Unable to upload the data on thingspeak using uno and esp8266
You have a malformed HTTP request. You only have half of the first line.

A valid HTTP request would look more like this:

GET /update?api_key=DXDPC4MLXMXFB5TT&amp;field1=60 HTTP/1.1
Host: api.thingspeak.com
Content-length: 0
Connection: close
&lt;blank line&gt;


Just sending "GET : ain't gonna work. For a start, the server won't know what protocol you're speaking (HTTP/1.1), nor what website it's supposed to direct the request to (Host: api.thingspeak.com). Also, the final extra blank line is required to finish the request.