Constantly gives out "0", if you do not power the UART - "255", and everything is even for it, so that it would not be sent over the UART.

s = "HTTP/1.1 200 OK\r\nContent-Type: text/html\r\n\r\n<!DOCTYPE HTML>\r\n<html>Sireal = "+String(Serial.read())+"</html>\r\n\r\n";

Written on the Arduino IDE for ESP

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    Transmission parameters: speed, parity, number of bits (including stop) checked? The oscilloscope shows on the Tx leg that the data transfer over the 232 is really going? - Vladimir Martyanov
  • The oscilloscope shows the data transfer goes both ways, but ESP does not read the data. - dodo shurygin
  • Then the transmission parameters - Vladimir Martyanov

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