Multi USB/RS232/RS485/TTL Converter Brand_EMSL 2W from a standard NeoPixel

2W from a standard NeoPixel

Bracket Assembly Bolt(M 2

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

so you can connect to the Internet using Espruino

https://github

Multi USB/RS232/RS485/TTL Converter Brand_EMSL 2W from a standard NeoPixelMultiplexer 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