@Gijs This is what I get: >>> pybytes.smart_config(True) Smart Provisioning started in the background See https://docs.pycom.io/smart for details >>> Guru Meditation Error: Core 0 panic'ed (LoadProhibited). Exception was unhandled. Core 0 register dump: PC : 0x4015259c PS : 0x00060f30 A0 : 0x80152bff A1 : 0x3ffd3860 A2 : 0x00000000 A3 : 0x00000001 A4 : 0x3ffdfbbc A5 : 0x00000001 A6 : 0x000000fe A7 : 0x00000001 A8 : 0x800967f0 A9 : 0x3ffd3880 A10 : 0x00000003 A11 : 0x00060f23 A12 : 0x00060f20 A13 : 0x00000001 A14 : 0x000000fe A15 : 0x00000000 SAR : 0x00000020 EXCCAUSE: 0x0000001c EXCVADDR: 0x00000010 LBEG : 0x40094230 LEND : 0x4009425e LCOUNT : 0xffffffff ELF file SHA256: 0000000000000000000000000000000000000000000000000000000000000000 Backtrace: 0x4015259c:0x3ffd3860 0x40152bfc:0x3ffd38a0 0x401583ac:0x3ffd38d0 ================= CORE DUMP START ================= ================= CORE DUMP END ================= Rebooting... ets Jun 8 2016 00:22:57 rst:0xc (SW_CPU_RESET),boot:0x12 (SPI_FAST_FLASH_BOOT) configsip: 0, SPIWP:0xee clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00 mode:DIO, clock div:1 load:0x3fff8020,len:8 load:0x3fff8028,len:2128 load:0x4009fa00,len:19760 entry 0x400a05bc It stays at this point until I reboot or something. And when I press reset it goes back to the loop problem.

@eric73 Yes, the sequence was exactly my problem. Disengaging solved it :)

@devinv it takes a while for a GPS chip to get a fix. You definitely won’t get a position right after wake up, the chip needs to receive ephemeris data, lock onto satellites, compute a position... This has been discussed several times in the forum, search for the relevant topics for details.

@robert-hh I just connected power drectly. That works, now I have to do some soldering in order to check if it works together with the level-shifter. Thx so far!

HI @ropito, I've tested it and I see that it indeed doesn't display the project name when working on windows. It's only a UI issue though. It does detect your project and will upload files from it when using the upload or download feature. It's just the UI label that doesn't display the name. I'll look into it and will fix the label in the next release.

@szyba91 P12 can be pulled up directly. But using a resistor is also OK. 4.7K is a good choice. CTRL-F is to be pushed in the Terminal window, where you expect the REPL prompt. it will be caught the the serial interrupt handler.

@dicktonyboy You could check, whether P2 is connected at least to the RGB Led. It is one of the connections faced to the LoPy Shield, opposite to P2. [image: 1526890778035-lopy.jpg]

ouch... In Pycom's webpage, the last version of DFU that is writen is pytrack_0.0.4.dfu and I do not download because it's the version that I have now: "The latest firmware is v0.0.4. The DFU file can be downloaded from the links below:" But, if open the link, the version is 0.0.6.... Sorry, it's my fault! Works again!

@iplooky FYI this 'GetOverlappedResult' error on windows has now been solved with Pymakr 1.2.2. Let me know if it works for you!

Hi @cylex can you please share your code so we can help you? Thanks, Alex

@jmarcelino Is this problem fixed?

@zmrzli Make sure you are sending the correct length and AD types according to the ADVERTISING AND SCAN RESPONSE DATA FORMAT (page 2081 on the Bluetooth 4.2 Core Spec - you can access the specification here https://www.bluetooth.com/specifications/adopted-specifications ). If you're looking to use BLE advertising packets to send your data you probably want to use AD type 0xFF (Manufacturer Specific Data) followed by the 2 company identifier octets. So your format should be 1 byte length + 0xFF + <2 bytes company identifier> + your data then filled with 00 until the 31 byte limit. You can't read improperly formatted advertising data.