Lup Yuen Lee 李立源 @lupyuen@social.cleverlibre.org

What's an Mbuf? Why is it used by our #BL602 #LoRaWAN Driver? Mbufs are Chains of Fixed-Size Blocks ... Works great with little RAM (no fragmentation) ... Created for BSD Unix in 1983!

https://mynewt.apache.org/latest/os/core_os/mbuf/mbuf.html

Uh-oh our #BL602 #LoRaWAN Driver (from Mynewt) passes LoRaWAN Packets in Mbuf Format ... Let's find something equivalent on BL602 🤔

https://github.com/lupyuen/bl_iot_sdk/blob/lorawan/components/3rdparty/lorawan/src/lora_app.c#L260-L303

Curiously, our #BL602 #LoRaWAN Driver includes a Command-Line Interface (bottom) that Transmits and Receives LoRa Packets ... Directly calling the SX1276 Driver 🤔

https://github.com/lupyuen/bl_iot_sdk/blob/lorawan/components/3rdparty/lorawan/src/lora_cli.c

500 million #LinkedIn users' data is for sale on a hacker site

https://www.cnn.com/2021/04/08/tech/linkedin-data-scraped-hacker-site/index.html

How shall we implement the #BL602 #LoRaWAN Event Queue for the Medium Access Control Layer? With the NimBLE Porting Layer of course!

https://lupyuen.github.io/articles/lora2#multitask-with-nimble-porting-layer

The #LoRaWAN Protocol is explained in this thread: Encryption, Receive Window, Duty Cycle, ...

https://qoto.org/@lupyuen/105874847933603494

The Medium Access Control Layer (right) of our #BL602 #LoRaWAN Driver implements the LoRaWAN Protocol: Encryption, Receive Window, Duty Cycle, ... It exposes the MCPS Messaging Interface (IEEE 802.15.4) to the Node Layer (centre) via an Event Queue

https://github.com/lupyuen/bl_iot_sdk/blob/lorawan/components/3rdparty/lorawan/src/mac/LoRaMac.c

The Dalai Lama ... On Anger and Hatred

https://en.m.wikipedia.org/wiki/The_Art_of_Happiness

Semtech #LoRaWAN Stack is structured according to IEEE 802.15.4 ... Yep LoRaWAN shares the same legacy as Thread, Zigbee and 6LoWPAN! We shall port this #IoT Legacy to #BL602

https://en.wikipedia.org/wiki/IEEE_802.15.4

What's MCPS in the #BL602 #LoRaWAN Driver? ... That's the "MAC Common Part Sublayer", which is defined in the Semtech LoRaWAN Stack

https://stackforce.github.io/LoRaMac-doc/LoRaMac-doc-v4.4.7/index.html

The Node Layer (centre) in our #BL602 #LoRaWAN Driver handles the networking operations for our BL602 LoRaWAN Node ... It's called by the Application Layer (left)

https://github.com/lupyuen/bl_iot_sdk/blob/lorawan/components/3rdparty/lorawan/src/lora_node.c

"FlixOnline": New wormable #Android #malware poses as Netflix to hijack #WhatsApp sessions

https://www.zdnet.com/article/new-android-malware-poses-as-netflix-to-hijack-whatsapp-sessions/

For #Arduino Fans: RAKwireless has a #WisBlock #LoRaWAN Tutorial ... We shall try this later

https://github.com/RAKWireless/WisBlock/tree/master/examples/communications/LoRa/LoRaWAN

Decline of #Heroku

https://www.infoworld.com/article/3614210/the-decline-of-heroku.html

#Mynewt OS has a #LoRaWAN Command-Line App that calls the Application Layer of the LoRaWAN Driver ... We shall port this app to #BL602 too
https://mynewt.apache.org/latest/tutorials/lora/lorawanapp.html

The Application Layer (left) of our #BL602 #LoRaWAN Driver exposes LoRaWAN Functions to Application Firmware ... Join Network, Open/Close Port, Transmit/Receive Packets

https://github.com/lupyuen/bl_iot_sdk/blob/lorawan/components/3rdparty/lorawan/src/lora_app.c

#RISCV Star Rises Among Chip Developers Worldwide

https://spectrum.ieee.org/tech-talk/semiconductors/design/riscv-rises-among-chip-developers-worldwide

Our #BL602 #LoRaWAN Driver has many Layers (like Shrek) ... Let's peel the Shrek ... (erm) Layers 🧅

https://github.com/lupyuen/bl_iot_sdk/tree/lorawan/components/3rdparty/lorawan

Benefits of Learning #Haskell

https://alistairb.dev/benefits-of-learning-haskell/

How a #VPN vulnerability allowed #ransomware to disrupt two manufacturing plants

https://arstechnica.com/information-technology/2021/04/ransomware-shuts-down-production-at-two-manufacturing-plants/