Multi USB/RS232/RS485/TTL Converter Brand_EMSL Raspberry Pi model A+ v1

Raspberry Pi model A+ v1 (the most energy-efficient model available)

you need to separate or isolate your earth ground (through the USB connector to the computer to the power plug) from your circuit for high voltage

up to 3Vpp

Waterproof Level: weatherproof

The FIDO2 U2F Token from Key-ID is a compact USB security token that adds a strong second factor to user logins for the growing number of online services that support this new technology

Multi USB/RS232/RS485/TTL Converter Brand_EMSL Raspberry Pi model A+ v1Multiplexer has a set of interfaces for a variety of multi function adapter plates. It supports USB, TTL, RS232, RS485 interfaces between the system conversions. What's more powerful is that it also supports one input multiple outputs, which greatly facilitates the communication between various controllers. Tip: Multiplexer board is divided into A and B interfaces. The signal can be convertered between A and B. The signal in the same interface can't