Need help to program uplink payload if possible?

Projects Programming
1

I need help with programming uplink payloads for my ESP32, which is connected to a network server to track the time transmission interval and data payload. Essentially, I want to monitor the downtime between the communication of my ESP32 and the server.

Using a LoRaWAN example file, I have successfully connected to my network server via OTAA to send uplink messages. Now, I want to utilize LoRa to send data from my devices to the network server. The device in question is a JSN-SR04T ultrasonic sensor. I have written code to read the sensor's values on arduino ide, and my ESP32 can send its own data to the network server.

Is there a way to send the sensor's readings to the network server using LoRa?
Is this feasible?

2

Yes.

3

how do I create a uplink data payload if I have the value of something like distance = 20 cm?

4

Post your code and what does not work. And what hardware you try to use for LoRa ...

5

its not that it does not work. more of like my esp32 is alr connected to the gateway via lora and sending data to my network server(chirpstack).

I am not sure how to change or edit the value of the data payload. Right now it is sending a payload oif 41424344 which has no value and meaning.

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6

For the Hardware part I am using
microcontroller board-> HELTEC LORA 32 V3.1
sensors-> JSN-SR04T(ultrasonic sensor)

For the Software part I need help to be able to get the data(i.e. distance detected 20cm)
encode and to be sent to the network server.


static void prepareTxFrame(uint8_t port) {
    appDataSize = 4; // AppDataSize max value is 64
    appData[0] = 'A';
    appData[1] = 'B';
    appData[2] = 'C';
    appData[3] = 'D';
}
7

You define 4 byte payload and you see it on the servers GUI as 0x41 0x42 0x43 0x44:

static void prepareTxFrame ...

Change that to max. 64 bytes and fill as you please.

9

I got it thank you very much