API to set RF TX Power Level

[Humancell]

I have looked around and can not find an API to set the Wifi RF TX Power Level. According to this post, the SDK esp_iot_sdk_v1.1.0_15_05_22 added this capability.

Is this already exposed someplace, or can this API be exposed? I have not been able to locate it in any documentation here.

http://www.esp8266.com/viewtopic.php?f=13&t=3072&sid=39bf5cb2ff5f17bbc6faf06503064cc3&start=5#p18209

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[avivgr]

Any update? i am looking for the same thing. Also wondering what is the default max power in case the set api is not explicitly called?

[chaeplin]

use WiFI.setOutputPower

Arduino/libraries/ESP8266WiFi/src/ESP8266WiFiGeneric.cpp

Lines 169 to 179 in 4107424

	void ESP8266WiFiGenericClass::setOutputPower(float dBm) {
	if(dBm > 20.5) {
	dBm = 20.5;
	} else if(dBm < 0) {
	dBm = 0;
	}
	uint8_t val = (dBm*4.0f);
	system_phy_set_max_tpw(val);
	}

[babylonx]

What happens if you never call setOutputPower? What is the default transmission power set?

[Stefano-Orsolini]

@babylonx
from measurements I can tell that it sets to maximum TX power.
I see 19dBm difference between default and using setOutputPower(0)

[devyte]

The NONOS SDK api reference for SDK v2.1.0 explains that the function takes values in the range [0-82], which means the argument for our wrapper is in the range [0-20.5].
Closing.