NRF52840 - Revision history

Bertrik Sikken: /* Hardware */

2026-02-01T16:26:09Z

Hardware

← Older revision		Revision as of 16:26, 1 February 2026
Line 31:		Line 31:

	== Hardware ==		== Hardware ==
	[[File:nrf52840-supermini-pinout.png\|right\|350px thumb stopped working :(]]		[[File:nrf52840-supermini-pinout.png\|right\|350px\| thumb stopped working :(]]

	The boards I have are the "promicro" and "supermini".		The boards I have are the "promicro" and "supermini".

Bertrik Sikken: try 'frame'

2026-02-01T16:25:53Z

try 'frame'

← Older revision		Revision as of 16:25, 1 February 2026
Line 31:		Line 31:

	== Hardware ==		== Hardware ==
	[[File:nrf52840-supermini-pinout.png~~\|frame~~\|right\|350px~~\|pinout~~]]		[[File:nrf52840-supermini-pinout.png\|right\|350px thumb stopped working :(]]

	The boards I have are the "promicro" and "supermini".		The boards I have are the "promicro" and "supermini".

Bertrik Sikken: try 'frame'

2026-02-01T16:24:08Z

try 'frame'

← Older revision		Revision as of 16:24, 1 February 2026
Line 31:		Line 31:

	== Hardware ==		== Hardware ==
	[[File:nrf52840-supermini-pinout.png\|right\|350px\|pinout]]		[[File:nrf52840-supermini-pinout.png\|frame\|right\|350px\|pinout]]

	The boards I have are the "promicro" and "supermini".		The boards I have are the "promicro" and "supermini".

Bertrik Sikken: more experimentation

2026-02-01T16:23:19Z

more experimentation

← Older revision		Revision as of 16:23, 1 February 2026
Line 31:		Line 31:

	== Hardware ==		== Hardware ==
	[[File:nrf52840-supermini-pinout.png\|right~~\|thumb~~\|350px\|pinout]]		[[File:nrf52840-supermini-pinout.png\|right\|350px\|pinout]]

	The boards I have are the "promicro" and "supermini".		The boards I have are the "promicro" and "supermini".

Bertrik Sikken: mediawiki fix attempt

2026-02-01T16:20:37Z

mediawiki fix attempt

← Older revision		Revision as of 16:20, 1 February 2026
Line 31:		Line 31:

	== Hardware ==		== Hardware ==
	[[File:nrf52840-supermini-pinout.png\|right\|thumb\|pinout]]		[[File:nrf52840-supermini-pinout.png\|right\|thumb\|350px\|pinout]]

	The boards I have are the "promicro" and "supermini".		The boards I have are the "promicro" and "supermini".

Bertrik Sikken at 16:13, 12 January 2026

2026-01-12T16:13:48Z

← Older revision		Revision as of 16:13, 12 January 2026
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	\|Name=NRF52840		\|Name=NRF52840
	\|Picture=nrf52840-supermini.png		\|Picture=nrf52840-supermini.png
	\|Omschrijving=~~Investigating~~ Arduino on ~~inexpensive~~ NRF52840 ~~boards~~		\|Omschrijving=Running Arduino with platformio on NRF52840
	\|Status=In progress		\|Status=In progress
	\|Contact=bertrik		\|Contact=bertrik

Bertrik Sikken at 20:46, 10 January 2026

2026-01-10T20:46:47Z

← Older revision		Revision as of 20:46, 10 January 2026
Line 1:		Line 1:
	{{Project		{{Project
	\|Name=NRF52840		\|Name=NRF52840
	\|Picture=~~nopicture~~.~~jpg~~		\|Picture=nrf52840-supermini.png
	\|Omschrijving=Investigating Arduino on inexpensive NRF52840 boards		\|Omschrijving=Investigating Arduino on inexpensive NRF52840 boards
	\|Status=In progress		\|Status=In progress

