Decoding a float value in a payload function

Application Development
18

Hi,

Can someone send me a code for HX711 loadcell amplifier and DHT22 library?

I have tried this:

uint16_t weight = scale.get_units() * 100; 

// Read sensor values and multiply by 100 to effictively have 2 decimals
uint16_t humidity = dht.readHumidity(false) * 100;

// false: Celsius (default)
// true: Farenheit
uint16_t temperature = dht.readTemperature(false) * 100;


// Split both words (16 bits) into 6 bytes of 8
byte message[6];

message[0] = highByte(temperature);
message[1] = lowByte(temperature);
message[2] = highByte(humidity);
message[3] = lowByte(humidity);
message[4] = highByte(weight);
message[5] = lowByte(weight);

LMIC_setTxData2(1, message, sizeof(message), 0);
}

On TTN side this is the payload function:

function (bytes) {

var decodedValue1 = (bytes[4] << 8) | bytes[5];
var decodedValue2 = (bytes[2] << 8) | bytes[3];
var decodedValue3 = (bytes[0] << 8) | bytes[1];

return { Weight: decodedValue1/100, Temp: decodedValue2/100, Hum: decodedValue3/100};
}

The result is this. It should be 4 decimal each:

Hum 20.3
Temp 1
Weight 654.36