FT232RL USB to TTL Serial Converter Module for 1.8V/3.3V/5V Level Download Line

HM-10 CC2541 CC2540 Bluetooth to UART Transceiver Module Low Energy Peripheral

125K EM4100 RFID Card Reader Module RDM6300 ID RF UART Output for Arduino

FT232RL USB to TTL Serial Port Module for 1.8V 3.3V 5V Level Download Line

HM-10 CC2541 CC2540 Bluetooth to UART Transceiver Module Low Energy Peripheral

SC16IS750 Single UART I2C-Bus/SPI Interface 3.3V or 2.5V Operation

8-Channel IIC UART SPI TTL Logic Level Converter 5V/3.3V Bi-Directional Module

1Stks SC16IS750 Single UART w/ I2C-Bus/SPI Interface For Industrial Control NEW