String payload
= "[{\"variable\":\"" VARID1
"\",\"value\":" + String(buffer_at
) + "},{\"variable\":\"" VARID2
"\",\"value\":" + String(buffer_at2
) + "},{\"variable\":\"" VARID3
"\",\"value\":" +String(55) + "},{\"variable\":\"" VARID24
"\",\"value\":" +1 ,
"\context\":" + {"lat" + ":" buffer_at,
"lng" + ":" buffer_at2
} + "}"
U3RyaW5nIHBheWxvYWQgPSAiW3tcInZhcmlhYmxlXCI6XCIiIFZBUklEMSAiXCIsXCJ2YWx1ZVwiOiIgKyBTdHJpbmcoYnVmZmVyX2F0KSArCiAgICAgICAgICAgICAgICAgICAgICJ9LHtcInZhcmlhYmxlXCI6XCIiIFZBUklEMiAiXCIsXCJ2YWx1ZVwiOiIgKyBTdHJpbmcoYnVmZmVyX2F0MikgKyAifSx7XCJ2YXJpYWJsZVwiOlwiIiBWQVJJRDMgIlwiLFwidmFsdWVcIjoiICtTdHJpbmcoNTUpICsgIn0se1widmFyaWFibGVcIjpcIiIgVkFSSUQyNCAiXCIsXCJ2YWx1ZVwiOiIgKzEgLCAiXGNvbnRleHRcIjoiICsgeyJsYXQiICsgIjoiIGJ1ZmZlcl9hdCwgImxuZyIgKyAiOiIgYnVmZmVyX2F0Mn0gKyAifSI=
Main.java:1: error: class, interface, or enum expected
String payload = "[{\"variable\":\"" VARID1 "\",\"value\":" + String(buffer_at) +
^
Main.java:2: error: illegal escape character
"},{\"variable\":\"" VARID2 "\",\"value\":" + String(buffer_at2) + "},{\"variable\":\"" VARID3 "\",\"value\":" +String(55) + "},{\"variable\":\"" VARID24 "\",\"value\":" +1 , "\context\":" + {"lat" + ":" buffer_at, "lng" + ":" buffer_at2} + "}"
^
2 errors