Wifi module not found????

Uncaught No 'ready' after AT+RST usually just means that the module isn't responding. It's probably:

• It's not powered up - there should be a red LED lit on it if all is ok
  
• You've got TX and RX round the wrong way - I can't really see from your diagram what goes where
  
• You have the wrong baud rate because your board has a different firmware - use the test code from http://www.espruino.com/ESP8266
  
• It's booted up in bootloader mode.
  
• It's unhappy with the power - as DrAzzy says, a capacitor might help
  
  

It's probably best to start off using this code from the link above:

var serial = Serial2;
var pins = { rx: A3, tx : A2 };
function test(baud) {
  serial.removeAllListeners();
  var l="";
  serial.on('data', function(d) {l+=d;});
  serial.setup(baud, pins);
  serial.write("AT+GMR\r\n");
  setTimeout(function(){console.log(JSON.stringify(l));},800);
}
digitalWrite(B9,1); // enable on Pico Shim V2
setTimeout(function() { test(9600); }, 2000);
setTimeout(function() { test(115200); }, 3000);
setTimeout(function() { test(57600); }, 4000);
setTimeout(function() { console.log("Done!"); }, 5000);

It'll just try and communicate with the board using different baud rates, so might help to narrow it down

also: to format code in the forum, just add 3 backticks before and 3 after (each on a new line, with a blank line before and after) - just google 'markdown' for some examples.