Huawei+modem+unlocker+v577+work
The term "v577" is often associated with specific iterations of code calculators or dashboard unlocking utilities. However, in the official timeline of popular unlock tools (such as the famous Huawei Modem Unlocker by Bojs and Huawei Code Calculator), version numbers usually follow standard software progression (e.g., v1.1, v2.0, v3.0, etc.).
If you are searching specifically for "v577," it is likely a misinterpretation of a database version or a custom-modified tool released on specific tech forums. Here is the reality of how these tools work:
The Huawei v577 is a common 4G/LTE CPE (Customer Premises Equipment) router. It’s the white plastic box that sits on a window sill, converting a SIM card’s cellular signal into Wi-Fi for a small office, a home in a dead zone, or a camper van. huawei+modem+unlocker+v577+work
By default, these devices are heavily restricted. They are often “locked” to a specific carrier, preventing users from inserting a cheaper or more capable SIM card. Settings menus are disabled. Bands are hidden. The user is treated as a renter, not an owner.
Enter the unlocker.
Here is the safe, reliable path (not the mythical one-click solution):
If you cannot get the Huawei Modem Unlocker V577 to work, don't waste hours. Use one of these proven methods: The term "v577" is often associated with specific
Insert a SIM card from a different carrier. If the modem connects to the network and shows signal bars, Huawei Modem Unlocker V577 worked.
Yes, if:
No, if:
| Problem | Likely Cause | Solution | |---------|--------------|----------| | Tool says “Modem not found” | Wrong COM port or drivers not installed | Install Huawei NDIS driver, then use Device Manager to find AT port (usually COM3-COM8) | | Flash fails at 20% | Corrupted firmware file | Re-download the B220 firmware from a trusted mirror (checksum: e9a4b... ) | | Unlock code generated but invalid | Modem has newer lock algorithm | Downgrade again – you missed a step. Reflash B220 twice. | | Modem bricked (no LEDs) | Power loss during flash | Use JTAG recovery or consider modem dead – always use UPS power. | No, if: | Problem | Likely Cause |
Nice guide. Are you planning to add photos of the wiring and such?
Thanks for the reminder, I did have a couple of extra pictures to add.
Thanks for this very detailed guide. Now im with less money in my wallet, but an old Wanhao with a brand new SKR board 😀
For those who struggles to connect the stock wanhao i3 1.2 LCD display. I got it working by connecting the following pins:
pin 1 LCD CS –> 1.19 EXP 1
pin 2 Encoder B –> 3.25 EXP 2
pin 3 LCD Data –> 1.18 EXP 1
Pin 4 Encoder A–> 3.26 EXP 2
pin 5 LCD SCLK –> 1.20 EXP 1
pin 6 Encoder Button –> 0.28 EXP 1
pin 7 ESTOP –> I dont use that one- so did not try to find it
pin 8 Beeper –> 1.30 EXP 1
Pin 9 5v –> 5V EXP 1
pin 10 GND –> GND EXP 1
LCD pins should like this:
1 2
3 4
5 6
7 8
9 10
Once again, thanks for this guide!
Awesome, thanks for the LCD pinout!
Thank You so Much for the Information … we are all remain indebted to You … Thank You …
What setting did you use?
Had several problems doing this with tmc 2130 and 2100.
Could not make the dual z work, tried lots of things. Ended up doing z steppers in paralell from one driver and upping its vref.
For some weird reason the steps per mm on z axis was off, had to make it 100 steps/mm for it to move correctly.
seems that the SKR doesnt support flashing firmware by octoprint without modifications which is a bit of a drag but then again it is pretty easy to do by sd card.
Not done with the build yet so more problems may occur.
hmm, in my wanhao i3 v.2.1, the z axis uses stepper motors with a maximum current of 0.47 amperes. I suspect that 0.76 is too much for them.
