XIAO ESP32C6 - Expected RSSI with internal antenna

Products & Technology XIAO
5

Try this:

// 8[dBm] * 4 = 32
esp_wifi_set_max_tx_power(32);

To explicitly use the on-board antenna.

#define RF_SW_PWR    3  // RF switch power pin
#define RF_PORT     14  // RF port select pin

  // RF switch select default setting LOW:power on, LOW:built-in antenna
  pinMode(RF_SW_PWR, OUTPUT);
  digitalWrite(RF_SW_PWR, LOW);   // LOW:power on
  pinMode(RF_PORT, OUTPUT);
  digitalWrite(RF_PORT, HIGH);    // HIGH:external antenna