Great module for smart home makers! For a promo price of 7$ you can't even get discrete modules. With this module you have the advantage of a clean single board design and several power options including mains power. The pin headers and jumpers are provided but have to be soldered by your own. This device is documented exceptionally good. Refer to the links at the beginning of the item description. If you don't want tp program an application just flash the current tasmota.bin (in my case it was 9.2.0). Configure the 'Module type' as Generic (0) and set the Relay GPOI pins via the Web UI, and you are done. For programmig pin IO0 has to be tied to GND while powering on (same as for Sonoff devices). You will need an external serial adapter for programming. I am very satisfied with this module and will order more.

Great module for smart home makers! For a promo price of 7$ you can't even get discrete modules. With this module you have the advantage of a clean single board design and several power options including mains power. The pin headers and jumpers are provided but have to be soldered by your own. This device is documented exceptionally good. Refer to the links at the beginning of the item description. If you don't want tp program an application just flash the current tasmota.bin (in my case it was 9.2.0). Configure the 'Module type' as Generic (0) and set the Relay GPOI pins via the Web UI, and you are done. For programmig pin IO0 has to be tied to GND while powering on (same as for Sonoff devices). You will need an external serial adapter for programming. I am very satisfied with this module and will order more.

Great module for smart home makers! For a promo price of 7$ you can't even get discrete modules. With this module you have the advantage of a clean single board design and several power options including mains power. The pin headers and jumpers are provided but have to be soldered by your own. This device is documented exceptionally good. Refer to the links at the beginning of the item description. If you don't want tp program an application just flash the current tasmota.bin (in my case it was 9.2.0). Configure the 'Module type' as Generic (0) and set the Relay GPOI pins via the Web UI, and you are done. For programmig pin IO0 has to be tied to GND while powering on (same as for Sonoff devices). You will need an external serial adapter for programming. I am very satisfied with this module and will order more.

It works but there is a big issue in design. GPIO16 is connected to the first relay. GPIO16 is high on booting ESP8266; so the relay closes und opens every restart. I soldered a wire from GPIO4 to the Relay.

It works but there is a big issue in design. GPIO16 is connected to the first relay. GPIO16 is high on booting ESP8266; so the relay closes und opens every restart. I soldered a wire from GPIO4 to the Relay.

It works but there is a big issue in design. GPIO16 is connected to the first relay. GPIO16 is high on booting ESP8266; so the relay closes und opens every restart. I soldered a wire from GPIO4 to the Relay.