Ingesting String Data into mNamedSignalDataSource

[akashenji]

I have successfully created the signal catalogs and implemented all necessary features from the cloud side. However, I am currently facing an issue where I am unable to send data to mNamedSignalDataSource as a STRING data type.

Throughout the application, the following code is used to ingest data:

std::vector<std::pair<std::string, DecodedSignalValue>> values;
values.emplace_back(
    std::make_pair(mLatitudeSignalName, DecodedSignalValue(lastValidLatitude, SignalType::DOUBLE)));
values.emplace_back(
    std::make_pair(mLongitudeSignalName, DecodedSignalValue(lastValidLongitude, SignalType::DOUBLE)));

mNamedSignalDataSource->ingestMultipleSignalValues(0, values);

However, the DecodedSignalValue function does not currently support the STRING data type:

struct DecodedSignalValue {
    DecodedSignalValueType signalValue;
    SignalType signalType;

    template <typename T>
    DecodedSignalValue(T val, SignalType type)
        : signalType(type) {
        switch (signalType) {
            case SignalType::UINT64:
                signalValue.uint64Val = static_cast<uint64_t>(val);
                break;
            case SignalType::INT64:
                signalValue.int64Val = static_cast<int64_t>(val);
                break;
            default:
                signalValue.doubleVal = static_cast<double>(val);
        }
    }
};

Is there a function available in the AWS Edge app that supports ingesting string data? If possible, could you provide a sample implementation for sending string data to mNamedSignalDataSource?

[gqmelo]

You can take a look the Network Agnostic Data Collection (NADC) examples, which shows a few use cases: https://github.com/aws/aws-iot-fleetwise-edge/tree/v1.2.1/examples#examples-list including one what ingest a signal as string: https://github.com/aws/aws-iot-fleetwise-edge/blob/v1.2.1/examples/network_agnostic_data_collection/MyCounterDataSource.cpp#L52