Notes on Android engineering, payments and building a career in tech, by Rishabh Dhiman.https://rishabhdhiman.com/en-inhttps://rishabhdhiman.com/writing/dukpt-for-android-developers/https://rishabhdhiman.com/writing/dukpt-for-android-developers/A plain-English primer on DUKPT, BDKs and key serial numbers for Android developers moving into POS and card payments, from an engineer who worked on Paytm’s POS app.Sat, 07 Nov 2026 00:00:00 GMTpaymentsandroidsecurityrishabhdhiman12345@gmail.com (Rishabh Dhiman)https://rishabhdhiman.com/writing/android-phone-drone-remote-multiwii-nrf24l01/https://rishabhdhiman.com/writing/android-phone-drone-remote-multiwii-nrf24l01/How my open-source side project sends throttle, yaw, pitch and roll from an Android app over USB and a 2.4 GHz NRF24L01 link to a MultiWii flight controller.Sat, 07 Nov 2026 00:00:00 GMTside projectandroidhardwarerishabhdhiman12345@gmail.com (Rishabh Dhiman)