Hello, I am an electronics engineer with over 28 years experience, I could develop something for you that would suit.
I propose using a strain gauge sensor with necessary signal conditioning fed into a small micro controller. This could connect to the computer either via USB or Bluetooth depending on how its designed. I would then write a small C# .NET application to read the sensor and save the results to an excel or plain text file.
As you mention just 0 or 1 for now, however if you wish I could make it more meaningful by returning the exact pressure results if required.
My bid price includes a working prototype. Let me know if you have any questions.
Thanks,
Ken.