Instructions for using python file
TVRTest1.py

The file can be imported into a robot program to provide 
4 variables that can be set by a TV remote, 
and saved to (and read from) file "params. py".

import TVRTest1


The TVRTest program checks the 4 switches (sometimes used for setting speed).
0-130 : program does nothing.
150: TVR sets the values from params.py
140: TVR waits for user input before normal program runs.

The 4 data items in params.py are
basespeed, 
efactor, 
dfactor, 
count. 


It is best to copy values from these to your own values in your program.
    e.g. 
basespeed = TVRTest1.basespeed
mult = TVRTest1.efactor/100
dfactor = TVRTest1.dfactor
stopcount = TVRTest1.count

Using the TV remote controller. 
===============================
After switch-on, if TVRTest1 is running, it outputs a long pulse on the LED. 
Respond by pressing 'mute'  once or twice until a short pulse is returned on the LED. 
This is because the Infra-red adaptor can output rubbish to the Pico when the robot powers up. 
To set the speed:-
Key in a value e.g. '7' '5', and save it on basespeed by pressing 'Vol+'. 

To set other data items:-
Use 'Vol-' for efactor 
  - 'ch+' for dfactor, and 
  - 'ch-' for count. 

But if you press one of these 4 keys without entering a number
 it will just print the current value

To display the current value of all 4 variables, press 'av'

To save all values to file "params.py", press 'OK'. 
To re-read the values from "params.py", press the green key
( it reads this file on startup)

To exit TVRTest1 and continue with your program,
 - press the power button (top right). 

If you run this on Thonny, you will see the actions printed
on-screen. 


John Fisher 
28/3/2022