iot access control system with mqtt

{"cid":"91222448","title":"WiFi Smart Gate Control Solution 2-Relay IoT Controller 12-24V DC WiFi\/BLE MQTT OTA Remote Unlock Real-Time HD Monitoring for Community & Industrial Access Control","imgUrl":"https:\/\/img.chinax.com\/nimg\/57\/7a\/a3ef9a255f2ec34a31fc4b5fb926-200x200-1.jpg","attrs":{"Price":"Negotiation","Brand Name":"JUTAI","Model Number":"GL- WLAN","Minimum Order Quantity":"Support 1-10 pcs for sample","Delivery Time":"5-8 working dag","Certification":"CE","Place of Origin":"Shenzhen China","Payment Terms":"T\/T, Western Union, Wechat, Alipay, Paypal","Supply Ability":"5000 pcs per month","Packaging Details":"Carton","Power input":"DC 12-24V\/1A (5V customizable)","Relay Output":"2\/3-channel shared common terminal","Load":"DC 30V\/2A, AC 220V\/1A","Interfaces":"1\u00d7CAN, 1\u00d7RS485, 2\u00d7RS232","Communicate":"WIFI\/4G + Buletooth","Operating temperature":"-30~80\u00b0C"}}

{"cid":"91199119","title":"Modbus RS485 IOT Router MQTT Data Acquisition Module with WIFI and Sim Card","imgUrl":"https:\/\/img.chinax.com\/nimg\/af\/b2\/445a6354493f24c95637f0772343-200x200-1.jpg","attrs":{"Price":"USD95~99\/PCS","Brand Name":"IOTROUTER","Model Number":"ZHL4931","Minimum Order Quantity":"1PCS","Delivery Time":"3 WEEKS","Certification":"FCC ROHS CE","Place of Origin":"SICHUANG, CHINA","Payment Terms":"L\/C, T\/T, Western Union","Supply Ability":"50000PCS\/MONTH","Packaging Details":"270*180*60mm Carton Package","Chipset":"QUECTEL-EC25","Ports":"RJ-45, RS485+DI+DO+WAN+4LAN","Product Name":"Modbus RS485 IOT Router","System":"Linux","Working Voltage":"12V","Module Type":"4G LTE","Material":"Galvanized Steel Sheet","Color":"Black","Customized":"Support","Working Temperature":"20\u2103~70\u2103"}}