Lup Yuen Lee 李立源 @lupyuen@qoto.org

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Oops Mynewt's #LoRaWAN Carrier Sensing implementation is outdated ...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

#BL602 tries to join the #LoRaWAN Network ... But no Join Request gets transmitted to WisGate 🤔

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

These are the #BL602 #LoRaWAN Commands ... Ported from Apache Mynewt OS

https://github.com/lupyuen/bl_iot_sdk/blob/lorawan/customer_app/sdk_app_lorawan/sdk_app_lorawan/demo.c#L306-L338

"Where can I find #Embedded C / C++ drivers?"

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

Setting expectations for #OpenSource participation (2018)

https://snarky.ca/setting-expectations-for-open-source-participation/

#PinePhone Keyboard to make for a cheaper, albeit slower Cosmo Communicator

https://www.cnx-software.com/2021/04/26/pinephone-keyboard-to-make-for-a-cheaper-albeit-slower-cosmo-communicator/

Analysis: China digital currency trials show threat to Alipay, WeChat duopoly

https://www.reuters.com/technology/analysis-china-digital-currency-trials-show-threat-alipay-wechat-duopoly-2021-04-26/

Play retro video games on #Linux with ScummVM

https://opensource.com/article/21/4/scummvm-retro-gaming

Will #PineCone #BL602 @PINE64 (with Pine64 RFM90 LoRa Module) ... Talk to RAKwireless #WisGate #LoRaWAN Gateway? Let's find out!

https://github.com/lupyuen/bl_iot_sdk/tree/lorawan/components/3rdparty/lorawan