You will learn and know what I am talking about: DCE, DTE, DSR, DTR, TxD, RxD, CTS, RTS, DTR, RI, CarrierDetect, UAR/T’s, TTL voltage levels being reverse to RS232 voltage levels, a ‘0’ being negative RS232 voltage up to 15V, a ‘1’ being as low as -15V. If you are new to the serial world and want to use these devices and understand how, study the next chapter. And so common nowadays in Arduino and ESP8268, ESP32 and even Raspberry Pi world. Terminology, asynchronous serial format, voltage levels, start bits, stop bits, 7 or 8 data bits, hardware and software handshake, and the way it is abused in many of these devices. These are all descendants of the EIA RS232 standard in some way. Most not documented or unsure if the voltage levels are 3.3V or 5V. So I have a collection of those USB to serial adapters, some with cables and DB-9 connectors, some with cable and Dupont connectors, and some USB TTL type connectors on a PCB with male or female Dupont pin connectors for USB-A, mini or micro USB.
0 kommentar(er)
