Electronics Projects with the ESP8266 and ESP32: Building Web Pages, Applications, and WiFi Enabled Devices

© Neil Cameron 2021

N. CameronElectronics Projects with the ESP8266 and ESP32https://doi.org/10.1007/978-1-4842-6336-5_16

16. Signal generation

Neil Cameron¹  

(1)

Edinburgh, UK

 

Telecommunication uses digital signals to transfer information. For example, the instruction Serial.print("12AB") transmits the ASCII code for each character (see Figure 16-1) in binary format with the microcontroller UART (Universal Asynchronous Receiver-Transmitter). ASCII (American Standard Code for Information Interchange) is an 8-bit character encoding standard for electronic communication, with the least significant bit (LSB) transmitted first. For example, the letter A has ASCII code of 65, which is B01000001 LSB or (1 × 2⁶ + 1 × 2⁰). The transmitted <S> and <T> bits ...