GitHub - donatmarko/kmtronic-usb-relaybox-http: :snake: Python3 middleware for KMTronic USB 8 channel relay boxes to control the relays remotely with HTTP requests.
KMtronic Ltd: USB Relay Controller One Channel
USB to RS485 BUS | Arduino sensors, Arduino rs485, Arduino
KMTronic USB 8 Channel Relay Board DIN rail | eBay
KMTronic USB One Relay Controller, RS232 Serial controlled, BOX | eBay
KMTronic LAN Ethernet IP 8 channels Relay board WEB BOX, with DIN rail clips | eBay
KMtronic Ltd: USB Eight Channel Relay Controller - RS232 Serial controlled - 12V