Hacker News new | ask | show | jobs
by lionpixel 957 days ago
For $9.90 you get a Seeed Xiao NRF52840[1] board with Arduino support. In sleep mode it consumes just 1µA. In my spare time I'm building smart locks with these that last for up to 2 years with a CR123 battery. Recently I switched from Arduino to the nrf Connect SDK and a tiny nrf52832 board that cost just 4$ on AliExpress. Works like a charm.

[1] https://www.seeedstudio.com/Seeed-XIAO-BLE-nRF52840-p-5201.h...
1 comments
fullstop 957 days ago
Yeah, Nordic crushes it right now with their sleep mode. Espressif is making progress in that area, though, but they have a lot of ground to make up.

Out of curiosity, how do you flash the nrf52832 board?

link
lionpixel 957 days ago
With SWD and a Tag-Connect connector[1]. I watched someone on youtube recommend it due to the small space and low profile. You can use the VSCode NRF Connect SDK plugin (coupled with Jlink or NRF52 dev kit) to flash the device. But of course you can just use USB und copy a generated .hex file directly on the device. I use SWD because its faster to flash many boards by just pressing the pogo pins on the connector pad. Boom done. :)

[1] https://www.tag-connect.com/product/tc2030-ctx-nl-6-pin-no-l...

link