Working with Bytes &float(MKRwan 1300)

End Devices (Nodes)
17

This is derived from working code:

uint8_t payload[30];    // Allow for up to 30 byte payload, increase/decrease as appropriate
uint8_t payloadSize; 

// Take & process readings
float degC = readTemperatureTo2DP();
uint16_t tempToSend = (uint16_t) ((degC +100) * 100);

// Add bytes to payload
payload[0] = highByte(tempToSend);
payload[1] = lowByte(tempToSend);
payloadSize = 2;

// Transfer to modem
modem.beginPacket();
for (uint8_t c = 0; c < payloadSize; c++) {
  modem.write(payload[c]);
}
err = modem.endPacket(confirmed);


Passing one byte at a time could possibly be refined but the MKRWAN library using Templates and other sophistications isn’t something I want to mess with. It works, but it’s not the best DIY device around as it’s a bit pricey and hard to get below 40uA when asleep.