- RS-232C (or just shortened to RS-232)
- EIA-232-D (1987)
- EIA/TIA-232-E (1991)
15m or less
Do you need a higher-level communication protocol that works over a UART connection? See the SerialFiller library on GitHub (written in C++). SerialFiller uses a publish/subscribe mechanism and works well on point-to-point serial connections such as UART.
The pinout of a typical Analog Devices RS-232 to UART transceiver is shown below.
Another example of a RS-232 to CMOS UART converter is the MAX3221IDBE4. It supports an auto-shutdown feature based on the voltage-level of the receiving RS-232 line.
Cheap Discrete-Part RS-232 To TTL Converter
A RS-232 to TTL logic-level converter can be made out of a few discrete components. The schematic shown below uses some clever circuitry, including a charge-pump like circuit, to generate the negative voltage required for RS-232 transmission back to the computer.
Posted: October 29th, 2015 at 2:55 pm
Last Updated on: August 30th, 2017 at 5:19 am