Espruino and Amazon Alexa integration (implementation completed)

Well it seems to me you are trying to parse a XML response with JSON.parse. You will need a XML parser to get what you want.

If you are just interested in the BinaryState Tag value you can get by with a regex if they are supported.

// Gives you the value of BinaryState
let binaryState = /<BinaryState>(\d)<\/BinaryState>/.exec(pdata)[1];