Espruino JavaScript
NRF51822 Generic iBeacon #7532
Replies: 1 comment
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Posted at 2018-05-17 by @gfwilliams
Yes, absolutely. There's an image for Realistically the best way to program these is to use an nRF52832DK board and then connect GND, SWD and SWCLK. The DK is £30 or so so does put a bit of a dent in the cost savings of a cheap beacon though :) If you're interested it is possible to flash Espruino onto cheap fitness trackers as well: http://forum.espruino.com/conversations/280747/ However there's a whole new breed of nRF52 trackers and beacons out there that I'd recommend. You get 4x more RAM which really helps (because of fixed overheads that actually means 10x more JS code space). Posted at 2018-05-17 by OpenSourceTeacher That's great news! I'll look for a beacon based on the nrf52 and see if I can't get it to work as well. Would this cheap-o programmer work? That would keep costs much lower. Thanks for your help! Posted at 2018-05-17 by @gfwilliams
Maybe? It doesn't list Nordic as one of the chips it supports though :) Posted at 2018-06-29 by ConorONeill I had Espruino running on that device a few months back using the micro:bit image. It gave errors about I2C in the console but otherwise worked fine. Tiny memory tho, so a lot of examples don't work. I programmed it with this cheapo SWD dongle: https://www.ebay.ie/itm/Brand-New-J-Link-OB-ARM-Debugger-Programmer-Downloader-replace-V8-SWD-M74-MO/152480021834?hash=item2380847d4a:g:neoAAOSwOgdY0L8m Posted at 2018-06-29 by OpenSourceTeacher What software did you use with that programmer? The limited memory shouldn't be a problem for me, I'm not planning on doing anything extreme. Posted at 2018-06-30 by ConorONeill I used the free version of Segger J-Flash. It complains about the dongle being faulty but still works. Posted at 2021-03-01 by Mik 3 years later.... I have a dozen nrf51-based tags. Is NRF51TAG still supported. I don't see it in boards dir. I tried using: Posted at 2021-03-02 by @gfwilliams Try the UNMAINTAINED_BOARDS branch? Posted at 2021-03-02 by Mik Thanks Gordon. Posted at 2021-03-02 by @MaBecker check this link NRF51TAG.py Posted at 2021-03-04 by @gfwilliams Yes, it's SDK12 I believe. You don't get a bunch of code space on the 16k parts, but 32k should be reasonably usable Posted at 2021-03-04 by @fanoush
In case the space is tight it should be possible to remove GRAPHICS from there as it may not be that much useful on beacon/tag? Also there are 16 pages reserved for bootloader. If flashing via SWD is possible, removing that from line 55 and 58 could give more space for code or storage. |
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Posted at 2018-05-17 by OpenSourceTeacher
I picked up a cheap generic iBeacon that uses the nrf51822. You can see a listing on Ali Express at https://www.aliexpress.com/item/2V-3-3V-NRF51822-Bluetooth-4-0-Wireless-Module-For-iBeacon-Base-Station-Intelligent-Control-System/32824004498.html
Since it's running on the same chip as the micro:bit, is it safe to assume that if I were to get a programmer and connect it, I could potentially run espruino on this thing? I looked on the forums, and it appears that no one has brought this up before, or my search skills are lacking.
If so, that would be incredible, but I have no idea where to start. I've already mangled this beacon a bit, so if I damage it in the process, it'll be no big loss.
I'm already started on integrating my puck into my home automation system, which will perform context-aware actions based on what room it's in when the button is pressed (and potentially more complex actions based on sensor data). If it can be ported to run on this cheap a device, I can imagine having a set of various beacons attached to devices that would trigger specific actions in certain places (like a beacon that turns on the lights in whatever room you're in when you press it, or a beacon that controls my music system and sets it to the room I'm in).
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