This is the part list for this project. Make sure you use the same components. Check all connections and then uplaod the code and test it.
For transmitter We need:
1 x Arduino NANO/UNO/pro mini: LINK eBay
1 x TP4056 charger: LINK eBay
1 x 3.7V LiPo (200mAh+): LINK eBay
1 x Nextion TFT display: LINK eBay
1 x GPS module (gy-GPS6MV2): LINK eBay
1 x Sliding switch: LINK eBay
3D case STL files: DOWNLOAD HERE
wire, solder, soldering-iron, 3D case, etc