As I recall reading when I did the upgrade the Z motor amps need to be doubled if ran in parallel, I just did some Googleing and found that to be true. You could most likely cut this in half if using dual Z steppers. Thanks for pointing this out!
Hello, Thanks for a great guide but how should I connect the endstops ?
As far as I remember they endstops are plugged into the bottom two pins if looking at the picture posted. I didn’t change the endstop plugs, some people did. I just plugged em into the board and they fit fine for me, no issues.
Big thanks for writing this. Followed the instructions and only had a few hiccups. That being said, the crimper tool makes me want to outright murder someone.
No problem, glad it helped! What hiccups did you hit? Anything that I should note or update that caused them? And you are so right, that crimper has a learning curve.
This guide doesn’t work for me anymore. Please if anyone has a ready to go and complete bugfix folder they can upload for me you’d be saving me a fucking headache. Been at this for weeks since I got my replacement skr. First one and first time worked great for me.
What does not work? I haven’t tried this config yet but I have built and flashed SKR boards with Malin 2.X and this includes every thing you need.
Visual Studio gave me a hard time .. thank you utube. the debug version of Marlin was missing the Marlin.ini require to open the project with the MARLIN-2.0.X I was able to go and edit the cpu on platformio.ini than the Configuration.h and Configuration_adv.h ..
Great guide! I’m using it for my Maker Select v2.1 and I have the printer working 99% but I have one major problem I cannot figure out. The X axis is not homing properly. Instead of moving in the negative direction and stopping at the X endstop it moves in the positive direction about 5-10mm and sets that as the X home position. Any ideas? The Y and Z homing is perfect, only the issue with X
Have you tried inverting the direction? It has been a long while since I have fiddled with the firmware but there are a couple spots that you may need to play with. I would try inverting the X axis, either the driver itself or probably home direction. 1 should be the right side and -1 the left side I believe, flip flop whatever you have tried and see. If you have already tried this then I am not sure, I would hop on a Facebook group. I am in a few, some for BigTreeTech and a few for the Maker Select. The groups are active and a lot of people offer help. Sorry I couldn’t be of more help. But if you get it fixed please let me know how you did it.
#define INVERT_X_DIR true/false
and
#define X_HOME_DIR 1/-1
and
#define USE_XMIN_PLUG vs #define USE_XMAX_PLUG
Thanks for the quick response. I did try inverting before and that caused grinding. I might have a work around, if I push the x carriage against the endstop and home x it appears to home x properly. I’ll have to level the bed and try a test print to confirm.
Im probably going to give this a shot. Many thanks for the in-depth explanation beforehand. I appreciate the fact that you haven’t abandoned this post.
Just wanted to say thank you for this guide. Used it to upgrade my printer a few days back and this made it a lot easier to do. I made my own congfig.h and adv files but followed through with your changes for the most part and have been happy with how it’s gone. I got the TFT35 v3.0 and it was probably unneeded since I mostly use octopi, but I like it.
I also use an inductive probe, and that’s the only issue I really ran into. The z-endstop pins apparently have a pull up on them. This caused some issues, so I changed the pin for Z_MIN_PIN to P2_00 in pins_BTT_SKR_V1_3.h and plugged the signal wire into that pin on the board, which is the servos header right/yellow/orange pin. After doing that, it works like a charm.
Here’s the diagram showing the pin at the bottom. https://user-images.githubusercontent.com/613805/68263383-825d1500-000b-11ea-8401-5e8566dbd149.png
I made brackets for the SKR so you can access the USB and sd card externally
https://www.thingiverse.com/thing:4920438
How is this working for you long term? I am about to do the same exact thing after letting everything sit in a corner for 2 years…
I still use the printer and the SKR from this post, but along the way I dropped Marlin and adopted Klipper. If I had to do it all over again I would rethink how I mounted my printer permanently to the Ikea LACK table I used and the location of my Raspberry Pi, this makes it a pain to work on and move around. Other than that it has been great.
https://www.itsalllost.com/adventures-in-klipper/