Software para guiar picking en almacén usando un lector de códigos de barras

I need to develop a minimalistic piece of software that allows me to pick orders from a warehouse using a bar code scanner.
The software must have two basic functions:

1.    Direct the user on what items to pick in order to fulfill an order
2.    Tell the user the location of any item by scanning it with the scanner

The hardware that I will be using is a JRCH handheld running on Android. You can find out more about it in the following link:
https://www.amazon.com/JRHC-Handheld-Warehouse-Inventory-Management/dp/B0BDQFNV8N

The inputs of the software to be developed are two excel files:

File #1: product catalogue. It contains the following info:

product code    product description    warehouse location
123456789121    product #1    a1
123456789122    product #2    b2
123456789123    product #3    c5

file #2: picking list. This is an example of this file:

order code    product code    quantity to pick
3456789121    123456789121    3
3456789121    123456789123    1
3456789122    123456789122    5
3456789122    123456789123    2

the software must be able to direct the user on the picking of the orders by executing the following steps:

1.    Prompt user to scan the order code.
2.    If the order code scanned is found on file #2, the user will see the number of unique products contained in the order as well as the total items in the order. An example based on the file #2 described above is:

Order: 3456789122    Products: 2    Item Qty: 7

    If the order code scanned is not found on file #2, an error message is displayed for 2 seconds and user is then directed to step 1.
order not found

3.    Display info about the first product of the order to be picked:
Product: 123456789122
Description: Product #2
Location: B2
Quantity: 5

4.    Wait for user to scan the product 5 times. If the right product is scanned the right number of times it shows a green check mark for 2 seconds and the next item to pick is displayed.

5.    If a wrong product is scanned or it is scanned a different number of times an error messaged must be displayed to inform the user that the picking is incorrect. The user then can choose to skip the item or try the scanning of the product once again.


ERROR
Wrong Product/Incorrect quantity picked

              try again                                  skip

6.    When all of the items of the order have been successfully picked, the message “order completed” is displayed with a “scan next order” button that will direct the user to step 1 of this process.

On a separate module the program must show the user the location of any item just by scanning it. The following screen will show should the item be present in the product catalogue:
Product: 123456789122
Description: Product #2
Location: B2

If the scanned item is not in the product catalogue an error message must be displayed
ERROR
Product not found in catalogue

              try again                                  exit

this is all the program has to do. Important to note that the program does not have to track inventory levels. Also a minimalist, no frills MVP is enough as long as the functionality described above is accomplished.