mqtt

mqtt subscribe -v -h 212.83.139.102 'iotquiz/vettel/question/17'
mqtt subscribe -v -h 212.83.139.102 '#'
mqtt subscribe -v -h 212.83.139.102 'iotquiz/+/question/17'
mqtt subscribe -v -h 212.83.139.102 'iotquiz/#/17'
mqtt subscribe -v -h 212.83.139.102 '$SYS/#'