Help Needed with Multiple Devices in Blynk

Need Help With My Project
1

Hi Blynk Community,

I’m new to Blynk and ran into a problem. I’m using multiple Argon Particle boards with the Blynk app.

What I’ve Tried:
I’ve added the Auth tokens of each device in an array, along with their respective device IDs in another array, as shown below. The issue is that when I add a new device, I have to update both arrays, which can be cumbersome when flashing code.

Relevant Code Snippet:

#define BLYNK_TEMPLATE_ID           "TMPxxxxxx"
#define BLYNK_TEMPLATE_NAME         "Device"

const char* authTokens[] = {
    "yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy",  
    "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx",
    // "TOKEN_3"
};

const char* deviceIDs[] = {
    "aaaaaaaaaaaaaaaaaaaaaaaa",   // device 1
    "bbbbbbbbbbbbbbbbbbbbbbbb",   // device 2
    // "DEVICE_ID_3"
};

int authTokenIndex = -1;
String myID = System.deviceID();

void blynkBegin() {
    for (int i = 0; i < sizeof(deviceIDs) / sizeof(deviceIDs[0]); i++) {
        if (myID == deviceIDs[i]) {
            authTokenIndex = i;
            break;
        }
    }

    if (authTokenIndex >= 0) {
        Blynk.begin(authTokens[authTokenIndex]);
    } else {
        Particle.publish("Error", "Device ID not found");
    }
}

void setup() {
    Serial.begin(115200);
    blynkBegin();
    // setup
}

void loop() {
    Blynk.run();
    // loop
}

Any advice would be greatly appreciated! Thanks!

2

Could you please explain the end goal?

Why do you need to keep all the tokens on the device?

3

I’m having 10 devices with different tokens but same template and all devices working simultaneously. The snippet I sent is frugally designed for temporary purpose.

The end goal is to upload same firmware file in all devices. for now if I didn’t keep all tokens in the code I’ll have to generate separate binary file to flash. This logic is irrelevant if the number of device increase in future.

P.S. : I have already implemented token matching logic i.e. the different devices would take their respective tokens.