SSD1306 Now with 64x48 for D1 Mini Oled Shield [SOLVED]

@fanoush you were (of course) correct. My code looks now like this and works flawlessly.

I'm going to post a modified version of the SSD1603.js module to github for @gordon with full compatibility with this new resolution as well as the other versions of course.

var C = {
    OLED_WIDTH                 : 64,
    OLED_CHAR                  : 0x40,
    OLED_CHUNK                 : 128
   };
   
   // commands sent when initialising the display
   var extVcc=false; // if true, don't start charge pump 
   var initCmds = new Uint8Array([
    0xAE, // 0 disp off
    0xD5, // 1 clk div
    0x80, // 2 suggested ratio
    0xA8, 63, // 3 set multiplex, height-1
    0xD3,0x0, // 5 display offset
    0x40, // 7 start line
    0x8D, extVcc?0x10:0x14, // 8 charge pump (need 0x14)
    0x20, 0x00, // 10 memory mode
    0xA1,  // 12 seg remap 1 (screen orientation)
    0xC8, // 13 comscandec () screen orientation change to INC to flip)
    0xDA, 0x12, // 14 set compins, height==64 ? 0x12:0x02,
    0x81, extVcc?0x9F:0xCF, // 16 set contrast //0x8F
    0xD9, extVcc?0x22:0xF1, // 18 set precharge
    0xDB, 0x40, // 20 set vcom detect
    0xA4, // 22 display all on
    0xA6, // 23 display normal (non-inverted)
    0xAF // 24 disp on
]);
   // commands sent when sending data to the display
   var flipCmds = [
        0x21, // columns
        0x20,0x5f,
        0x22, // pages
        0,7 /* (height>>3)-1 */];
   function update(options) {
     if (options) {
       if (options.height) {
         initCmds[4] = options.height-1;
         initCmds[15] = options.height==64 || options.height== 48 ? 0x12 : 0x02;
         flipCmds[5] = (options.height>>3)-1;
       }
       if (options.contrast!==undefined) initCmds[17] = options.contrast;
     }
   }


 
function start(){
  g.clear();
  g.drawString("Hello",0,0);
  g.drawLine(0, 20, g.getWidth(), 20);
  g.setFontVector(10);
  g.drawString("123456789",0,7);
  g.drawString("123456789",0,22);
  g.drawString("123456789",0,35);
  g.flip();
}

//D1.Mini OLED 64x48
let SCL = NodeMCU.D1;
let SDA = NodeMCU.D2;
I2C1.setup({scl:SCL,sda:SDA});
var g = connect(I2C1,start, { height : 48 });