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Table of Contents 1 Interface description 2 Address operation addr_getshort(string addr[, number type, number hlword]) addr_setshort(string addr, number num[, number type, number hlword]) addr_getword(string addr[, number type, number hlword]) addr_setword(string addr, number num[, number type, number hlword]) addr_getint(string addr[, number type, number hlword]) addr_setint(string addr, number num[, number type, number hlword]) addr_getdword(string addr[, number type, number hlword]) addr_setdword(string addr, number num[, number type, number hlword]) addr_getbit(string addr[, number type]) addr_setbit(string addr, number num[, number type]) addr_getfloat(string addr[, number type, number hlword]) addr_setfloat(string addr, number num[, number type, number hlword]) addr_getdouble(string addr[, number type, number hlword]) addr_setdouble(string addr, number num[, number type, number hlword]) addr_getstring(string addr, number length[, number type, number hlbyte]) addr_setstring(string addr, string str[, number type, number hlbyte]) addr_bmov(string dst, string src, number length) addr_fill(string addr, number num, number length) addr_newnoaddr(string addr, number offset) addr_newstataddr(string addr, number offset) addr_gethex64(string addr[, number type, number hlword]) addr_sethex64(string addr, number num[, number type, number hlword]) 3 Serial port operation 4 MQTT operation mqtt.create(string serverurl, string clientid[, int useDomain]) mqtt.close(mqtt obj) mqtt:connect(table conn[, table lwt, table cart]) mqtt:disconnect([number timeout]) mqtt:isconnected() mqtt:subscribe(string topic, number qos) mqtt:unsubscribe(string topic) mqtt:publish(string topic, string message, number qos, number retain[, number timeout]) mqtt:close() mqtt:on(string method, function callback) mqtt:setup_cfg() 5 JSON operation 6 Cloud mode 7 HTTP operation 8 General Functions 9 Special function for V-NET 10 Message summary algorithm 11 MySQL database operation