RS485 to WiFi/Ethernet Module (Modbus/MQTT Gateway) Brand_McGraw-Hill which is great when you

which is great when you need a stable wired Ethernet connection on a Pi Zero

Outline dimension: 48mm × 33mm

7W stereo amp board plus two 3W 4ohm speakers will give you lots of boom and you don't need any extra blocking caps because the amplifier has differential inputs

1x cable gland (M12)

These buck regulators have five main connection points for five different electrical nodes: power good (PG)

RS485 to WiFi/Ethernet Module (Modbus/MQTT Gateway) Brand_McGraw-Hill which is great when youThis RS485 device data acquisitor IoT gateway is designed for an industrial environment. It combines multiple functions in one, including serial server, Modbus gateway, MQTT gateway and RS485 to HTTPD Client. With RS485, WiFi and Ethernet ports, the module has functions such as serial to WiFi, serial to Ethernet, Ethernet to WiFi and many others. With screw terminals for power input, it supports a 5~36V power supply. It is suitable for applications