Shelly 1L Gen3 _MAKE_DEV_QTPY (often used with DTR) RTS

(often used with DTR) RTS Out "Ready to send" control output

You will need to solder the 14-pin female headers to the board before use

they are made of cast brass

It's possible to disable the LED (or change the PPS output behaviour) with software

Shelly 1L Gen3 _MAKE_DEV_QTPY (often used with DTR) RTSThe Shelly 1L Gen3 is a compact single channel smart relay designed for lighting control in installations without a neutral wire. It operates on 220240V AC power and requires the included Shelly Bypass 1L 2L connected in parallel to the load for proper functionality in no neutral setups. The device supports Wi Fi and Bluetooth connectivity, allowing for remote control via the Shelly app or integration with home automation systems such as Home