How to get ESP8266 Wifi MAC ?

[espruino-discuss]

Posted at 2015-11-24 by @MaBecker

can someone please explain how to get the wifi mac

[espruino-discuss]

Posted at 2015-11-24 by tve

I don't think we have a function for that :-)

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Posted at 2015-11-24 by @gfwilliams

Do you mean when running Espruino on the ESP8266 itself, or when running on an Espruino board connected to the ESP8266?

If it's on the Espruino board I'm not sure there's a function, but you can add one with a simple bit of code. Something like:

  wifi.getMAC = function(callback) {
    var mac;
    at.cmdReg("AT+CIFSR\r\n", 1000, "+CIFSR", function(d) { 
      if (d.indexOf("STAMAC")>=0) mac=JSON.parse(d.slice(d.indexOf(',')+1)); 
    }, function(d) { 
      if (d!="OK") callback("CIFSR failed: "+d); 
      else callback(null, mac); 
    });
  }

//
wifi.getMAC(function(err,mac) {
  console.log(mac);
});

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Posted at 2015-11-24 by @MaBecker

running Espruino on ESP8266, like esptool.py does:

esptool.py --port /dev/cu.usbserial --baud 115200 read_mac

Connecting...
MAC: 18:fe:34:05:99:c9

inside esptool.py

// OTP ROM addresses
    ESP_OTP_MAC0    = 0x3ff00050
    ESP_OTP_MAC1    = 0x3ff00054

def read_mac(self):
        mac0 = self.read_reg(self.ESP_OTP_MAC0)
        mac1 = self.read_reg(self.ESP_OTP_MAC1)
        if ((mac1 >> 16) & 0xff) == 0:
            oui = (0x18, 0xfe, 0x34)
        elif ((mac1 >> 16) & 0xff) == 1:
            oui = (0xac, 0xd0, 0x74)
        else:
            raise FatalError("Unknown OUI")
        return oui + ((mac1 >> 8) & 0xff, mac1 & 0xff, (mac0 >> 24) & 0xff)

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Posted at 2015-11-24 by @gfwilliams

Well, you could try peek32(0x3ff00050).toString(16) and peek32(0x3ff00054).toString(16)?

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Posted at 2015-11-24 by @MaBecker

thats it - thanks !

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Posted at 2015-11-24 by Kolban

@MaBecker From your post, a new issue was created (Issue #722) .. fortunately, it wasn't difficult at all to add and can now be found in the latest builds.

See:

espruino/Espruino#722

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Posted at 2015-11-24 by @MaBecker

@Kolban Thanks !

so now we have the last part of the MAC: 05:99:c9

wifi.getIP();
={ "ip": 0, "netmask": 0, "gw": 0,
"mac": "5ccf7f 599c9"
}

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Posted at 2015-11-25 by @gfwilliams

@Kolban there's some code in network.c that will properly format the Mac address into a string. Check out how WIZnet does it

 networkPutAddressAsString(data, "mac", &gWIZNETINFO.mac[0], 6, 16, ':');

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Posted at 2015-11-25 by Kolban

Perfect ... added to Issue #722 as a task to be done before completion of that issue.

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Posted at 2015-11-26 by tve

Should be in an upcoming build thanks to Kolban's fix :-).