Shelly 1 GPIO Plug
thingiverse
This thing is a plug for use with the [Shelly 1 Smart Switch](https://shelly.cloud/products/shelly-1-smart-home-automation-relay/) allowing access to the expansion header. You add * 5 x Header Pins (14 mm best. 11 mm OK) * 1 x PCB board (5 holes x 2 rows) # WARNING # ⚠️ Be aware that the **GND** header pin is connected directly to the **L(-)** screw terminal. This mean that if powering the Shelly-1 with AC voltage, then the GND header pin (and any connected sensor) is at AC-Live voltage.☠️☠️ So **NEVER** use this connector when the Shelly1 is AC Powered. DC Power is OK. ⚠️
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