The payment gateways (Anyone) Is they treat Credit card as different and debit card as different?
because I am in the middle of integrating one of payment gateway in our application and See in there documentation has separate API's for Debit Card and Credit Card.
As far as your payment gateway is concerned a debit card and a credit card are processed the same way. This has been my experience with Authorize.net, Braintree, and Paypal.
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I'm from Kazakhstan. I use "paywall.pw" system for paid subscription to private channel in telegram. But I need an American analogue of this system for withdrawing in dollars to an American card.
I want to understand how and where i can perform an EMV Transaction online PIN Verification.
Suppose i have a few POS terminal and also a Visa Cybersource account, i'am able to perform an EMV Transaction on the terminal , however most EMV Transaction request that we perform an Online PIN verification ,i'm able to extract the basic details needed to charge the card example data ,trackData ,PINBLOCK ,KSN and some TLV Data.
I cant find resources to perform an Online PIN Verification if the EMV Transaction request for it ,especially the VISA cybersource developer page, infact i dont know where to perform the verification or how it works.
A brief lessons and directed resources will be appreciated.
A few things you need to understand to verify PIN, and in most cases this is very much the standard, but can't help unless you share more details.
PIN Block is formed from Card number and PIN, and mostly by ANSI PIN
Block format 0
The received PIN block is Triple DES encrypted by
the sender's key called AWK ( acquirer working key )
You need to have the corresponding key IWK ( issuer working key ).
Send card number, PIN Block, IWK, PIN Block format, PIN Verification Key, PIN
verification Key index to HSM
HSM will respond with whether PIN is
successful or no.
As described, BLE Scanner can not know the advertising channel.
How to get BLE advertising channel index number
But, in the link below, at first graph,
the Initiator send the CONNECT_REQ to the Advertiser through Ch.38 which is used to send ADV_IND.
it is something like that the Initiator knows which the advertising channel is used.
https://microchipdeveloper.com/wireless:ble-link-layer-connections
Can Scanner know the advertising channel?
The scanner of course knows which advertising channel is being used. It's just that it's not part of the Bluetooth Specification to expose this information to an application using the Bluetooth stack. In particular, the HCI events for advertisements do not contain such a field. It is possible though that some embedded devices can expose this info to the application, if they have defined a custom API for this.
I am building a system to monitor a solar panel system using an arduino. The arduino is to interact with the user through SMS directly without needing internet.
However, I also want to allow the arduino to send data through sms to my application containing which it will read off the solar panel system. The idea is to allow the web app to receive data from the arduino without the arduino being connected to the internet. I would like to use Twilio SMSing service to achieve this whether any international number from African countries for e.g. will successfully be able to send SMSs to the server.
My question is whether there could be problems regarding receiving smses from international countries (in Africa for e.g)
You should be able to receive SMS on a Twilio number from international locales (accounting for message enablement and carrier details).
If however you want to send SMS globally from a Twilio number, I suggest you follow these guidelines.
I am doing a project for sending bulk sms service.this is the concept
create a website . Through this website the user will enter all their details so that only registered user can use my service.I ll get a service plan from any of the service providers for sending unlimited messages.They ll give me a SIM card with a unique number like 54545.My android application interfaces with the gsm modem and sends out the messages from my machine.
now,i wanted to know what kind of modem i can use for my project.Is there any modem to send only bulk sms
You might be looking for a GSM/GPRS-Terminal like these. I have used one to send SMS after a application has finished processing data or if an error occured.