Firmware upgrade address: https://github.com/xsp1989/ZB-GW03_firmware/tree/master/tasmota Set the serial port to transparent transmission (Zigbee2MQTT) Official website documentation: https://tasmota.github.io/docs/Serial-to--Bridge/#additional-resources FAQ 1: The device indicator light is not on - If the wrong device template is modified. As a result, the device light does not light up. You can directly press and hold the button for more than 50 seconds to reset the gateway. FAQ 2: Reset tasmota gateway - 1. Completely disconnect power from the device for . 2. Turn the device on and off 6 times at intervals of less than 10 seconds and keep it on after the 7th time. 3. Official documentation: https://tasmota.github.io/docs/Device-Recovery/#fast-power-cycle-device-recovery Notice:This is the "Tasmota MQTT" gateway. Tuya/Smart Life APP, APP and other APPs are not supported. Name:TASMOTA MQTT Hub Input:5V/1A Wi-Fi:IEEE 802.11b/g 2.4Ghz Zigbee:IEEE 802.15.4 Ethernet:10/100M ZigBee module:EFR32MG21 Colour:As Shown Material:ABS Size:76x76x22mm Package Contents: 1 * Zigbee 3.0 gateway 1 * Network cable 1 * Power cord Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.