Null modem cables, also referred to as "crossover" cables, allow two serial devices to communicate with each other without using a modem or other communication device in between. In null modem cables the TXD (Transmit) pin on one device is connected to the RXD (Receive) pin on the other, and vice versa, hence the term crossover. This is a Female to Female DB9 9-Pin (RS232) Null Model Cable. You can use this cable to connect our Serial HAT to a male serial device. Features * Null Modem Crossover Serial Cable * DB9 (9 Pin) RS232 * Length: 2m * Colour: Grey * Female to Female https://elecena.pl/product/22717163/null-modem-cable-f-f-db9-rs232-2m 2023-03-07 https://elecena.pl/product/22717163/null-modem-cable-f-f-db9-rs232-2m 2023-12-27 https://elecena.pl/product/22717163/null-modem-cable-f-f-db9-rs232-2m 2024-09-19 https://elecena.pl/product/22717163/null-modem-cable-f-f-db9-rs232-2m 2024-11-29 https://elecena.pl/product/22717163/null-modem-cable-f-f-db9-rs232-2m 2024-11-30 https://elecena.pl/product/22717163/null-modem-cable-f-f-db9-rs232-2m 2025-11-28 https://elecena.pl/product/22717163/null-modem-cable-f-f-db9-rs232-2m 2025-11-29