How to retrieve data from tkinter DB from Ardino

Hi Guys,

I have this library in python did it with Tkinter DB and I want from Arduino to retrieve data from database.db file for example : first name, second name and use them in IF function in Arduino, how to do this?

import sqlite3
from Tkinter import *
import tkMessageBox
import sys
import os
import serial
import time

class DB:
    def __init__(self):
        self.conn = sqlite3.connect("database.db")
        self.cur = self.conn.cursor()
        self.cur.execute(
            "CREATE TABLE IF NOT EXISTS book (id INTEGER PRIMARY KEY, first TEXT, second TEXT, date INTEGER)")
        self.conn.commit()

    def __del__(self):
        self.conn.close()

    def view(self):
        self.cur.execute("SELECT * FROM book")
        rows = self.cur.fetchall()
        return rows

    def insert(self, first, second, date):
        self.cur.execute("INSERT INTO book VALUES (NULL,?,?,?)", (first, second, date))
        self.conn.commit()
        self.view()

    def update(self, id, first, second, date):
        self.cur.execute("UPDATE book SET firtst=?, second=?, date=? WHERE id=?", (first, second, date, id))
        self.view()

    def delete(self, id):
        self.cur.execute("DELETE FROM book WHERE id=?", (id,))
        self.conn.commit()
        self.view()

    def search(self, first="", second="", date=""):
        self.cur.execute("SELECT * FROM book WHERE first=? OR second=? OR date=?", (first, second, date))
        rows = self.cur.fetchall()
        return rows
    

db = DB()


def get_selected_row(event):
    global selected_tuple
    index = list1.curselection()[0]
    selected_tuple = list1.get(index)
    e1.delete(0, END)
    e1.insert(END, selected_tuple[1])
    e2.delete(0, END)
    e2.insert(END, selected_tuple[2])
    e3.delete(0, END)
    e3.insert(END, selected_tuple[3])


def view_command():
    list1.delete(0, END)
    for row in db.view():
        list1.insert(END, row)


def search_command():
    list1.delete(0, END)
    for row in db.search(first_text.get(), second_text.get(), date_text.get()):
        list1.insert(END, row)


def add_command():
    db.insert(first_text.get(), second_text.get(), date_text.get())
    list1.delete(0, END)
    list1.insert(END, (first_text.get(), second_text.get(), date_text.get()))


def delete_command():
    db.delete(selected_tuple[0])


def update_command():
    db.update(selected_tuple[0], first_text.get(), second_text.get(), date_text.get())

def helloCallBack():
        os.system('python twoservoslider.py')
        B=Tkinter.Button(top,text="hello",command= helloCallBack)
        B.pack()

window = Tk()

window.title("My Books")


def on_closing():
    dd = db
    if messagebox.askokcancel("Quit", "Do you want to quit?"):
        window.destroy()
        del dd


window.protocol("WM_DELETE_WINDOW", on_closing)  # handle window closing

l1 = Label(window, text="First Name")
l1.grid(row=0, column=0)

l2 = Label(window, text="Second Name")
l2.grid(row=0, column=2)

l3 = Label(window, text="Date")
l3.grid(row=1, column=0)

first_text = StringVar()
e1 = Entry(window, textvariable=first_text)
e1.grid(row=0, column=1)

second_text = StringVar()
e2 = Entry(window, textvariable=second_text)
e2.grid(row=0, column=3)

date_text = StringVar()
e3 = Entry(window, textvariable=date_text)
e3.grid(row=1, column=1)

list1 = Listbox(window, height=6, width=35)
list1.grid(row=2, column=0, rowspan=6, columnspan=2)

sb1 = Scrollbar(window)
sb1.grid(row=2, column=2, rowspan=6)

list1.configure(yscrollcommand=sb1.set)
sb1.configure(command=list1.yview)

list1.bind('<<ListboxSelect>>', get_selected_row)

b1 = Button(window, text="View all", width=12, command=view_command)
b1.grid(row=2, column=3)

b2 = Button(window, text="Search entry", width=12, command=search_command)
b2.grid(row=3, column=3)

b3 = Button(window, text="Add entry", width=12, command=add_command)
b3.grid(row=4, column=3)

b4 = Button(window, text="Update selected", width=12, command=update_command)
b4.grid(row=5, column=3)

b5 = Button(window, text="Delete selected", width=12, command=delete_command)
b5.grid(row=6, column=3)

b6 = Button(window, text="Close", width=12, command=window.destroy)
b6.grid(row=7, column=3)


window.mainloop()

Thanks for all

Thanks for quick response :slight_smile:

Could you recommend me some example how to achieve it please!

This Python - Arduino demo may help get you started.

Also have a look at the examples in Serial Input Basics - simple reliable ways to receive data. There is also a parse example to illustrate how to extract numbers from the received text.

The technique in the 3rd example will be the most reliable.

You can send data in a compatible format with code like this - you can do the same sort of thing with Python.

Serial.print('<'); // start marker
Serial.print(value1);
Serial.print(','); // comma separator
Serial.print(value2);
Serial.println('>'); // end marker

...R