Lup Yuen Lee 李立源 @lupyuen@qoto.org

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

#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

NimBLE Porting Layer is a portable library of Multithreading Functions ... We've used it for #LoRa on Linux and FreeRTOS ... Now we call it from Apache #NuttX OS

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

Our #NuttX App was waiting for the #LoRaWAN Join Request to be transmitted before receiving the Join Response ... But because we're polling SX1262, we missed the Join Response ... Let's fix this with the multithreading functions from NimBLE Porting Layer

Log: https://gist.github.com/lupyuen/d3d9db37a40d7560fc211408db04a81b

#NuttX OS doesn't handle the Join Response from #LoRaWAN Gateway ... Let's fix this

Run Log: https://gist.github.com/lupyuen/a8e834e7b4267345f01b6629fb7f5e33

#LoRaWAN Gateway receives the Join Request from #NuttX OS ... And accepts the Join Request! 🎉

Run Log: https://gist.github.com/lupyuen/a8e834e7b4267345f01b6629fb7f5e33

Let's connect Apache #NuttX OS to a #LoRaWAN Gateway ... RAKwireless WisGate D4H with ChirpStack

https://lupyuen.github.io/articles/wisgate

For #NuttX OS we hardcode the #LoRaWAN App Key ... Into the "Soft" Secure Element

https://github.com/lupyuen/LoRaMac-node-nuttx/blob/master/src/peripherals/soft-se/se-identity.h#L100-L115

#LoRaWAN gets its Device EUI, Join EUI and App Key from the Secure Element ... But since #NuttX doesn't have a Secure Element, we hardcode them in the "Soft" Secure Element

https://github.com/lupyuen/LoRaMac-node-nuttx/blob/master/src/peripherals/soft-se/se-identity.h#L65-L79

LoRa Frequency and Sync Word are OK ... Let's fix the Device EUI and Join EUI for #LoRaWAN on #NuttX OS

Run Log: https://gist.github.com/lupyuen/b91c1f88645eedb813cfffa2bdf7d7a0

#LoRaWAN on #NuttX OS sends a Join Request to the LoRaWAN Gateway ... But the values are incorrect though 🤔

Run Log: https://gist.github.com/lupyuen/b91c1f88645eedb813cfffa2bdf7d7a0

#LoRaWAN builds OK on #NuttX OS! 🎉 ... Will it run? 🤔

https://github.com/lupyuen/incubator-nuttx/tree/lorawan

https://github.com/lupyuen/incubator-nuttx-apps/tree/lorawan

#LoRaWAN on #NuttX OS: Let's stub out the functions for Non-Volatile Memory and Real Time Clock ... And watch what happens 🌋

https://github.com/lupyuen/LoRaMac-node-nuttx/blob/master/src/nuttx.c

Fixing the missing references for #LoRaWAN on Apache #NuttX OS

https://docs.google.com/spreadsheets/d/12EFS72JFjjuK-2yWQVYrImkUjyEA_iGlnsEu1d42r68/edit#gid=0

Dizzy 😵‍💫

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