Overview
LoRa1280/1281F27 is 2.4G wireless transceiver module. This module use SX1280/SX1281
from Semtech. And we add RF amplifier to get higher output power and longer range. It is LoRa
modulation with maximum 500mW ( 27dBm ) output power. This wireless module has good
sensitivity and good ant-interference. Also Lora1280F27 can measure the range between the
transmitter and receiver.

Applications
Wireless remote
Smart home
Toy control
Tire pressure monitoring
Health monitoring
Tag reader

 Internal block diagram

Performance parameter
The following parameters are obtained by connecting the instrument with a 50 ohm
copper axis. @VCC=3.3V

The following data is tested with DEMO board and tested at 2440MHZ working
frequency.

 The output power under different frequencies and voltages are shown in the figure below: 

The corresponding crystal frequency offset at different temperatures and frequencies are shown in the
figure below:

Antenna and LAYOUT considerations

Note: The GND of the 18-pin should not be connected to the system ground as much as possible, which may affect the stability of the system and the receiving performance of the module. For external SMA, refer to the recommended circuit.

The antenna is an important part of the communication system. Its performance directly affects the parameters of the communication system. The antenna impedance required by the module is 50 ohms. The universal antenna has wires, and can also be used for SMA adapter straight/elbow/folding rods, small suction cups, etc. Users can purchase antennas according to their own application environment. In order to make the module work optimally, it is recommended to use the company. Antenna provided.

The following principles should be followed during antenna use to ensure the best
communication distance of the module:
The antenna should not be close to the ground surface, and the surrounding area should be
kept away from obstacles;
If the suction cup antenna is purchased, the lead wire should be straightened as much as
possible, and the suction cup base should be attached to the metal object;

Working Mode:
1) Normal transmission mode: Send data packets at regular intervals (in the setup mode, no
data packets are sent temporarily);

2) Normal receiving mode: power-on enters the receiving state, receives the data packet, and
re-issues the correctly received data packet;
3) Normal transmission mode: the module is in the normal state;
4) Constant acceptance mode: the module is in the normal receiving state (no data is
forwarded);
5) Sleep mode: The RF module is in the standby state.

Button Operation:
1) [SET] Button
Press the [SET] button to enter into setting mode; Or press the [SET] button to be out of the
setting mode upon the last parameter is done.
2) [UP/Down] Button
In the setting mode, press the button to modify the corresponding setting parameters.
Note: The DEMO board has FLASH memory inside, all the setting parameters will be saved
automatically and keep unchanged even power-off.