Lup Yuen Lee 李立源 @lupyuen@qoto.org

#PineCone #BL602 Blue LED switches off ... When #WisBlock transmits a #LoRa Packet ... So DIO0 Packet Received works! Why does the GPIO Interrupt hang? 🤔

https://github.com/lupyuen/bl_iot_sdk/tree/lorarecv/customer_app/sdk_app_lora

Something spooky about #BL602 GPIO Interrupts 🤔 ... Let's disconnect #LoRa SX1276 pins DIO1 to DIO3 ... And connect DIO0 to my fav Blue LED (GPIO 11)

https://github.com/lupyuen/bl_iot_sdk/blob/lorarecv/customer_app/sdk_app_lora

And #BL602 still hangs when #WisBlock transmits #LoRa Packets ... Chaos Magic 🤔

Maybe #BL602 is stuck forever handling #LoRa Packet Received Interrupts? 🤔 ... Let's suppress GPIO Interrupts after handling the first 5 interrupts

https://github.com/lupyuen/bl_iot_sdk/blob/lorarecv/customer_app/sdk_app_lora/sdk_app_lora/sx1276-board.c#L402-L438

When #WisBlock transmits #LoRa Packets ... Our #BL602 LoRa Receiver hangs! ... Let's find out why 🤔

https://github.com/lupyuen/bl_iot_sdk/blob/lorarecv/customer_app/sdk_app_lora/sdk_app_lora/demo.c

#WisBlock #LoRa Transmitter ... Sniffed by Airspy R2 SDR ... Watch the distinctive LoRa Chirp (red spike)

https://youtu.be/USqStub3KC0

Interesting suggestion for upcoming #LoRa Devices by @PINE64 ... Should they run on Named Data Networking (NDN) over LoRa ... Instead of LoRaWAN? 🤔

https://github.com/named-data/NDN-packet-spec/issues/4

Flashed the #LoRa Transmitter to @RAKwireless #WisBlock ... This Arduino program transmits "Hello" in a LoRa Packet every 5 seconds

https://github.com/lupyuen/wisblock-lora-transmitter/blob/main/src/main.cpp#L94-L128

Let's test whether #LoRa SX1276 triggers GPIO Interrupts correctly on #BL602 ... When it receives a LoRa Packet ... The Interrupt Counters shall tell us

https://github.com/lupyuen/bl_iot_sdk/blob/lorarecv/customer_app/sdk_app_lora/sdk_app_lora/sx1276-board.c#L399-L428

#BL602 GPIO Interrupts: Should we use Sync or Async Interrupts for #LoRa? 🤔 ... BL602 IoT SDK uses Async Interrupts to handle GPIO Buttons ... Let's do the same for LoRa

https://github.com/bouffalolab/bl_iot_sdk/blob/master/components/hal_drv/bl602_hal/hal_button.c#L270-L317

How we configure a GPIO Interrupt on #BL602 ... For receiving #LoRa Packets

https://github.com/lupyuen/bl_iot_sdk/blob/lorarecv/customer_app/sdk_app_lora/sdk_app_lora/sx1276-board.c#L304-L340

Wiring looks too sus among us 🤔 ... #PineCone #BL602 @PINE64 connected to #LoRa Hope RF96 ... Including DIO0 to DIO3

https://github.com/lupyuen/bl_iot_sdk/blob/lorarecv/customer_app/sdk_app_lora/sdk_app_lora/sx1276.h#L24-L60

"LMAC: Efficient CSMA for #LoRa" ... By NTU Singapore

https://wands.sg/lmac/index.html

To receive #LoRa Packets on #BL602: We listen for GPIO Interrupts on SX1276 Pins DIO0 to DIO3 (4 pins) ... Yep we're nearly out of GPIO Pins 🤔

https://github.com/lupyuen/bl_iot_sdk/blob/lorarecv/customer_app/sdk_app_lora/sdk_app_lora/sx1276.h#L24-L60

Receiving #LoRa Packets on #BL602 gets tricky ... Because SX1276 triggers a GPIO Interrupt when a packet is received ... And the Interrupt Handler needs to forward the packet to the Application Task 🤔

https://github.com/lupyuen/bl_iot_sdk/blob/lorarecv/customer_app/sdk_app_lora/sdk_app_lora/sx1276-board.c#L304-L359

Let's use this #WisBlock sample app to transmit #LoRa Packets

https://github.com/RAKWireless/WisBlock/blob/master/examples/communications/LoRa/LoRaP2P/LoRaP2P_TX/LoRaP2P_TX.ino

Now we Transmit #LoRa Packets ... From RAKwireless #WisBlock ... To #PineCone #RISCV #BL602 @PINE64

https://lupyuen.github.io/articles/wisblock#whats-next

Creating a #LoRa app with #RAKwireless #WisBlock was incredibly pleasant! ... Here's how I used WisBlock to test a LoRa #IoT Sensor based on #PineCone #BL602 @PINE64

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

3 months ago: "#LoRa Alliance in talks with #Amazon to switch Sidewalk over to #LoRaWAN"

https://enterpriseiotinsights.com/20201208/channels/news/lora-alliance-semtech-in-talks-with-amazon-to-switch-sidewalk-over-to-lorawan

Heading back to #PineCone #BL602 to finish #LoRa Level 1 ... Stay tuned for be more RAKwireless #WisBlock! (Maybe #WisGate too 🤔)

https://lupyuen.github.io/articles/wisblock?31#whats-next