I have 2 of those sensors and I believe they work pretty well. They are Xiaomi MiFlora. I have mine linked with Home Assistant and a Bluetooth to WiFi link and I can view the data anywhere to check on temps and lighting. Normally they only give you data when in BLE range. I also wrapped the top of mine in plastic wrap to avoid moisture when watering. It is of course just another data point so pay attention to your plant also.