High power 1W, long distance transmission, frequency range 902-928mhz, Microhard P900 core module manufacturer's nominal distance is 60 kilometers.
RS232 has one more U3 chip SP3232EE than TTL, a small amount of 2 resistors with 220 ohms, and more capacitors with C13, C16 and C18. RS232 version needs to be booked
This is the third generation TTL/RS232 small board after upgrading, which enhances the circuit protection. The floor size is shown below, and the positioning hole is M3.
The wiring mode of 5PIN is compatible with the old 4PIN wiring, and the spacing of 2.54 is more convenient for installation and debugging. The following picture connects to the computer for debugging: the power range is 7-18V, and supports 2S,3S and 4S batteries
The power supply range is 7-18V, which can be connected to 2S,3S and 4S batteries.
For surface-to-air applications, it is recommended to use boxed digital radio stations on the ground and small boards in the air.