Welcome to a new Voltlog, in this video I’m going to show how to flash your Shelly relay with Tasmota or ESPHome, the easy way, using the VoltLink USB to serial converter. What is a Shelly relay you might ask? Well, if you are into home automation, a shelly relay is a wifi connected smart relay, built into a very compact form factor in order to fit inside electrical junction boxes like behind wall switches or wall sockets.