Bertrik Sikken: /* Intro */

2026-01-05T07:41:41Z

Intro

Bertrik Sikken: /* Hardware */

2026-01-02T21:24:38Z

Hardware

@@ Line 47: / Line 47: @@
 Pinout/schematic: https://nicekeyboards.com/docs/nice-nano/pinout-schematic
-=== promicro ===
+=== bootloader ===
 The INFO_UF2.TXT says (after double-tap reset):
    UF2 Bootloader 0.6.0 lib/nrfx (v2.0.0) lib/tinyusb (0.10.1-41-gdf0cda2d) lib/uf2 (remotes/origin/configupdate-9-gadbb8c7)
@@ Line 78: / Line 78: @@
 [509373.296933]  sdb:
 [509373.297002] sd 3:0:0:0: [sdb] Attached SCSI removable disk
 </pre>

Bertrik Sikken: /* Hardware */

2026-01-02T21:23:16Z

Hardware

← Older revision		Revision as of 21:23, 2 January 2026
Line 33:		Line 33:

	== Hardware ==		== Hardware ==
			[[File:nrf52840-supermini-pinout.png\|right\|thumb\|pinout]]

	The boards I have are the "promicro" and "supermini".		The boards I have are the "promicro" and "supermini".
	These boards look basically identical hardware-wise.		These boards look basically identical hardware-wise.

← Older revision		Revision as of 07:41, 5 January 2026
Line 10:		Line 10:
	This page is about getting inexpensive NRF52840 boards to work with Arduino and platformio.		This page is about getting inexpensive NRF52840 boards to work with Arduino and platformio.

	NRF52840 is ~~potentially~~ a ~~very~~ nice platform:		NRF52840 is a nice platform:
	* low-power~~. quick wake-up~~		* low-power
	* inexpensive		* inexpensive
	* decent amount of flash (1024k), RAM (256k) and CPU cycles (64 MHz)		* decent amount of flash (1024k), RAM (256k) and CPU cycles (64 MHz)
	* support various radio protocols like zigbee, ble, thread~~, matter~~, enhanced shockburst		* support various radio protocols like zigbee, ble, thread, enhanced shockburst
	* built-in support for quadrature counting		* built-in support for quadrature counting
	* ~~looks like it~~ can run arduino too		* can run arduino too

	However the eco-system of inexpensive boards is a complicated landscape:		However the eco-system of inexpensive boards is a complicated landscape:
	* AliExpress sellers offer "promicro" and "supermini" board with unclear characteristics		* AliExpress sellers offer "promicro" and "supermini" board with unclear characteristics
	* LEDs are ~~often~~ swapped (blue = hardware charge, red = software led?)		* LEDs are sometimes swapped (blue = hardware charge, red = software led?)
	* Various firmware upload interface options (which one to use?):		* Various firmware upload interface options (which one to use?):
	** Using nrfutil, sends a .zip file containing various parts		** Using nrfutil, sends a .zip file containing various parts, over USB-serial
	** Serial DFU, ~~used by nrfutil?~~		** Mass storage UF2, activated using the double-reset
	** Mass storage UF2, ~~possibly~~ activated using the double-reset
	** SWD debug interface (requires soldering!)		** SWD debug interface (requires soldering!)
	* Confusing situation regarding bootloaders:		* Confusing situation regarding bootloaders:
	** Most boards seem to come with a modified version of a bootloader meant for another type of board		** Most boards seem to come with a modified version of a bootloader meant for another type of board
	** Type of bootloader depends on type of firmware you want to run, "ZMK", Arduino using Arduino IDE, Arduino using platformio		** Type of bootloader depends on type of firmware you want to run, "ZMK", Arduino using Arduino IDE, Arduino using platformio
	** Space for "SoftDevice" needs to be reserved, what is this? -> it's a kind of binary blob implementing the bluetooth low-energy stack
	** Risk of accidentally overwriting the bootloader, with UF2 flash offsets sometimes being absolute, sometimes being relative		** Risk of accidentally overwriting the bootloader, with UF2 flash offsets sometimes being absolute, sometimes being relative