dragino / lht65n

Dragino LHT65N

The LHT65N is widely used for environmental monitoring. Payload layout varies by firmware; treat the bundled decoder as a starting point and verify against live uplinks.

Tips

• Compare raw hex with the Dragino decoding sheet for your firmware revision.
• If values look wrong, check endianness and whether the probe is wired for external mode.

Decoder

Copy into ChirpStack or paste in the playground.

// Dragino LHT65N — temp / humidity sensor (example decoder; confirm with your FW)

function decodeUplink(input) {
  try {
    const bytes = input.bytes;
    const decoded = {};
    if (bytes.length >= 7) {
      decoded.battery_v = (((bytes[0] << 8) | bytes[1]) & 0x3fff) / 1000;
      const humRaw = ((bytes[2] << 8) | bytes[3]) / 10;
      decoded.relative_humidity = Math.round(humRaw * 10) / 10;
      const tempRaw = ((bytes[4] << 8) | bytes[5]) / 100;
      decoded.temperature = Math.round(tempRaw * 100) / 100;
      decoded.sn = `${bytes[4].toString(16)}`; // simplistic; FW-dependent
      decoded.sensor_type = bytes[6];
    } else if (bytes.length >= 5) {
      decoded.external_di = bytes[0];
      decoded.battery_mv = (((bytes[1] << 8) | bytes[2]) & 0x3fff) * 10;
      const t = ((bytes[3] << 8) | bytes[4]) / 100;
      decoded.temperature = t;
    }
    return { data: decoded };
  } catch (err) {
    return { errors: [`Decoder error: ${err.message}`] };
  }
}