{"NAME":"Nedis WIFIDS10WT","GPIO":[0,107,0,108,0,0,0,0,0,0,0,0,0],"FLAG":0,"BASE":54}

Flashing

I successfully flashed this device using both Tuya Convert snd serial flashing soldering cables directly onto the TYWE3S chip. I would recommend the serial flashing method which also allows you to configure the setup without worrying about the chip going to sleep.

If configuring using the battery, 3 presses within 2 seconds energise the TYWE3S for about 50 seconds.

After initial setup type the following into the Tasmota console window:

TuyaMCU 51,51

The following makes sure the device does not get reset inadvertently or during low power conditions:

Backlog SetOption1 1; SetOption65 1

Functions

To get smoke detected alerts and battery status use rules to send data to custom topics.

Rule1
  ON TuyaReceived#CmndData=6A04000100 DO publish2 stat/%topic%/FIRE OFF ENDON
  ON TuyaReceived#CmndData=6A04000100 DO publish2 stat/%topic%/TEST OFF ENDON
  ON TuyaReceived#CmndData=6A04000100 DO publish2 stat/%topic%/BATTERY OFF ENDON
  ON TuyaReceived#CmndData=6A04000100 DO publish2 stat/%topic%/MUTE OFF ENDON
  ON TuyaReceived#CmndData=6A04000101 DO publish2 stat/%topic%/FIRE ON ENDON
  ON TuyaReceived#CmndData=6A04000101 DO publish2 stat/%topic%/MUTE OFF ENDON
  ON TuyaReceived#CmndData=6A04000102 DO publish2 stat/%topic%/FIRE ON ENDON
  ON TuyaReceived#CmndData=6A04000102 DO publish2 stat/%topic%/MUTE ON ENDON
  ON TuyaReceived#CmndData=6A04000103 DO publish2 stat/%topic%/FIRE ON ENDON
  ON TuyaReceived#CmndData=6A04000103 DO publish2 stat/%topic%/TEST ON ENDON
  ON TuyaReceived#CmndData=6A04000103 DO publish2 stat/%topic%/MUTE OFF ENDON
  ON TuyaReceived#CmndData=6A04000104 DO publish2 stat/%topic%/BATTERY ON ENDON

Enable the rule: Rule1 1

If you wish to integrate the device seamlessly in Home Assistant, type the following into the Tasmota console window (modify the names to your requirements):

Rule2
  ON system#boot do publish2 homeassistant/binary_sensor/%macaddr%_fire/config {"name":"Fire Alarm","state_topic":"stat/%topic%/FIRE","device_class":"smoke","unique_id":"%macaddr%_fire","device":{"connections":[["mac","%macaddr%"]]}} ENDON
  ON system#boot do publish2 homeassistant/binary_sensor/%macaddr%_test/config {"name":"Fire Alarm Test","state_topic":"stat/%topic%/TEST","icon":"mdi:bell-alert","unique_id":"%macaddr%_test","device":{"connections":[["mac","%macaddr%"]]}} ENDON
  ON system#boot do publish2 homeassistant/binary_sensor/%macaddr%_mute/config {"name":"Fire Alarm Mute","state_topic":"stat/%topic%/MUTE","icon":"mdi:bell-sleep","unique_id":"%macaddr%_mute","device":{"connections":[["mac","%macaddr%"]]}} ENDON
  ON system#boot do publish2 homeassistant/binary_sensor/%macaddr%_battery/config {"name":"Fire Alarm Battery","state_topic":"stat/%topic%/BATTERY","device_class":"battery","unique_id":"%macaddr%_battery","device":{"connections":[["mac","%macaddr%"]]}} ENDON

Enable the rule: Rule2 1

Enable SetOption66 1 to forward TuyaReceived messages to MQTT.

This device on Tasmota 8.2 does not report a full TuyaMCU message, but it sends 55AA000000010101 when smoke is detected.

I am powering this device using a PoE connection linked to a DC-DC step down PCB which fits nicely in place of the 2xAA batteries. I have soldered a cable between the power and the VCC of the TYWE3S which keep the Tasmote interface permanently available and allows simple resetting of the smoke detector after an activation.

Pinout

.