Lup Yuen Lee 李立源 @lupyuen@qoto.org

$1.8 XT-ZB1 Zigbee & BLE devkit features BL702 #RISCV module

https://www.cnx-software.com/2021/12/27/xt-zb1-zigbee-ble-devkit-bl702-risc-v-module/

We enable the Entropy Pool in #NuttX OS ... To generate Strong Random Numbers for our #LoRaWAN Nonce

#LoRaWAN gets the Nonce from the Secure Element's Random Number Generator ... Let's simulate the Secure Element on Apache #NuttX OS

https://github.com/lupyuen/LoRaMac-node-nuttx/blob/master/src/mac/LoRaMacCrypto.c#L980-L996

Our #NuttX App resends the same Nonce to the #LoRaWAN Gateway ... Which (silently) rejects the Join Request due to Duplicate Nonce ... Let's fix our Random Number Generator

https://gist.github.com/lupyuen/b38434c3d27500444382bb4a066691e5

Our #NuttX Background Thread handles the GPIO Interrupts (SX1262 DIO1) ... By adding to the #LoRaWAN Event Queue

https://github.com/lupyuen/lora-sx1262/blob/lorawan/src/sx126x-nuttx.c#L863-L892

We handle GPIO Interrupts (SX1262 DIO1) in a #NuttX Background Thread ... Awaiting the Signal for GPIO Interrupt

https://github.com/lupyuen/lora-sx1262/blob/lorawan/src/sx126x-nuttx.c#L835-L861

SX1262 will trigger a GPIO Interrupt on #NuttX OS when it receives a #LoRa Packet ... We wait for the GPIO Interrupt to be Signalled in a Background Thread

https://github.com/lupyuen/lora-sx1262/blob/lorawan/src/sx126x-nuttx.c#L742-L778

Here's how we check the SX1262 Busy Pin on #NuttX OS ... By reading the GPIO Input

https://github.com/lupyuen/lora-sx1262/blob/lorawan/src/sx126x-nuttx.c#L184-L199

Here's our #LoRaWAN Event Loop for #NuttX OS ... Implemented with NimBLE Porting Library ... No more polling!

https://github.com/lupyuen/incubator-nuttx-apps/blob/lorawan/examples/lorawan_test/lorawan_test_main.c#L814-L857

#LoRaWAN runs neater on Apache #NuttX OS ... After implementing Timers and Multithreading with NimBLE Porting Layer ... No more polling and sleep()!

https://gist.github.com/lupyuen/cad58115be4cabe8a8a49c0e498f1c95

@niclas Yeah Zigbee is more for Home Automation

Have a Great Boxing Sunday🥊

https://learningenglish.voanews.com/a/boxing-day-and-box-expressions/6363983.html

"LG’s 16:18 Ultra-Tall Monitor means less scrolling"

https://arstechnica.com/gadgets/2021/12/lgs-1618-ultra-tall-monitor-means-less-scrolling/

"Future of the Semiconductor industry / reliance on China?"

https://www.reddit.com/r/embedded/comments/ro8i4n/future_of_the_semiconductor_industry_reliance_on/?utm_medium=android_app&utm_source=share

"#PinePhone Pro preorder?"

https://www.reddit.com/r/PINE64official/comments/ro797l/pinephone_pro_for_newcomers/?utm_medium=android_app&utm_source=share

#BL702 Dev Board with Zigbee

https://m.aliexpress.com/item/1005003695882418.html

To build NumBLE Porting Layer on #NuttX OS we need to enable: 1️⃣ POSIX Timers & Message Queues 2️⃣ Clock Monotonic 3️⃣ Work Queues 4️⃣ SIGEV_THHREAD

https://github.com/lupyuen/nimble-porting-nuttx