ThingSpeak

I have recently installed an NCD MegaModem paired with an NCD Temperature sensor for our lab freezers (-80c). I have set the gateway for MQTT transmissions. I can see that my MQTT gateway is transmitting data to mqtt… ….com:1883 since I am getting the following output: {"channel":{"id":1155233,"name":"baolab","latitude":"0.0","longitude":"0.0","field1":"temperature_celsius","created_at":"2020-09-23T15:38:10Z","updated_at":"2020-09-23T22:07:26Z","last_entry_id":7982},"feeds":[{… …"created_at":"2020-09-25T17:13:36Z","entry_id":7981,"field1":"{"transmission_count":105,"battery_level":3.06544,"type":39,"node_id":0,"rssi":34,"temperature_celsius":-80.18}"},{"created_at":… …"2020-09-25T17:13:58Z","entry_id":7982,"field1":"{"transmission_count":107,"battery_level":3.06544,"type":39,"node_id":0,"rssi":31,"temperature_celsius":-80.08}"}]} My question is… …: How can I select/choose to show only temperature_celsius on the graph? Right now I am not getting anything on the graphs. Field1 name is temperature_celsius. Thanks a lot!