Lup Yuen Lee 李立源 @lupyuen@qoto.org

IKEA Air Quality Sensor exposes a UART Port ... Let's sniff it with Bus Pirate

https://github.com/lupyuen/ikea-air-quality-sensor#test-with-bus-pirate

Let's connect IKEA Air Quality Sensor to #LoRaWAN and #TheThingsNetwork ... With Apache #NuttX OS and PineDio Stack #BL604!

https://github.com/lupyuen/ikea-air-quality-sensor

IKEA Air Quality Sensor has the same size as a Breadboard 🤔

https://style.oversubstance.net/2021/08/diy-use-an-ikea-vindriktning-air-quality-sensor-in-home-assistant-with-esphome/

Wished IKEA didn't put the pads so close to the surface mounted components ... But we're all done soldering the UART Port! 🎉

https://style.oversubstance.net/2021/08/diy-use-an-ikea-vindriktning-air-quality-sensor-in-home-assistant-with-esphome/

Pardon my horrid soldering 🙏 ... It tested OK with a multimeter 🎉

https://style.oversubstance.net/2021/08/diy-use-an-ikea-vindriktning-air-quality-sensor-in-home-assistant-with-esphome/

Let's mask out with Sticky Tape ... All the parts that should NOT be soldered 🙏

https://style.oversubstance.net/2021/08/diy-use-an-ikea-vindriktning-air-quality-sensor-in-home-assistant-with-esphome/

Can I solder the UART Port with my fat old fingers 🤔

https://style.oversubstance.net/2021/08/diy-use-an-ikea-vindriktning-air-quality-sensor-in-home-assistant-with-esphome/

A little smoky here because of the Lunar New Year festivities

Air Quality is not so great around here

https://style.oversubstance.net/2021/08/diy-use-an-ikea-vindriktning-air-quality-sensor-in-home-assistant-with-esphome/

IKEA Air Quality Sensor ... Surprisingly small

https://style.oversubstance.net/2021/08/diy-use-an-ikea-vindriktning-air-quality-sensor-in-home-assistant-with-esphome/

13 km (8 mile) trek to IKEA 😲

Found the IKEA Air Quality Sensor

https://style.oversubstance.net/2021/08/diy-use-an-ikea-vindriktning-air-quality-sensor-in-home-assistant-with-esphome/

IKEA Sensors

IKEA on the horizon

Now we know everything about #BL602 EFlash Loader ... Thanks to #Ghidra!

https://lupyuen.github.io/articles/loader?19#how-the-train-goes

Here's how #BL602 EFlash Loader writes to Embedded Flash

https://lupyuen.github.io/articles/loader?18#flash-program

Out of 24 Flashing Commands supported by #BL602 EFlash Loader ... Only 5 are used when flashing firmware

https://lupyuen.github.io/articles/loader?17#match-flashing-states-and-commands

#BL602 Firmware Flasher runs a State Machine that talks to EFlash Loader

https://lupyuen.github.io/articles/loader?16#flashing-states

Here are all 24 Flashing Commands supported by #BL602 EFlash Loader ... 17 of them are undocumented 🤔

https://lupyuen.github.io/articles/loader?15#list-of-flashing-commands

#Ghidra reveals every Flashing Command supported by #BL602 EFlash Loader ... Very nice! 👍

https://lupyuen.github.io/articles/loader?12#decipher-flashing-commands