This is a peer-to-peerWiFicommunicationapplication,since two XIAOs detect each othervia Wifi, the garage door open or keep opening, and vice . Improvement:It is nice to add anultrasonic distance sensor to measure the car-to-door distance and an OLED screen to check the status of the garage. If you want an onboardvoice sensor to the door to open with vocal instruction, Thanks to the tiny size of the XIAO series, it is suitable to make the wearable devices, such as a small pet tracker. Thiswearabledevice can be used as a simple GPS-Tracker which willlock its currentlocation andpublishother datavia LoRa. Improvement:A compass that shows direction and distance is a great added value to the tracker that you could consider. Meanwhile, publishing altitude, speed, or other parameters could bring more scenarios to this tracker. Besides,the chip ESP32-C3 allowsthis tracker to communicate over WiFi or BLE, and therefore, upload the tracker's data or realizethe Long Range-to-MQTT bridge as well. Application Internet of Things Wearable devices Health monitoring Education Low-Power(LP) networking Rapid prototyping Colour:Black Material:plastic Package Contents: 5 x Development Board 5 x Antenna 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.