The Bitcoin metrics tracker was designed to sit near your desktop and keep an eye on several key important metrics on the Bitcoin network. These metrics include the Bitcoin price, the total Bitcoin marketcap, the total Bitcoin supply, the hash rate of the network, the current number of Bitcoins rewarded per block, the estimated time interval between blocks mined, the number of blocks mined so far and the remaining blocks left to mine in the current 4 year cycle. It uses Wi-Fi to connect to Blockchain.com to update the metrics at regular intervals. There is no need to hard code Wi-Fi credentials as there is a WPS setup for synchronisation with your router. Router credentials are then saved to flash memory via NVS so that you only have to do it one time. The green light on the screen indicates if Wi-Fi is connected. The green light will switch off if disconnected with the router. It will try to reconnect when it disconnects. The spinner around the green light is when the data is updating