Lup Yuen Lee 李立源 @lupyuen@qoto.org

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

Yep #BL602 talks OK to #LoRa SX1276 over SPI ... SX1276 register values look correct ... Now let's transmit a LoRa Message!

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

Let's test whether #BL602 can talk to #LoRa SX1276 over SPI ... By dumping some SX1276 registers

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

#PineCone #BL602 nearly out of pins (and colours) for #LoRa SX1276 ... Let's use these pins for now

https://github.com/lupyuen/bl_iot_sdk/blob/lora/customer_app/sdk_app_lora/sdk_app_lora/sx1276.h#L24-L54

#Bitcoin mining to be halted in Chinese province amid energy-saving push

https://www.scmp.com/economy/china-economy/article/3123633/bitcoin-mining-northern-chinese-province-be-halted-amid

Bluetooth LE to WiFi Bridge

https://www.tindie.com/products/aprbrother/ab-ble-gateway-4-ble-to-wifi-bridge/

M1 Mac write issue: What's going on with Apple's SSDs?

https://www.zdnet.com/article/the-m1-mac-write-issue/