Downlink - Node Red to End Device

Application Development
1

I want to send HEX to my End Device from Node Red. The Hex is from 2 to 16 bytes long.

I my function node I have

// Get AppID and DevID as saved from last uplink
const appId = msg.payload.app_id;
const devId = msg.payload.dev_id;
const bytes = ‘03’;

// Set Topic
msg.topic = ${appId}/devices/${devId}/down;

//Set Payload
msg.payload = {
dev_id: devId,
port: 2,
confirmed: false,
schedule: ‘replace’,
payload_raw: Buffer.from(bytes).toString(‘base64’),
//payload_raw: bytes
};

return msg;

I my Console I see
image

What encoder do I need?