Mqtt.js: how would I send Json ?

[helxsz]

I tried to send the json message but failed

    client.publish(  "lights/hue/device123/set/led",  {'a':5}, { retain: true },function(err){
        if(err){
            console.log('publishing message',failed);
        }
    });

I know it does't support json, but would be a better way to do it

[ralphtheninja]

client.publish('lights/hue/device123/set/led', JSON.stringify({ a: 5 }))

[helxsz]

Got it, thanks @ralphtheninja

[ralphtheninja]

You need to do the opposite in .on('message', fn), e.g.

client.on('message', function (topic, payload) {
  const obj = JSON.parse(payload.toString()) // payload is a buffer
})