Lup Yuen Lee 李立源 @lupyuen@qoto.org

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

"Testing #LoRa with #SDR and some handy tools"

https://penthertz.com/blog/testing-LoRa-with-SDR-and-handy-tools.html

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

#YouTube Protocol for #Samsung TV

https://0x41.cf/automation/2021/03/02/google-assistant-youtube-smart-tvs.html

The State of Enterprise #OpenSource: A Red Hat report

https://www.redhat.com/en/resources/state-of-enterprise-open-source-report-2021

"Why are #STM32 MCUs so popular?"

https://www.reddit.com/r/embedded/comments/lvy5ax/why_are_stm32s_so_popular/?utm_medium=android_app&utm_source=share

#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

"My New #PineTime Development Setup With Current Measurement"

https://infinitime.io/blog/2021-03/my-new-pinetime-development-setup-with-current-measurement/

Can we say no to the cameras? 🤔

https://www.zdnet.com/article/singapore-eyes-more-cameras-technology-to-boost-law-enforcement/

923 MHz on a quiet Singapore night ... Captured by #Gqrx and #Airspy R2 Software Defined Radio 📻

https://youtu.be/RJIRTz2zUok

How will we know if our #BL602 + #LoRa SX1276 are misbehavin’ on the airwaves? We got a spy ... An AirSpy Software Defined Radio

https://airspy.com/airspy-r2

Our #LoRa SX1276 (actually RF96) is factory configured for 434 MHz, sez the Frequency Registers ... #BL602 will tune it to 923 MHz for Singapore

https://github.com/lupyuen/bl_iot_sdk/blob/lora/customer_app/sdk_app_lora/sdk_app_lora/demo.c#L199-L213

#BL602 #SPI Unsolved Mystery ... BL602 must be configured for SPI Phase 1 to talk to #LoRa SX1276 ... But SX1276 actually uses SPI Phase 0! 🤔

https://github.com/lupyuen/bl_iot_sdk/blob/lora/customer_app/sdk_app_lora/sdk_app_lora/sx1276-board.c#L112-L137