Whenever I send more than 11 bytes in the payload, the payload is dropped entirely from the LoRaWAN message according to my gateway (Dragino DLOS8)
I think I’m running into the 11-byte max payload for DR0, but this shouldn’t be an issue for the US915 band I’m using. Is there a setting I can specify to up the payload amount? What follows is my current sketch, followed by the gateway output.
#define ABP_PERIOD (5000)
/*************************************
LoRaWAN band setting:
RAK_REGION_EU433
RAK_REGION_CN470
RAK_REGION_RU864
RAK_REGION_IN865
RAK_REGION_EU868
RAK_REGION_US915
RAK_REGION_AU915
RAK_REGION_KR920
RAK_REGION_AS923
*************************************/
#define ABP_BAND (RAK_REGION_US915)
#define ABP_DEVADDR {0x05, 0x05, 0x06, 0x06}
#define ABP_APPSKEY {0xB4, 0x91, 0xCC, 0x10, 0x17, 0x0E, 0x89, 0x04, 0x33, 0xCA, 0x5B, 0x13, 0x1E, 0x74, 0x20, 0x07}
#define ABP_NWKSKEY {0xBF, 0x9B, 0x75, 0xBC, 0xD6, 0x08, 0x06, 0xDD, 0x80, 0xED, 0xB8, 0xE6, 0x83, 0x29, 0x9D, 0x22}
/** Packet buffer for sending */
uint8_t collected_data[64] = { 0 };
void recvCallback(SERVICE_LORA_RECEIVE_T * data)
{
if (data->BufferSize > 0) {
Serial.println("Something received!");
for (int i = 0; i < data->BufferSize; i++) {
Serial.printf("%x", data->Buffer[i]);
}
Serial.print("\r\n");
}
}
void sendCallback(int32_t status)
{
if (status == 0) {
Serial.println("Successfully sent LoRaWAN packet");
} else {
Serial.println("Sending LoRaWAN packet failed");
}
}
void setup()
{
Serial.begin(115200, RAK_AT_MODE);
Serial.println("RAKwireless LoRaWan ABP Example");
Serial.println("------------------------------------------------------");
// ABP Device Address MSB first
uint8_t node_dev_addr[4] = ABP_DEVADDR;
// ABP Application Session Key
uint8_t node_app_skey[16] = ABP_APPSKEY;
// ABP Network Session Key
uint8_t node_nwk_skey[16] = ABP_NWKSKEY;
uint16_t maskBuff = 0x0010;
api.lorawan.mask.set(&maskBuff);
if (!api.lorawan.daddr.set(node_dev_addr, 4)) {
Serial.printf("LoRaWan ABP - set device addr is incorrect! \r\n");
return;
}
if (!api.lorawan.appskey.set(node_app_skey, 16)) {
Serial.printf
("LoRaWan ABP - set application session key is incorrect! \r\n");
return;
}
if (!api.lorawan.nwkskey.set(node_nwk_skey, 16)) {
Serial.printf
("LoRaWan ABP - set network session key is incorrect! \r\n");
return;
}
if (!api.lorawan.band.set(ABP_BAND)) {
Serial.printf("LoRaWan ABP - set band is incorrect! \r\n");
return;
}
if (!api.lorawan.deviceClass.set(RAK_LORA_CLASS_A)) {
Serial.printf("LoRaWan ABP - set device class is incorrect! \r\n");
return;
}
if (!api.lorawan.njm.set(RAK_LORA_ABP)) // Set the network join mode to ABP
{
Serial.printf
("LoRaWan ABP - set network join mode is incorrect! \r\n");
return;
}
if (!api.lorawan.adr.set(false)) {
Serial.printf
("LoRaWan ABP - set adaptive data rate is incorrect! \r\n");
return;
}
if (!api.lorawan.rety.set(1)) {
Serial.printf("LoRaWan ABP - set retry times is incorrect! \r\n");
return;
}
if (!api.lorawan.cfm.set(0)) {
Serial.printf("LoRaWan ABP - set confirm mode is incorrect! \r\n");
return;
}
/** Check LoRaWan Status*/
Serial.printf("Duty cycle is %s\r\n", api.lorawan.dcs.get() ? "ON" : "OFF"); // Check Duty Cycle status
Serial.printf("Packet is %s\r\n", api.lorawan.cfm.get() ? "CONFIRMED" : "UNCONFIRMED"); // Check Confirm status
uint8_t assigned_dev_addr[4] = { 0 };
api.lorawan.daddr.get(assigned_dev_addr, 4);
Serial.printf("Device Address is %02X%02X%02X%02X\r\n", assigned_dev_addr[0], assigned_dev_addr[1], assigned_dev_addr[2], assigned_dev_addr[3]); // Check Device Address
Serial.printf("Uplink period is %ums\r\n", ABP_PERIOD);
Serial.println("");
api.lorawan.registerRecvCallback(recvCallback);
api.lorawan.registerSendCallback(sendCallback);
}
void uplink_routine()
{
/** Payload of Uplink */
uint8_t data_len = 0;
collected_data[data_len++] = (uint8_t) 't';
collected_data[data_len++] = (uint8_t) 'e';
collected_data[data_len++] = (uint8_t) 's';
collected_data[data_len++] = (uint8_t) 't';
collected_data[data_len++] = (uint8_t) 't';
collected_data[data_len++] = (uint8_t) 'e';
collected_data[data_len++] = (uint8_t) 's';
collected_data[data_len++] = (uint8_t) 't';
collected_data[data_len++] = (uint8_t) 't';
collected_data[data_len++] = (uint8_t) 'e';
collected_data[data_len++] = (uint8_t) 's';
collected_data[data_len++] = (uint8_t) 't';
Serial.println("Data Packet:");
for (int i = 0; i < data_len; i++) {
Serial.printf("0x%02X ", collected_data[i]);
}
Serial.println("");
/** Send the data package */
if (api.lorawan.send(11, (uint8_t *) & collected_data, 2, true, 1)) {
Serial.println("Sending is requested");
} else {
Serial.println("Sending failed");
}
}
void loop()
{
static uint64_t last = 0;
static uint64_t elapsed;
if ((elapsed = millis() - last) > ABP_PERIOD) {
uplink_routine();
last = millis();
}
//Serial.printf("Try sleep %ums..", ABP_PERIOD);
api.system.sleep.all(ABP_PERIOD);
//Serial.println("Wakeup..");
}
Tue Jul 12 18:38:52 2022 daemon.info lora_pkt_fwd[20865]: RXTX~ {"rxpk":[{"tmst":4257652924,"time":"2022-07-12T18:39:45.750205Z","tmms":1341686403750,"chan":0,"rfch":0,"freq":908.700000,"stat":1,"modu":"LORA","datr":"SF10BW125","codr":"4/5","lsnr":11.8,"rssi":-40,"size":24,"data":"gAYGBQWAEgACLgYiok+xEgWUT0d6gDmz"}]}
The error can be recreated by changing this line from 11 to 12 or greater:
if (api.lorawan.send(11, (uint8_t *) & collected_data, 2, true, 1)) {
which results in the following being received at the gateway:
Tue Jul 12 18:39:43 2022 daemon.info lora_pkt_fwd[20865]: RXTX~ {"rxpk":[{"tmst":13150068,"time":"2022-07-12T18:40:27.214609Z","tmms":1341686444214,"chan":7,"rfch":1,"freq":910.100000,"stat":1,"modu":"LORA","datr":"SF10BW125","codr":"4/5","lsnr":10.8,"rssi":-41,"size":12,"data":"QAYGBQWAAgDWw8KY"}]}
As always, any help would be appreciated. Thank you!