Poor man's flexible input device: keyboard sketched on paper and a touchscreen

Modules are now on https://www.espruino.com/modules:

• TouchRD - Resistive Touchscreen Directly connected to Espruino
  
  • Documentation - TouchRD - espruino.com/TouchRD
    
  • Code - [TouchRD - ]espruino.com/modules/TouchRD.js](https://www.espruino.com/modules/TouchRD.js)
    
• TouchKeyPad - Mapping touch position in grid to a key value:
  
  • Documentation - TouchKeyPad - espruino.com/TouchKeyPad
    
  • Code - TouchKeyPadRD - espruino.com/modules/TouchKeyPad.js ]
    
    

TouchRD Documentation includes generic code for calibration for Portrait and Landscape use.

The configuration(s) as used in post #1 were created with the generic calibration code and then copied into the modules folder of the sandbox in the Espruino IDE:

// TSRD26_104x132_cfg.js (c) 20181003_allObjects
// BuyDisplay.com 2.6" Resistive Touch Screen
// Portrait configuration 104 W x 142 H
// for TouchRD.js module
exports = 
  { X: 104
  , Y: 142
  , xt: 0.1117
  , yt: 0.0854
  , xc: 0.5067
  , yc: 0.4876
  , xd: 0.00736
  , yd: 0.00553
  };

// TSRD26_142x104_cfg.js - 20181003_allObjects
// BuyDisplay.com 2.6" Resistive Touch Screen
// Landscape configuration 142 W x 104 H
// for TouchRD.js module
exports = 
  { X: 142
  , Y: 104
  , xm: 5
  , ym: 5
  , xt: 0.0822
  , yt: 0.0966
  , xc: 0.4694
  , yc: 0.4960
  , xd: 0.00534
  , yd: 0.00744
  };