Lup Yuen Lee 李立源 @lupyuen@qoto.org

Indian Rojak ... Comfort Food for Moody Days

https://cnalifestyle.channelnewsasia.com/dining/best-local-food-singapore-rojak-chinese-indian-13074250

Here's how we init the #LoRa Driver for #BL602

https://lupyuen.github.io/articles/lora#initialise-lora-transceiver

#LoRa "Fire And Forget" ... The simplest way to connect #RISCV #BL602 to LoRa ... Get your LoRa Breakout Board from Tindie Marketplace!

https://lupyuen.github.io/articles/lora#connect-bl602-to-lora-transceiver

Here's how we connect #LoRa SX1276 to #PineCone #BL602 @PINE64 over SPI

https://lupyuen.github.io/articles/lora#connect-bl602-to-lora-transceiver

How would we use a #LoRa Transceiver and #PineCone #BL602 @PINE64 ... To create a low cost, low power #IoT Gadget?

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

Here's why #LoRa is perfect for low-power #BL602 #IoT Gadgets

https://lupyuen.github.io/articles/lora#visualise-lora-with-software-defined-radio

Connect #PineCone #BL602 @PINE64 to #LoRa #IoT Transceiver ... All shall be explained here

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

Sending #LoRa Packets from #PineCone #BL602 @PINE64 ? Connect these 5 data pins to Semtech SX1276 or Hope RF96

https://github.com/lupyuen/bl_iot_sdk/blob/lora/customer_app/sdk_app_lora/sdk_app_lora/sx1276.h#L24-L56

#BL602 #LoRa Chirp ... One last shot

https://pubs.gnuradio.org/index.php/grcon/article/download/8/7/

Someone captured this #LoRa Chirp with HackRF One SDR ... Isn't this beautiful?

https://www.linkedin.com/feed/update/urn:li:activity:6772707414933430272?commentUrn=urn%3Ali%3Acomment%3A%28activity%3A6772707414933430272%2C6772744850791124992%29

Captured the Legendary #LoRa Chirp! (The helix thingy)

https://pubs.gnuradio.org/index.php/grcon/article/download/8/7/

1️⃣ Enable #LoRa SX1276 Power Amplifier 2️⃣ Increase Airspy sample rate to 10 MHz ... LoRa Packets never looked better!

https://github.com/lupyuen/bl_iot_sdk/commit/ae7e11a87f58ef63fea9b5c158aa66f3e81c145e#diff-6d25e21aa14e973456e3eb35c4298a576f14a5296ae392544e1ca61d8e463ed4

Let's zoom into the #BL602 #LoRa Packet ... And hunt for the LoRa Chirp!

https://pubs.gnuradio.org/index.php/grcon/article/download/8/7/

CubicSDR software works better with Airspy ... Here's the #BL602 #LoRa Packet (64 bytes) centered at 923 MHz with bandwidth 125 kHz

https://cubicsdr.com/

Nope Airspy SDR couldn't sniff our #BL602 #LoRa at 923 MHz ... Though it sniffed others thru the Faraday Cage (erm) Pot 🤔

https://github.com/lupyuen/bl_iot_sdk/blob/lora/customer_app/sdk_app_lora/sdk_app_lora/demo.c#L220-L270

#BL602 + #LoRa SX1276 + Airspy SDR ... Inside an improvised Faraday Cage 🫕 ... It really works!

But today we shall spy on #BL602 + #LoRa ... With an #Airspy R2 Software Defined Radio 📻

Someday we shall pack #PineCone #BL602 @ThePine64 with #LoRa ... Into this cute clear Junction Box

#BL602 sends a #LoRa message ... By copying the message to SX1276 Transmit FIFO over SPI ... Was the message actually transmitted? Airspy will tell!

https://github.com/lupyuen/bl_iot_sdk/blob/lora/customer_app/sdk_app_lora/sdk_app_lora/demo.c#L107-L124

#BL602 inits the #LoRa SX1276 Driver ... By writing a bunch of SX1276 Registers over SPI ... So far so good!

https://github.com/lupyuen/bl_iot_sdk/blob/lora/customer_app/sdk_app_lora/sdk_app_lora/demo.c#L220-L270