3A Smart Home Switch
Model reference: HGZB-043
3A Smart Home

Available from:


GPIO #Component
GPIO00 Led1
GPIO01 None
GPIO02 Led4
GPIO03 Button2
GPIO04 Relay2
GPIO05 Button3
GPIO09 None
GPIO10 None
GPIO12 Button1
GPIO13 Relay1
GPIO14 Led3
GPIO15 Relay3
GPIO16 Led2
{"NAME":"3A Smart Home ","GPIO":[52,0,55,18,22,19,0,0,17,21,54,23,53],"FLAG":0,"BASE":18}

The RXD0 pin is used as one of the touch inputs, so you can’t use the serial port for flashing (unless you cut a track). However tuya-convert works fine to flash it. After Tasmota is installed, a relay will click once per second as this in the default location for the status LED. You just need to connect quickly to the AP, and browse to, and configure it as a generic module to stop the clicking. You can then go through the normal process, and restore this template.

Some numbers I found internally (taking off the cover) are 120K3S_WIFI_SV5 (for searching). I have uploaded a bunch of images here: https://github.com/sillyfrog/contact/issues/3

Finally, as there are a number of LED’s, this may need to be tweaked with the next release of Tasmota with LedLink feature.