Using tkinter and python to control arduino -
i have posted question before, , user enough answer it. used suggestions , found code not working @ all, after researching , tinkering it, came impasse. here want do:
i want control 2 arduinos using serial connection between arduinos , raspberry pi , using python control them. using gui interface , tkinter library create buttons.
the original problem information go through arduino when user stopped pressing button , needed information sent button pressed , continuously until button released. member suggested using lambda.
although did not work proposed, feel might have had right idea, here code came after suggestion.
import serial running = true ser = serial.serial('/dev/ttyusb0') def send_data(self): if self.char not none: ser.write(self.char) #run again in 100ms. here control how fast #to send data. first parameter after number #of milliseconds wait befor calling function self.job=self.after(100,self.send_data) class application(frame): """defining remote control buttons""" def __init__(self,master): self.char = [] self.job = [] self.send_data = [] """initialize frame""" frame.__init__(self,master) self.grid() # how many times has user clicked button self.create_widgets() def set_char(self,char): self.char=char def create_widgets(self): """creates 4 buttons move servos""" #create 'up' button self.button1=button(self,text="up") self.button1.bind("<buttonpress-1>",lambda x:self.set_char('1')) self.button1.bind("<buttonrelease-1>",lambda x:self.set_char(none)) self.button1.grid() send_data(self) #create 'down' button self.button2=button(self,text="down") self.button2.bind("<buttonpress>",lambda x:self.set_char('2')) self.button2.bind("<buttonrelease>",lambda x:self.set_char(none)) self.button2.grid() #create 'left' button self.button3=button(self,text="left") self.button3.bind("<buttonpress-3>",lambda x:self.set_char('3')) self.button3.bind("<buttonrelease-3>",lambda x:self.set_char(none)) self.button3.grid() #creeate 'right' button self.button4=button(self,text="right") self.button4.bind("<buttonpress-4>",lambda x:self.set_char('4')) self.button4.bind("<buttonrelease-4>",lambda x:self.set_char(none)) self.button4.grid() #main root = tk() root.title("remote control") root.geometry("250x250") app = application(root) root.mainloop()
your theory workable, has implementation issues. hacked smaller test original code , fixed several mistakes. 1 writes screen few of don't have arduino attached our computers , has 1 button, shows how should work.
import sys tkinter import * tkinter.ttk import * # mock serial class class mockser(object): def __init__(self): self.colcount = 0 def write(self, data): sys.stdout.write(data) self.colcount += 1 if self.colcount > 78: sys.stdout.write('\n') sys.colcount = 0 sys.stdout.flush() class application(frame): """defining remote control buttons""" def __init__(self, master, writer): frame.__init__(self, master) self.writer = writer self.char = none self.grid() # how many times has user clicked button self.create_widgets() def send_data(self): if self.char not none: self.writer.write(self.char) #run again in 100ms. here control how fast #to send data. first parameter after number #of milliseconds wait befor calling function self.after(100,self.send_data) def set_char(self,char): self.char=char def create_widgets(self): """creates 4 buttons move servos""" #create 'up' button self.button1=button(self,text="up") self.button1.bind("<buttonpress-1>",lambda x:self.set_char('1')) self.button1.bind("<buttonrelease-1>",lambda x:self.set_char(none)) self.button1.grid() # start send_data poll self.send_data() root = tk() root.title("remote control") root.geometry("250x250") writer = mockser() app = application(root, writer) root.mainloop() the code doesn't consider real world problems such serial port closing or queue filling, start.
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