Lora-Mac=‎FFFFFFFFFFFFFFFF

[bucknall]

@Camot What happens now if you run the command

binascii.hexlify(lora.mac())

?

[Camot]

@bucknall said in Lora-Mac=‎FFFFFFFFFFFFFFFF:

binascii.hexlify(lora.mac())

binascii.hexlify(lora.mac())                                                                                        
b'ffffffffffffffff'

[Camot]

@Camot said in Lora-Mac=‎FFFFFFFFFFFFFFFF:

@bucknall said in Lora-Mac=‎FFFFFFFFFFFFFFFF:

binascii.hexlify(lora.mac())

binascii.hexlify(lora.mac())                                                                                        
b'ffffffffffffffff'

Any news? My Lopy still have this invalid Lora-MAC

[bucknall]

Hi @Camot, I've checked with Daniel and he asked me to verify if you used the ESP-IDF tool to erase the flash on your device?

Try performing another firmware update and it should correctly write over the flash with our firmware and correct the LoRa MAC address.

Thanks for your patience!

[daniel]

Hello @Camot,

Did your LoPy was ever flashed with a custom firmware using the IDF? Did you perform a bulk erase on the flash memory?

Cheers,
Daniel

[Camot]

I made another Firmware update but the MAC address is still FFFFFFFFFFFFFFFF

[Camot]

@bucknall @daniel

any News?

[cinezaster]

@bucknall Still having this issue.

I upgraded firmware LoPy to '1.7.9.b3'.
PyTrack firmware is v0.0.4
LoPy Model: LoPy1.0r

[bmarkus]

@Camot said in Lora-Mac=‎FFFFFFFFFFFFFFFF:

print(binascii.hexlify(lora.mac()).upper().decode('utf-8'))

Try:

print(binascii.hexlify(lora.mac()))

[cinezaster]

@bmarkus unfortunately that doesn't work either. I already tried this.
Also when I look at the output of lora.mac() it returns b'\xff\xff\xff\xff\xff\xff\xff\xff' so one could only expect the id to be FFFFFFFFFFFFFFFF.

[emerout]

Hello,

I have the same problem, address returned by lora.mac() is still FFFFFFFFFFFFFFFF.

History :

First time I played with Lopy, I have a different and right mac address.
Then I try to use a custom firmware, flash it, with no success (other story with external lib)

I came back to official firmware LoPy_868-1.7.6.b1.
And know it is stuck with this ffff... mac.

Any help appreciated !

[robert-hh]

@emerout Did you try to erase the flash with esptool.py?

[cinezaster]

@robert-hh I did try it to erase the flash.

[emerout]

@robert-hh said in Lora-Mac=‎FFFFFFFFFFFFFFFF:

@emerout Did you try to erase the flash with esptool.py?

I have performed :
$ bin/esptool.py --port /dev/tty.usbserial erase_flash

and then :
$ bin/updater.py -t Downloads/LoPy_868-1.7.8.b1.tar.gz -p /dev/tty.usbserial -s 921600 flash

re-uploaded my program,

No success, mac is still FFFF...

[emerout]

Is it possible to set lora device address programmatically when operate in OTAA mode ?

[robert-hh]

@emerout Did you check between erase & reflash, whether the device was erased? For instance by trying to run it.

[emerout]

@robert-hh Yes, after erase there wasn't any python >>> prompt.
Then after flashing firmware, my boot.py and main.py was gone.

[Xykon]

The Lora MAC is actually stored in flash memory. You can set it by uploading an 8 byte binary file containing your MAC address as /flash/sys/lpwan.mac (see github source)

Try running the following code directly on your LoPy to generate the file (make sure to use a unique MAC address):

fo = open("/flash/sys/lpwan.mac", "wb")
mac_write=bytes([0x01,0xb1,0xd1,0x41,0x91,0x31,0xb1,0xb4])
fo.write(mac_write)
fo.close()

Then reset your LoPy... you should see the following message during boot on the serial console: LPWAN MAC write OK

Let me know if this works for you

[emerout]

@Xykon That's work !! :-) thanks a lot

[cinezaster]

@Xykon Thanks