pad=3)
self.rowconfigure(3, pad=3)
def UP(): # define the UP command.
ser.write(str(32)) # convert "32" to ASCII and send it via serial port (USB) to arduino.
print ser.write(str(64))
# sleep(0.1)
up = Button(self, text="Up", command=UP) # create button UP and set the command.
up.grid(row=0, column=1) # define position of UP button.
self.pack()
以下是相关的Arduino代码:
void loop(){
if(Serial.available() > 0){
Serial.begin(9600);
int inByte = Serial.read(); //read the incoming data
Serial.print("I received: ");
Serial.println(inByte, DEC);
if(Serial.read() == 32){//If the serial reads 32...
digitalWrite(8, LOW); //Motor Select Low
digitalWrite(9, LOW);
digitalWrite(10, LOW); //Motor 1 Low
digitalWrite(11, LOW);
digitalWrite(12, LOW); // Motor 2 Low
digitalWrite(13, LOW);
digitalWrite(6, HIGH); //Motor Power High
digitalWrite(7, HIGH);
}
}
}
很抱歉包括这么多,但我不确定我的错误在哪里。
编辑:当我在python代码中只包含ser.write(32)而不是ser.write(str(32))时,我已经请求包含错误的回溯:
Traceback (most recent call last):
File "C:\Python27\lib\lib-tk\Tkinter.py", line 1536, in __call__
return self.func(*args)
File "C:/Users/Radio Astro 4/PycharmProjects/untitled/DishControl.py", line 46, in UP
ser.write(32) # convert "1" to ASCII and send it via serial port (USB) to arduino.
File "C:\Python27\lib\site-packages\serial\serialwin32.py", line 283, in write
data = to_bytes(data)
File "C:\Python27\lib\site-packages\serial\serialutil.py", line 75, in to_bytes
for item in seq:
TypeError: 'int' object is not iterable
答案 0 :(得分:1)
Arduino documentation说明了Serial.read()
命令:
返回
可用的传入串行数据的第一个字节(如果没有数据,则为-1) -
int
您正在发送字符串" 32"对于微控制器,这实际上是两个字节[51, 50]
被发送。检查if(Serial.read() == 32)
时,检查字节值 32,但永远不会发送字节值32(ASCII空格)。
更改send命令直接传输字节值:
ser.write(32) # without str()
Serial.write()
将(byte-)字符串作为参数,因此您必须执行以下操作:
ser.write(bytes([32])) # convert the list `[32]` to a bytestring