This example shows the receiving and sending of LoRa P2P data .
The example is developed on the basis of standard firmware, and the added code is in the comment range of /* User Code */, /* End User Code */.
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After power on, the module will be automatically configured into P2P mode.
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By default, the module P2P mode is receiving and can receive data.
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After receiving the command "at+send=lorap2p:xx", the module will automatically switch to send mode and send data out.After the data is sent, the module returns to the received state.
The following parameters can be modified as you wish.
1. Frequency
Sets the channel frequency.
Range: 150000000HZ - 960000000HZ （150MHz - 960MHz）
Example：uint32_t Frequency = 868100000
2. Spreading Factor
Sets the spreading factor.
Range: 7 - 12
Example：uint8_t Spreadfact = 7
3. Bandwidth
Sets the bandwidth.
Frequencies: 0: 125 kHz, 1: 250 kHz, 2: 500 kHz
Example：uint8_t Bandwidth = 0
4. Coding Rate
Sets the coding rate.
Options: 1: 4/5, 2: 4/6, 3: 4/7, 4: 4/8
Example：uint8_t Codingrate = 1
5. Preamble Length
Sets the preamble length.
Range: 5 - 65535
Example：uint16_t Preamlen = 8
6. TX (Transmission) Power
Sets the TX (Transmission Power).
Range: 0 - 20 dBm
Example：uint8_t Powerdbm = 20