Ezb V4 Custom Firmware V2


Hello Everyone,

I've been busy improving and testing the Firmware, but to avoid delaying more.

I'm releasing the binary here:


I've plans to create a github repository similar to the V1 version plus some posts about the development challenges.

it will take extra time meanwhile i would love to get some feedback from the community.

Combining the last hardware manufacturer firmware (Blue Giga) plus optimizing the BGS code, i believe the new firmware is more stable and reliable.

I've introduced new features (next post) so i cannot guarantee is bug free Smile


I've a friend that runs a robotic classes & extra school Activities (no EZR hardware yet), so i lend him a few ezbs and ez-bits to introduce EZR to his students.

Some of his teenager students decided to "sabotage" other students rebooting or changing the servos positions plus adding other devices to the school network (password is open in the client page) .

They had some fun trolling around.

To avoid those issues I decided to improve the EZB http server security.
To access pages: Access Point, Client, Ezb, Ports, Security you will need to authenticate first:

User-inserted image

the default password is password.

you can then later change via Security page:

User-inserted image

Also the Client & AP security keys are masked "*" just in case you browsing around with someone looking:

User-inserted image

The initial page is always accessible without authentication:

User-inserted image

although the reboot button is only available if you are authenticated.

If you reboot the EZB, or someone else authenticates, your session is gone, and the browser will redirect you to the login page when you try to access the secured pages.

Thumb rule:
Only one user authenticated on the EZB HTTP Server.

I hope this will keep away the middle school bullies.


more changes:

1) Overview page shows the Client Remote IPs connected to the EZB and the Camera.

I've plans to log these events to a server, that will help to avoid students messing other EZBs.

2) When in client mode, EZB synchronizes the time with a time server only once after the connection is established.

Although the hardware and the firmware supports a RTC (Real Time Clock) the EZR pcb does not have a required 32kHz crystal.

@Jeremie i know the PCB space is always a constrain, but if please next time think about hackers and add extra connections pins/soldering points for the remain IO pins, add-ons etc.

So without a hardware RTC, the clock is software based... expect to loose some seconds.

One possible solution is to keep updating the clock

I have more ideas and some of them requires a clock, for example performing some actions based on time/day of week.

It was a really fun challenge, but the EZR future is with another chip.

I have other projects between work and family, the free time is not enough to explore all the ideas.


Everywhere ip is used. Very important number.


Hi ptp,

Loaded the firmware onto one of my V4's today.

So far everything is looking good. Great work on this!

I'll let you know if I run into any glitches.



Absolutely fantabulous work @ptp. I wish I had a programmer to load this firmware!

You pretty much hit the nail on the head for my initial ideas about what I felt could be improved in the web interface. Authentication being a big one!

Good job and keep it up!


Programmer is $14 clone off E-Bay... Well worth the investment to do this upgrade.


There is no ebay where I live, and international shipping to here is hit or miss unless you use DHL or similar.

(which is normally 3 times the price of the item) *eyeroll*


@PTP, Awesome work on this new firmware. I am working on indoor navigation project, is it possible you could add a way to view wifi access points and there signal strength?
Also have this info available in EZ-Builder
My hope is to use 3 APs signal strengths to triangulate my position.