Making UserAgent string constant in progmem

Author: vlastahajek

src/InfluxDbClient.cpp

@@ -30,8 +30,6 @@
 #define STRHELPER(x) #x
 #define STR(x) STRHELPER(x) // stringifier
 
-#define INFLUXDB_CLIENT_USER_AGENT "influxdb-client-arduino/" INFLUXDB_CLIENT_VERSION
-
 #if defined(ESP8266)
 # define INFLUXDB_CLIENT_PLATFORM "ESP8266"
 # define INFLUXDB_CLIENT_PLATFORM_VERSION  STR(ARDUINO_ESP8266_GIT_DESC)
@@ -40,6 +38,7 @@
 # define INFLUXDB_CLIENT_PLATFORM_VERSION  STR(ARDUINO_ESP32_GIT_DESC)
 #endif
 
+static const char UserAgent[] PROGMEM = "influxdb-client-arduino/" INFLUXDB_CLIENT_VERSION " (" INFLUXDB_CLIENT_PLATFORM " " INFLUXDB_CLIENT_PLATFORM_VERSION ")";
 
 // Uncomment bellow in case of a problem and rebuild sketch
 //#define INFLUXDB_CLIENT_DEBUG
@@ -222,8 +221,7 @@ bool InfluxDBClient::init() {
     }
     _httpClient.setReuse(false);
 
-    String userAgent(INFLUXDB_CLIENT_USER_AGENT " (" INFLUXDB_CLIENT_PLATFORM " " INFLUXDB_CLIENT_PLATFORM_VERSION ")");
-    _httpClient.setUserAgent(userAgent);
+    _httpClient.setUserAgent(UserAgent);
     return true;
 }