DevHeads IoT Integration Server•14mo ago

OMG tell me more buddy

Marvin•11/19/24, 1:55 PM

Been working with the bruce firmware here https://github.com/pr3y/Bruce
I have had fun with BLE and WiFi.
It is easy to clone an access point and get devices to connect to it in guise of the legitimate network.
You can show feed them custom HTML to steal credentials. It is scary what malicious actors can do with search devices.
I just got the Nordic nRF24L01, I will connect it to test our bruce's nrf jammer.

GitHub

GitHub - pr3y/Bruce: Predatory ESP32 Firmware

Predatory ESP32 Firmware. Contribute to pr3y/Bruce development by creating an account on GitHub.

Ttechielew @hemalchevli what's up dude do you have experience with routing CAN signals?

Hemal•11/19/24, 2:28 PM

Yup, I have designed few automotive PCBs

Dhruv•11/20/24, 6:59 AM

Hi Everyone, My self Dhruv, I am an IOT engineer from Pune, India. My tech stack includes Python, Raspberry Pis, Communication protocols, Industrial Automation, AWS IOT and Docker, Kuberenetes.

DDhruv Hi Everyone, My self Dhruv, I am an IOT engineer from Pune, India. My tech stack...

Marvin•11/20/24, 7:05 AM

Hey @Dhruv
Welcome to DevHeads.
Is there something you are currently working that you can share with us?

Dhruv•11/20/24, 7:27 AM

surely will do share it in sometime. @32bitSaviour .

Dhruv•11/20/24, 7:52 AM

currently I am working on FEIG payment devices, which uses nfc cards for the metro rail ticketing systems. other part I am working on linux background services for my python scripts.

DDhruv currently I am working on FEIG payment devices, which uses nfc cards for the me...

Marvin•11/20/24, 7:56 AM

Nice. I also work in payments. With EMVco type payment devices most running on top of a embedded Linux OS.
At what level do you work bare-metal, RTOS or embedded Linux?

Dhruv•11/20/24, 8:01 AM

Actually I am working on top layer. not inside the feig device itself. so, basically I had a top layer code which is already working. I am trying to understand the code, flows only.

Dhruv•11/20/24, 8:02 AM

I have the code that read and write data to card and validate it using apis.

Dhruv•11/20/24, 8:03 AM

I am not working on device's core functionality.

DDhruv currently I am working on FEIG payment devices, which uses nfc cards for the me...

melta101•11/20/24, 8:24 AM

demn
that's nice
Which Metro company?
BMRCL?

Dhruv•11/20/24, 8:27 AM

@melta101 , oops, sorry I can not share the name, as I have to follow Non Disc. Agreement.

Dhruv•11/20/24, 8:27 AM

but its located in north india

melta101•11/20/24, 8:27 AM

Ahh,
No prob
It's cool

melta101•11/20/24, 8:27 AM

Still,
Fun stufff

Dhruv•11/20/24, 8:28 AM

btw BMRCL means banglore metro ?

DDhruv btw BMRCL means banglore metro ?

melta101•11/20/24, 8:28 AM

yep

Dhruv•11/20/24, 8:29 AM

oh. thats great I was not aware that banglore have metro.

melta101•11/20/24, 8:29 AM

its been there was i think for more than a decade

Dhruv•11/20/24, 8:30 AM

that is amazing, btw are you native from karnataka or belong to somewhere else and doing job there?

DDhruv that is amazing, btw are you native from karnataka or belong to somewhere else a...

melta101•11/20/24, 8:31 AM

grown up in karnataka for the most part

Dhruv•11/20/24, 8:34 AM

Okay.

melta101•11/20/24, 8:35 AM

related to payment,
I have ventured into UPI QR generation in embedded devices
though it was so bad, when i see it now

DDhruv I have the code that read and write data to card and validate it using apis.

Marvin•11/20/24, 8:36 AM

what kind of cards are they? just regular NFC?

MMarvin what kind of cards are they? just regular NFC?

melta101•11/20/24, 8:37 AM

yep

melta101•11/20/24, 8:37 AM

each card
if i am not wrong
hold-iD and amount stored

Marvin•11/20/24, 8:38 AM

I just finished some work on UPI for contact and contactless payments. Very interesting how they do things somewhat detached from VISA and Mastercard.

MMarvin I just finished some work on UPI for contact and contactless payments. Very inte...

melta101•11/20/24, 8:39 AM

yep
also 0 commision
best part

Mmelta101 yep also 0 commision best part

Marvin•11/20/24, 8:42 AM

is UPI used a lot in your region?

MMarvin is UPI used a lot in your region?

melta101•11/20/24, 9:00 AM

it was made in my country

melta101•11/20/24, 9:00 AM

i forgot about cash for so long

melta101•11/20/24, 9:01 AM

now a days
if i have to travel anywhere
its just my phone and earpods
no need of wallet lol

Mmelta101 it was made in my country

Marvin•11/20/24, 9:10 AM

Oh wait I see. We are talking about two different UPIs.
On my end it is UnionPay, they also call it UPI on your end it is the Unified Payments Interface. Tell me about it.

MMarvin Oh wait I see. We are talking about two different UPIs. On my end it is UnionPay...

melta101•11/20/24, 9:12 AM

Oh damn

Totally did'nt realize it

so basically UPI is a protocol which helps in real-time bank xfers

melta101•11/20/24, 9:17 AM

This was mainly introduced because lots of corruption was done using cash.
So when the gov suddenly replaced top currency notes. it gave more push to use UPI

melta101•11/20/24, 9:18 AM

so unlike MasterCard and VISA which takes a cut from every payment
from UPI, it doesnt take anything from anyone(buyer,seller, app that integrated UPI)

Marvin•11/20/24, 9:22 AM

that is very neat. And the NFC cards can be tokenized in some app? I am assuming the phone has to be NFC enabled.

MMarvin that is very neat. And the NFC cards can be tokenized in some app? I am assuming...

melta101•11/20/24, 9:25 AM

NFC
which dhruv was talking about is different in this context
that NFC is meant to be only used within Metro stations
Every station entry and exit have card reader that help with this

if you want to update the amount, you would need to give to the counter present there to update it.

melta101•11/20/24, 9:26 AM

UPI uses UPI ID(which are most often QR code) to xfer money

Mmelta101 NFC which dhruv was talking about is different in this context that NFC is meant...

Marvin•11/20/24, 9:31 AM

Right.

Mmelta101 UPI uses UPI ID(which are most often QR code) to xfer money

Marvin•11/20/24, 9:31 AM

So in order to make a payment, a merchant will scan my UPI QR? Or I scan theirs?

MMarvin So in order to make a payment, a merchant will scan my UPI QR? Or I scan theirs?

melta101•11/20/24, 9:32 AM

we scan thier

melta101•11/20/24, 9:33 AM