Lup Yuen Lee 李立源 @lupyuen@qoto.org

#BL602 vs #WisBlock: Join #LoRaWAN Network Request ... Let's check the Nonce and Message Integrity Code ... Wonder if we can retransmit the BL602 packet from WisBlock 🤔

https://github.com/lupyuen/bl_iot_sdk/tree/lorawan/customer_app/sdk_app_lorawan#output-log

#LoRaWAN Packet: #BL602 vs #WisBlock ... Seems BL602 is transmitting at Lower Power than WisBlock ... Let's check the Power Amplifier settings 🤔

https://github.com/lupyuen/bl_iot_sdk/tree/lorawan/customer_app/sdk_app_lorawan#output-log

Here are the #LoRaWAN Packets transmitted by RAKwireless #WisBlock ... Captured by Airspy SDR and CubicSDR

https://youtu.be/xdyi6XCo8Z8

#LoRaWAN "Join Network" Packet transmitted by #WisBlock ... Looks similar to the one transmitted by BL602 ... Nonce and Message Integrity Code will differ of course

https://github.com/lupyuen/wisblock-lorawan/blob/master/README.md#output-log

Here's the "Join Network" #LoRaWAN Packet transmitted by #BL602 ... Does this look right? 🤔 Let's compare with WisBlock

https://github.com/lupyuen/bl_iot_sdk/tree/lorawan/customer_app/sdk_app_lorawan#output-log

How to Build a Custom Test Harness in #RustLang

https://www.fluvio.io/blog/2021/04/rust-custom-test-harness/

Low Cost #LoRaWan Field Tester

https://www.disk91.com/2021/technology/lora/low-cost-lorawan-field-tester/

Here's the #BL602 "Join Network" #LoRa Chirp ... Recorded by Airspy SDR with CubicSDR

https://youtu.be/7a4rfaI_zV4

Airspy SDR verifies that #BL602 is indeed transmitting the Join #LoRaWAN Network packet ... Maybe it contains garbage 🤔

https://github.com/lupyuen/bl_iot_sdk/tree/lorawan/customer_app/sdk_app_lorawan#output-log

Sadly our #WisGate #LoRaWAN Gateway didn't receive any LoRaWAN Packets transmitted by #BL602 ... Let's look inside the transmitted packets ... And verify the transmission with Airspy SDR

https://github.com/lupyuen/bl_iot_sdk/tree/lorawan/customer_app/sdk_app_lorawan#output-log

#RAKwireless Closes $10M Series A Funding Round

https://www.prnewswire.com/news-releases/rakwireless-closes-10m-series-a-funding-round-301276301.html

#SiFive Intelligence X280 64-bit #RISCV processor integrates AI extensions

https://www.cnx-software.com/2021/04/27/sifive-intelligence-x280-64-bit-risc-v-processor-integrates-ai-extensions/

Let's move #PineCone #BL602 (and #Pinebook Pro @PINE64
) real close to RAKwireless #WisGate ... For our #LoRaWAN testing

https://github.com/lupyuen/bl_iot_sdk/tree/lorawan/customer_app/sdk_app_lorawan

#WisGate #ChirpStack you're so funny ... I'm nowhere near Chinese Garden, Japanese Garden and Jurong Bird Park 😂

https://docs.rakwireless.com/Product-Categories/WisGate/RAK7244C/Quickstart/#connect-the-gateway-with-chirpstack

#BL602 is now transmitting the #LoRaWAN Join Network Request ... But doesn't receive any response from our LoRaWAN Gateway (WisGate) ... Let's check the WisGate LoRaWAN Log

https://github.com/lupyuen/bl_iot_sdk/tree/lorawan/customer_app/sdk_app_lorawan#output-log

According to our RISC-V Disassembly, #BL602 #LoRaWAN Driver hits a Null Pointer Exception here ... Seems like non-essential logging code ... So let's disable this code

https://github.com/lupyuen/bl_iot_sdk/blob/lorawan/components/3rdparty/lorawan/src/mac/LoRaMac.c#L2379-L2415

After disabling #LoRaWAN Carrier Sensing ... #BL602 hits an Exception while transmitting the Join Network Request ... Let's lookup these addresses in the RISC-V Disassembly

https://github.com/lupyuen/bl_iot_sdk/tree/lorawan/customer_app/sdk_app_lorawan#output-log

Oops Mynewt's #LoRaWAN Carrier Sensing implementation is outdated ... Semtech's LoRaWAN Reference Implementation does NOT require Carrier Sensing outside Japan and South Korea ... So we disable Carrier Sensing and use a random LoRa Frequency Channel

https://github.com/lupyuen/bl_iot_sdk/blob/lorawan/components/3rdparty/lorawan/src/mac/region/RegionAS923.c#L977-L1041

When #BL602 hunts for the next #LoRa Frequency Channel to transmit (Spread Spectrum) ... It listens to the airwaves to check whether the channel is in use ... Let's find out whether BL602 is doing Carrier Sensing correctly 🤔

https://github.com/lupyuen/bl_iot_sdk/blob/lorawan/components/3rdparty/lorawan/src/mac/region/RegionAS923.c#L914-L982

#BL602 tries to send #LoRaWAN Join Network Request ... But hangs while hunting for the next LoRa Frequency Channel to transmit 🤔

https://github.com/lupyuen/bl_iot_sdk/blob/lorawan/components/3rdparty/lorawan/src/mac/region/RegionAS923.c#L914-L982