Sent an uplink message

In this use case, an uplink message will be send.

Note

The driver must be initialised Initialise the driver and must be setup to OTAA OTAA setup steps or ABP OTAA setup steps.

In this example these two variables will be send in an uplink message

uint16_t hum; // Humidity
int16_t temp; // Temperature

Uplink Message Setup

The following must be added to a FreeRTOS task in the project:

1. Define a payload struct variable

   lora_driver_payload_t uplinkPayload;

2. Populate the payload struct with data

   uplinkPayload.len = 4; // Length of the actual payload
   uplinkPayload.port_no = 1; // The LoRaWAN port no to sent the message to
    
   uplinkPayload.bytes[0] = hum >> 8;
   uplinkPayload.bytes[1] = hum & 0xFF;
   uplinkPayload.bytes[2] = temp >> 8;
   uplinkPayload.bytes[3] = temp & 0xFF;

3. Send the uplink message:

   lora_driver_returnCode_t rc;
    
   if ((rc = lora_driver_sendUploadMessage(false, &_uplinkPayload)) == LORA_MAC_TX_OK )
   {
          // The uplink message is sent and there is no downlink message received
   }
   else if (rc == LORA_MAC_RX_OK)
   {
          // The uplink message is sent and a downlink message is received
   }