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

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

Simple fix for a PlatformIO build error in #WisBlock's LoRaP2P_TX sample ... My first Pull Request for WisBlock!

https://github.com/RAKWireless/WisBlock/pull/10

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

#BL602 GPIO Interrupt ... According to the BL602 Reference Manual 🤔

https://github.com/bouffalolab/bl_docs/tree/main/BL602_RM/en

#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

Maybe #BL602 High Level Trigger Interrupt = High Priority Interrupt = Sync Interrupt? 🤔 ... Lemme check the original Chinese Reference Manual

https://github.com/bouffalolab/bl_docs/tree/main/BL602_RM/en

My bad ... #BL602 High Level Trigger Interrupt = 高电平触发中断 = Trigger Interrupt on Logic High ... Nothing to do with priority 🤔

https://github.com/bouffalolab/bl_docs/tree/main/BL602_RM/zh_CN

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

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

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

https://youtu.be/USqStub3KC0

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

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

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

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

#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

#BL602 GPIO Interrupt triggered OK when #LoRa Packet received yay! ... But why does it work now? 🤔

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

#BL602 GPIO Interrupts hanging could be due to the way we handle multiple GPIO Interrupts ... Let's revisit this when we can trigger multiple GPIO Interrupts from #LoRa SX1276

https://github.com/lupyuen/bl_iot_sdk/blob/lorarecv/customer_app/sdk_app_lora/sdk_app_lora/sx1276-board.c#L145-L196