Has RXD, TXD signal indicator light, monitor send and receive status.
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Switching: 5V/3.3V/2.5/1.8V. Interfaces: USB to ttls port.
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Has RXD, TXD signal indicator light, monitor send and receive status.
eBay
Has RXD, TXD signal indicator light, monitor send and receive status.
eBay
Ax input 3.3V TTL level,Bx will output 5V TTL level. Ax input 5V TTL level,Bx will output 3.3V TTL level. Instructions:( for example 3.3V, 5V system conversion).
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USB to Serial Conversion: Converts USB to FOR TTL /CMOS level signals for seamless communication with serial devices. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.
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1 UART Serial Port to RS485 Converter. Type:TTL turn RS485. The module is fully considered mine design,it can play a very good anti-jamming and anti-lightning effect, more secure. With RXD, TXD signal indicator light, monitor send and receive status.
eBay
Has RXD, TXD signal indicator light, monitor send and receive status.
eBay