I use the Arduino IDE 1.6.8 with board manager v 2.0.0 to program the ESP8266 Using the following commands to set the requested wifi settings: wifi_set_phy_mode(PHY_MODE_11G); system_phy_set_max_tpw(powervalue max 82); divide by 4 for dBm value WiFi.mode(WIFI_STA); This helped me with the SR505 on ...