Ttn-otaa sketch downlink values

[currydem23]

Hello all, I am just now using the ttn-otaa example from the TTN_esp32 library, it connects and sends data well to The Things Network. However, When I send downlink bytes from TTN, I keep getting random numbers. I send down bytes in ASCII format. I sent '31', '32', and '33'. I was expecting to get 49 from 31, 50, from 32, and 51 from 33. Instead, I got 17 from 31, and 49 for both 32 and 33. This is the unaltered template for the ttn-otaa sketch, does anyone how to change this? number I'm looking to change is the variable "payload[]".

#include <TTN_esp32.h>

#include "TTN_CayenneLPP.h"
/***************************************************************************
 *  Go to your TTN console register a device then the copy fields
 *  and replace the CHANGE_ME strings below
 ****************************************************************************/
const char* devEui = "FILLMEIN"; // TTN Device EUI but removed for this post
const char* appEui = "FILLMEIN"; // TTN Application EUI but removed for this post
const char* appKey = "FILLMEIN"; // TTN Application Key but removed for this post

TTN_esp32 ttn ;
TTN_CayenneLPP lpp;

void message(const uint8_t* payload, size_t size, int rssi)
{
    Serial.println("-- MESSAGE");
    Serial.print("Received " + String(size) + " bytes RSSI=" + String(rssi) + "db");
    for (int i = 0; i < size; i++)
    {
        Serial.print(" " + String(payload[i]));
        // Serial.write(payload[i]);
    }

    Serial.println();
}

void setup()
{
    Serial.begin(115200);
    Serial.println("Starting");
    ttn.begin();
    ttn.onMessage(message); // Declare callback function for handling downlink
                            // messages from server
    ttn.join(devEui, appEui, appKey);
    Serial.print("Joining TTN ");
    while (!ttn.isJoined())
    {
        Serial.print(".");
        delay(500);
    }
    Serial.println("\njoined !");
    ttn.showStatus();
}

void loop()
{
    static float nb = 18.2;
    nb += 0.1;
    lpp.reset();
    lpp.addTemperature(1, nb);
    if (ttn.sendBytes(lpp.getBuffer(), lpp.getSize()))
    {
        Serial.printf("Temp: %f TTN_CayenneLPP: %d %x %02X%02X\n", nb, lpp.getBuffer()[0], lpp.getBuffer()[1],
            lpp.getBuffer()[2], lpp.getBuffer()[3]);
    }
    delay(10000);
}