I bought Xiaomi MIJIA MJXFJ-300-G1, https://www.xiaomitoday.com/xiaomi-mijia-air-purifier-mjxfj-300-g1-intelligent-household-filter-at-1040/
I tried to use the code from
but I still could not connect this air fresher to the Home assistant. Who can do the integration for this device? How much will such work cost? I will be grateful.