LOCOSYS LC20031-V2 135-Channel Dual-Band GNSS Receiver Module Category_Radio & Wireless/Bluetooth so you don't have to

so you don't have to worry about running out of IO ports when making projects

Up to 4 Relay with photo-coupled circuit

Add a USB battery pack (not included) and a WiFi dongle and you can make it roam free

Input voltage: 100-240VAC

for two devices such as smartphones or the similar things very close to each other to establish communication

LOCOSYS LC20031-V2 135-Channel Dual-Band GNSS Receiver Module Category_Radio & Wireless/Bluetooth so you don't have toThe LOCOSYS LC20031 V2 integrates a global navigation satellite system (GNSS) receiver with an embedded antenna to create a complete GNSS module that can track up to 135 signals at a time from GPS and many other satellite systems, with support for both L1 and L5 bands. It can provide updates at up to 10 Hz, has a built in rechargeable battery for rapid satellite acquisition (external power is still required for normal operation), and outputs data as