How to get ESP8266 Wifi MAC ?

can someone please explain how to get the wifi mac

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

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);
});

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)

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

thats it - thanks !

@MaBe 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:

https://github.com/espruino/Espruino/issues/722

@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"
}

@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, ':');

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

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