BN180 GPS Module can show your speed. When you use it for Raspberry Pi, there is no driver needed. Here is connection with RPi, red to 3.3v, black to gnd, green to txd, white to rxd | When you power up bn 180 GPS module the first time in a new location, it always takes longer to find satillites. This is referred to as “cold start”. Once you’ve done it the first time, later when you restart bn180 GPS module, it will get a lock much faster. | Data Level : TTL or RS-232,Default TTL level. To make it be RS232 output, you need to use one TTL to RS232 converter cable | BN 180 gps doesn't have flash and compass. If you need it, please buy bn-880 gps module, https://www.amazon.com/nextion | If you have any problem, please contact seller as follow: click "DIYmalls"(you can find "Sold by DIYmalls" under Buy Now button), in the new page, click "Ask a question".

bn 880 gps module is dual module compass, with and electronic compass IC HMC5883L | bn880 gps module is suitable for Open source flight controller, not for flight control with SCM. When you use it for Raspberry Pi, there is no driver needed but you need to install software | bn 880 gps module has flash to save configuration. So you do not need to reset data when you use it next time. | You can buy more bn180 bn220 gps here, https://www.amazon.com/nextion | If you have any problem, please contact seller as follow: click "DIYmalls"(you can find "Sold by DIYmalls" under Buy Now button), in the new page, click "Ask a question".