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K-Ability Dev Kit

Dev Kit for Accessible Keyboards based on ESP-32

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This project is the evolution of K-Ability ( hackaday.io/project/160279-k-ability ), an open source accessible keyboard specific for touch screens. K-Ability Dev Kit aims to give makers and designers a set of tools to develop accessibility devices designed around the specific needs that characterizes each neuromuscular pathology and customized to the user.

K-Ability Dev Kit mainly consists of 4 parts:

  • an ESP32-based development board
  • design guidelines and modular body design
  • a preloaded firmware
  • a tool to customize the firmware

The development of the firmware and the first tests will be initially implemented on the TTGO T-Display board, then move on to the design of the dedicated card.

  • Hello world! First connection (video + code)

    dariocose07/04/2020 at 09:49 0 comments

    #include <Arduino.h>
    #include <TFT_eSPI.h>
    #include <SPI.h>
    #include <Wire.h>
    #include <Button2.h>
    #include "esp_adc_cal.h"
    
    //HID
    #include <BleMouse.h>
    
    #ifndef TFT_DISPOFF
    #define TFT_DISPOFF 0x28
    #endif
    
    #ifndef TFT_SLPIN
    #define TFT_SLPIN   0x10
    #endif
    
    #define TFT_MOSI            19
    #define TFT_SCLK            18
    
    
    #define TFT_BL          4  // Display backlight control pin
    #define ADC_EN          14
    #define ADC_PIN         34
    #define BUTTON_1        35
    #define BUTTON_2        0
    
    TFT_eSPI tft = TFT_eSPI(TFT_HEIGHT, TFT_WIDTH); // Invoke custom library
    
    //HID
    BleMouse bleMouse;
    boolean isConn = false;
    
    int touch_sensor_value_T0 =0;
    int touch_sensor_value_T1 =0;
    int tsv_ENTER   =0;
    int tsv_SELECT  =0;
    int tsv_CANCEL  =0;
    int tsv_LEFT    =0;
    int touch_sensor_value_T6 =0;
    int tsv_DOWN    =0;
    int tsv_RIGHT   =0;
    int touch_sensor_value_T9 =0;
    
    //! Long time delay, it is recommended to use shallow sleep, which can effectively reduce the current consumption
    void espDelay(int ms)
    {   
        esp_sleep_enable_timer_wakeup(ms * 1000);
        esp_sleep_pd_config(ESP_PD_DOMAIN_RTC_PERIPH,ESP_PD_OPTION_ON);
        esp_light_sleep_start();
    }
    
    void setup()
    {
        Serial.begin(9600);
        Serial.println("Start");
    
        Serial.println("Starting BLE work!");
        bleMouse.begin();
    
        tft.init();
        tft.setRotation(2);
        tft.fillScreen(TFT_BLACK);
        tft.setTextSize(2);
        tft.setTextColor(TFT_WHITE);
        tft.setCursor(0, 0);
        tft.setTextDatum(TL_DATUM);
        tft.drawString("Not connected",  70 , tft.height() / 2 );
    
        if (TFT_BL > 0) { // TFT_BL has been set in the TFT_eSPI library in the User Setup file TTGO_T_Display.h
             pinMode(TFT_BL, OUTPUT); // Set backlight pin to output mode
             digitalWrite(TFT_BL, TFT_BACKLIGHT_ON); // Turn backlight on. TFT_BACKLIGHT_ON has been set in the TFT_eSPI library in the User Setup file TTGO_T_Display.h
        }
    
    
        espDelay(5000);
    
    }
    
    void loop()
    {
        tsv_ENTER   = touchRead(T2);
        tsv_SELECT  = touchRead(T3);
        tsv_CANCEL  = touchRead(T4);
        tsv_LEFT    = touchRead(T5);
        tsv_DOWN    = touchRead(T7);
        tsv_RIGHT   = touchRead(T8);
        //manca up!!!
    
        if( bleMouse.isConnected() && !isConn) {
            isConn = true;
            tft.fillScreen(TFT_BLACK);
            tft.drawString("Connected",  70 , tft.height() / 2 );
        } else if(!bleMouse.isConnected() && isConn) {
            isConn = false;
            tft.fillScreen(TFT_BLACK);
            tft.drawString("Not connected",  70 , tft.height() / 2 );
        }
    
        if (isConn)
        {
            if(tsv_LEFT     > 5 && tsv_LEFT     < 30){bleMouse.move(-2, 0, 0);}
            if(tsv_RIGHT    > 5 && tsv_RIGHT    < 30){bleMouse.move( 2, 0, 0);}
            if(tsv_DOWN     > 5 && tsv_DOWN     < 30){bleMouse.move( 0, 2, 0);}
        }   
    
        delay(20);
    }

  • Modularity (test)

    dariocose06/16/2020 at 09:03 0 comments

View all 2 project logs

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