The example in this section demonstrate sending simple LoRaWAN packets in Activation by Personalization (ABP) activation. The lorawan_abp_example send a "hello world" packet every TX_INTERVAL seconds to the Gateway.
To be able to send message to LoRaWAN Network Server (e.g. The Things Network) in ABP activation, the device need 3 informations including Device address (dev_addr), Network Session Key (NwkSKey), Application Session Key (AppSKey). Those 3 information can be retrived when doing registration on your LoRaWAN Network Server. Replace dev_addr , nwkS_key & appS_key in the example source code with received information. Make sure that they are all in MSB format.
If you are working with The Things Network, refer to this Adding Devices instruction.
static uint8_t nwkS_key[] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
static uint8_t appS_key[] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
static uint8_t dev_addr[] = {0x00, 0x00, 0x00, 0x00};
The parameters of LoRaWAN can be modify via following functions:
sx126x.set_tx_port(1);
sx126x.set_rx1_delay(1000);
The parameters of LoRa PHY can be modify via following functions:
sx126x.set_tx_power(14);
sx126x.set_frequency(868100000);
sx126x.set_spreading_factor(RFT_LORA_SPREADING_FACTOR_7);
sx126x.set_bandwidth(RFT_LORA_BANDWIDTH_125KHZ);
sx126x.set_coding_rate(RFT_LORA_CODING_RATE_4_5);
sx126x.set_syncword(RFT_LORA_SYNCWORD_PUBLIC);
Set LoRaWAN Transmit fPort void set_tx_port(uint8_t tx_port);
Parameter
Value
Description
tx_port
1..223 (0x01..0xDF)
Application-specific port (Recommended)
tx_port
224
LoRaWAN Mac layer test protocol
(LoRaWAN 1.0.3 Specification
Set LoRaWAN Downlink Windows 1 Delay void set_rx1_delay(uint32_t rx1_delay);
Parameter
Description
rx1_delay
Delay time for first downlink windows in second(s)
(RP2-1.0.3 LoRaWAN Regional Parameters
void set_tx_power(int8_t tx_power);
Parameter
Value
Description
tx_power
-9 (0xF7 ) to +22 (0x16 )The TX output power in dBm with the step of 1 dBm
Set LoRa Transmit Frequency void set_frequency(uint32_t frequency);
Parameter
Description
frequency
The TX frequency in Hz
Set LoRa Transmit Spreading Factor void set_spreading_factor(rft_lora_spreading_factor_t spreading_factor);
Parameter
Value
Description
spreading_factor
RFT_LORA_SPREADING_FACTOR_5 Spreading Factor 5
spreading_factor
RFT_LORA_SPREADING_FACTOR_6 Spreading Factor 6
spreading_factor
RFT_LORA_SPREADING_FACTOR_7 Spreading Factor 7
spreading_factor
RFT_LORA_SPREADING_FACTOR_8 Spreading Factor 8
spreading_factor
RFT_LORA_SPREADING_FACTOR_9 Spreading Factor 9
spreading_factor
RFT_LORA_SPREADING_FACTOR_10 Spreading Factor 10
spreading_factor
RFT_LORA_SPREADING_FACTOR_11 Spreading Factor 11
spreading_factor
RFT_LORA_SPREADING_FACTOR_12 Spreading Factor 12
Set LoRa Transmit Bandwidth void set_bandwidth(rft_lora_bandwidth_t bandwidth);
Parameter
Value
Description
bandwidth
RFT_LORA_BANDWIDTH_10KHZ Bandwidth 10.42 kHz
bandwidth
RFT_LORA_BANDWIDTH_15KHZ Bandwidth 15.63 kHz
bandwidth
RFT_LORA_BANDWIDTH_20KHZ Bandwidth 20.83 kHz
bandwidth
RFT_LORA_BANDWIDTH_31KHZ Bandwidth 31.25 kHz
bandwidth
RFT_LORA_BANDWIDTH_41KHZ Bandwidth 41.67 kHz
bandwidth
RFT_LORA_BANDWIDTH_62KHZ Bandwidth 62.50 kHz
bandwidth
RFT_LORA_BANDWIDTH_125KHZ Bandwidth 125 kHz
bandwidth
RFT_LORA_BANDWIDTH_250KHZ Bandwidth 250 kHz
bandwidth
RFT_LORA_BANDWIDTH_500KHZ Bandwidth 500 kHz
Set LoRa Transmit Coding Rate void set_coding_rate(rft_lora_coding_rate_t coding_rate);
Parameter
Value
Description
coding_rate
RFT_LORA_CODING_RATE_4_5 Coding Rate 4/5
coding_rate
RFT_LORA_CODING_RATE_4_6 Coding Rate 4/5
coding_rate
RFT_LORA_CODING_RATE_4_7 Coding Rate 4/5
coding_rate
RFT_LORA_CODING_RATE_4_8 Coding Rate 4/5
Set LoRa Transmit Syncword void set_syncword(rft_lora_syncword_t syncword);
Parameter
Value
Description
syncword
RFT_LORA_SYNCWORD_PRIVATE Private Network Syncword (0x1424)
syncword
RFT_LORA_SYNCWORD_PUBLIC Public Network Syncword (0x3444)
Maintained by Prof. F. Ferrero & mtnguyen