write data1
write data2
write data3

... after some delay

response for data1
response for data2
response for data3

async function sendData(data) {
    await streamObj.data()
}

console.log('reponse1', await sendData('data1'));
console.log('reponse2', await sendData('data2'));
console.log('reponse3', await sendData('data3'));

console.log(await Promise.all(sendData('data1'), sendData('data2'), sendData('data3')));
// should logs: [ 'response1', 'response2', 'response3' ]