Shutting Down Write Exception

[VinealShiloh]

Hi Alan, I have been working on the pymata-aio to connect with arduino.Using arduino and Python Code i am able to blink some led's when i remove the connections and connecting again to arduino.I am getting the "Shutting down Write Exception" Why do i get this error? Is it because of "Ideal Time"? are there any specific reason for it

[MrYsLab]

Could you please copy your script and paste it here so I can see exactly what it is doing?

Also, what is QtPiFirmata.ino?

[VinealShiloh]

QtPiFirmata.ino is Modified Firmata of Standard Firmata according to our specs. We wrote the code for testing our Micro Controller which is Arduino based.The below code is just a snippet to test Analog Read functionality CODE SNIPPET

ANALOG READ Method

def Analog_Read(self):

    resAR = 0

    i = 0
    z = 0

    AnalogReadList_1 = []
    AnalogReadList_2 = []
    AnalogWriteList_1 = []

    #PIN CONFIG for ANALOG PINS (Ports 1-4)
    APin_0 = 0 #Port 1
    APin_1 = 1 #Port 2
    APin_2 = 2 #Port 3
    APin_3 = 6 #Port 4

    #PIN CONFIG for LED PINS (Ports 1-4)
    Led1 = 3
    Led2 = 9
    Led3 = 10
    Led4 = 11

    #Declare Analog Pins
    self.board.set_pin_mode(APin_0, Constants.ANALOG)
    self.board.set_pin_mode(APin_1, Constants.ANALOG)
    self.board.set_pin_mode(APin_2, Constants.ANALOG)
    self.board.set_pin_mode(APin_3, Constants.ANALOG)

    #Declare LED Pins
    self.board.set_pin_mode(Led1, Constants.OUTPUT)
    self.board.set_pin_mode(Led2, Constants.OUTPUT)
    self.board.set_pin_mode(Led3, Constants.OUTPUT)
    self.board.set_pin_mode(Led4, Constants.OUTPUT)

    #Enable Analog reporting (starts reading Analog values)
    self.board.enable_analog_reporting(APin_0)
    self.board.enable_analog_reporting(APin_1)
    self.board.enable_analog_reporting(APin_2)
    self.board.enable_analog_reporting(APin_3)

    #LDR Read 1 (When LEDs are OFF)
    a1= self.board.analog_read(APin_0)
    AnalogReadList_1.append(a1)
    b1= self.board.analog_read(APin_1)
    AnalogReadList_1.append(b1)
    c1= self.board.analog_read(APin_2)
    AnalogReadList_1.append(c1)
    d1= self.board.analog_read(APin_3)
    AnalogReadList_1.append(d1)

    #LEDs ON
    self.board.digital_write(Led1,1)
    self.board.digital_write(Led2,1)
    self.board.digital_write(Led3,1)
    self.board.digital_write(Led4,1)

    self.board.sleep(1)

    #LDR Read 2 (When LEDs are ON)
    a2= self.board.analog_read(APin_0)
    AnalogReadList_2.append(a2)
    b2= self.board.analog_read(APin_1)
    AnalogReadList_2.append(b2)
    c2= self.board.analog_read(APin_2)
    AnalogReadList_2.append(c2)
    d2= self.board.analog_read(APin_3)
    AnalogReadList_2.append(d2)

    #LEDs OFF
    self.board.digital_write(Led1,0)
    self.board.digital_write(Led2,0)
    self.board.digital_write(Led3,0)
    self.board.digital_write(Led4,0)

    print("\nANALOG READ\n")
    for z in range(len(AnalogReadList_1)):
        if AnalogReadList_1[z] < AnalogReadList_2[z]:
            print("Port",z+1,"-True")
            resAR += 1
            self.truthAR.append("TRUE")
        elif AnalogReadList_2[z] <= AnalogReadList_1[z]:
            print("Port",z+1,"-False")
            self.truthAR.append("FALSE")

    print("\n")

    if resAR == 4:
        self.results.append("True")
    elif resAR != 4:
        self.results.append("False")

    print("\n----------------ANALOG READ & WRITE - DONE-----------------\n")

[MrYsLab]

Thank you for the information. When I run any of my scripts I do not see the write exception. Could you please provide a script that will generate the error for me to reproduce the issue? Thanks.

[MrYsLab]

I am going to close this issue since I have not received example code to recreate it. Most likely your code is trying to send a command to the Arduino after you have called shutdown. If you would like additional help or wish to provide example code, please do that here and I can reopen the issue.