Milfra Smart Module Relay
Model reference: TB41
Milfra Smart Module

Available from:


Flashed with:
Serial port

GPIO #Component
GPIO00 LedLinki
GPIO01 None
GPIO02 None
GPIO03 Relay2
GPIO04 None
GPIO05 None
GPIO09 None
GPIO10 None
GPIO12 None
GPIO13 Switch2n
GPIO14 Buzzer
GPIO15 Relay1
GPIO16 Switch1n
ADC0 None
Template for Tasmota v9.1+
{"NAME":"Milfra Smart Module TB41","GPIO":[576,0,0,225,0,0,0,0,0,193,480,224,192,0],"FLAG":0,"BASE":18}

Since Relay 2 is on UART0 RXD, serial connection to this device isn’t possible.

The Buzzer is configured as BUZZER, but needs a PWM signal to actually buzz - you can configure it as PWM instead.

There are two PCBs inside, one with mostly high voltage stuff and one on top to control it. The logic PCB has solder points for 2mm grid pin headers which are labeled on the backside of the PCB, beware, it’s glued to the case on the connector end of the case.