Grove - 4-Digit Display $7.25 4 digit displays are usually a 12 pin module. In this Grove gadget, we used a TM1637 to scale down the controlling pins into 2 Grove pins. Wireless USB Adapter $16.50 USB WiFi (802.11b/g/n) Module: For Raspberry Pi and more. Grove - Screw Terminal $3.50 Grove - Screw Terminal with […]