parasquid

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• Seeed XIAO BLE

  @parasquid started

  • 3 comments
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  @user143523 replied
• Seeed XIAO BLE

  in Other Boards • 7 months

  

  Just wanted to mention that Seeed Studio put an NRF52840 in the XIAO form factor:

  https://www.seeedstudio.com/Seeed-XIAO-B­LE-nRF52840-p-5201.html

  Would be a good stopgap until we finally get an official MDBT50Q breakout with Espruino programmed in, if only it's in stock :P

• Alternate source for the Bangle2 charging cable

  in Bangle.js • 7 months

  

  You can DIY a cable yourself with some pogo pins :) The one I did wasn't magnetic so I had to spend half an hour just pressing down on the pogo and the watch, but it shouldn't be that complicated to create a harness that can clamp down on both the watch and the pins.

• Bangle.js 2 now on KickStarter

  in News • 8 months

  

  That is sad indeed. I was hoping that the kickstarter would have surprised me with new puck and pixl boards with the nrf52840 but I guess that would have to wait until the next one (or when the actual chips are back in circulation)?

• No labels?

  in JavaScript • 8 months, 3 weeks

  

  I'm not sure what "platform" refers to. Maybe I'm misunderstanding, but are you asking about alternative firmware for the nrf52832 chips? There's arduino of course, and then there's adafruit's circuitpython. You can also work with the nordic sdk directly.

• Is bluetooth open source

  in Bangle.js • 9 months

  

  I was actually replying to @user134951 :D

  With regard to your question on comms with the internet, Gordon answered a similar question: http://forum.espruino.com/conversations/­309832/

• Is bluetooth open source

  in Bangle.js • 9 months

  

  You'd be surprised that even the computer you're using has an opaque, second "brain" that nobody except the manufacturer has any idea of what it's doing (maybe even tracking you?) https://en.wikipedia.org/wiki/Intel_Mana­gement_Engine

• Is bluetooth open source

  in Bangle.js • 9 months

  

  I would liken this to saying operating systems based on Linux are open source, except when you start adding binary blobs like nvidia or printer drivers.

  You can recompile Espruino to not use bluetooth (for example the stm32 ones don't have bluetooth) but the watch won't be as functional (e.g. no app store, no wireless comms).

  Nordic is the manufacturer of the microprocessor that powers the watch, and they also provide the bluetooth stack. Since they are the manufacturer, the Nordic provided bluetooth stack works best with the chip, similar to how nvidia drivers have better support than the nouveau reverse engineered drivers.

  Another tricky thing for opensource products working with wireless comms would be compliance. If you use the Nordic sdk, you can mention that in your product docs and the certification officials would know what to do (since a lot of products with the Nordic chips would usually use the sdk and they would have experience with it). If you don't, you're in for a more grueling (and possibly more expensive) certification process since you'll need to ensure your wireless energy signals don't go beyond what local laws require. Since Espruino can be used in consumer products (the only one that comes to mind right now is https://lab.ruuvi.com/espruino/ ) the product manufacturers benefit from this as well.

• WebIDE locks up while loading require("neopixel") on Nordic nRF52840 Dongle

  in Porting to new Devices • 9 months, 2 weeks

  

  The neopixels require fast pulses, and the usual way firmware for microcontrollers do it is to ride on I2S (instead of bitbanging gpio).

  I2S usually need both SCK and LRCK defined, but the nRF52832 didn't need the LRCK pin defined. However after some testing (and a trip to the nordic forums) it seems it is indeed required.

  What I meant by not accidentally using it is that since with nRF52 you can assign devices their pins, if you put LRCK it on an exposed pin, you might accidentally connect it to your circuit and have a really awful time debugging :P

• WebIDE locks up while loading require("neopixel") on Nordic nRF52840 Dongle

  in Porting to new Devices • 9 months, 2 weeks

  

  In this case, http://forum.espruino.com/comments/15562­682/ and building the hex file with this board def works for me

  Edit: just saw that fanoush mentioned it's not a good idea. I guess you can just pick any pin that's free (for the dongle, maybe one that's on a pad underneath so you don't accidentally use it?)