This is PL2303 CH340G USB To TTL(Serial) Converter For Arduino Nano Raspberry Pi USB to TTL / USB-TTL /STC microcontroller programmer / PL2303 in nine upgrades plate with a transparent cover Compatible with ARDUINO, RASPBERRY PI, AVR, PIC, 8051, etc. This USB-TTL converter is based on CH340G USB to Serial TTL converter chip. The module can be used for 3.3V logic level signals, and has the option to switch from 5V to 3.3V logic level using a 2 pin shunt (shortening jumper for specific pins) supplied with the module.

MQ-5 Natural/ LPG Gas Sensor Module are used in gas leakage detecting houses and industries. Sensitive for LPG, natural gas, coal gas.

Features: Sensitive for LPG, propane, hydrogen Output voltage boosts along with the concentration of the measured gases increases Fast response

The USB to RS485 Converter Adapter module support WIN7 XP Vista Linux Mac OS provides an easy-to-use RS485 interface by means of a Virtual Com Port on the user’s system. There are no command structures, whatever is sent to the Virtual Comm Port is automatically converted to RS485 and vice versa. The module is completely self-powered from the USB bus. Controlling / Communicating with RS-485 devices from your PC has never been easier! This device is plug-and-play. It shows up as a serial/com port and is accessible from applications or hyper-terminal.