https://registry.npmjs.org/mqtt/-/mqtt-4.3.7.tgz;downloadfilename=npm2/mqtt-4.3.7.tgz;sha512sum=7b0deac06fd3251a2b4f3e3b796e3abd9e68070e4c1186d06556848e2e388f9940512412a88128ba5ecab9afc16ad056d07d24290702f64c141dad6acda5874b