This is my WIP DIY nRF82540 4.2inch version:
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This is howto use PlatformIO to debug your code running on nRF82540 via ST-LINK/V2 (mini)
Connect your ST-LINK/V2 (mini) to the SWDIO pins and fire up (leave this running, to be used by PIO later)
openocd -f interface/stlink.cfg -f target/nrf52.cfg
This is the connection to the PCA10059 Dongle (WaveShare ST-LINK/V2 (mini))
https://www.waveshare.com/wiki/ST-LINK/V2_(mini)
Modify the existing Meshtastic .vscode/launch.json
{
"type": "platformio-debug",
"request": "launch",
"name": "PIO Debug",
"executable": "/home/user/build/ms/test/Meshtastic-device/.pio/build/pca10059_diy_eink/firmware.elf",
"projectEnvName": "pca10059_diy_eink",
"toolchainBinDir": "/home/user/.platformio/packages/toolchain-gccarmnoneeabi/bin",
"internalConsoleOptions": "openOnSessionStart",
"preLaunchTask": {
"type": "PlatformIO",
"task": "Pre-Debug"
}
Modify your variant platformio.ini with debug_tool and debug_init changes below
[env:pca10059_diy_eink]
extends = nrf52840_base
board = nordic_pca10059
build_flags = ${nrf52840_base.build_flags} -Ivariants/Dongle_nRF52840-pca10059-v1 -D NORDIC_PCA10059
src_filter = ${nrf52_base.src_filter} +<../variants/Dongle_nRF52840-pca10059-v1>
lib_deps =
${nrf52840_base.lib_deps}
https://github.com/ZinggJM/GxEPD2.git
debug_tool = custom
debug_init_cmds =
target extended-remote localhost:3333
$INIT_BREAK
monitor reset halt
$LOAD_CMDS
monitor init
monitor reset halt
Open “main.cpp” and press F5 to step into your code
3 Likes
This DIY nRF82540 PCA10059 4.2inch NiceRF 868 variant has been merged and I will soon post guides for the Adafruit bootloader flash
meshtastic:master ← markbirss:master
opened 01:29PM - 05 Apr 22 UTC
This requires
https://github.com/meshtastic/Meshtastic-protobufs/pull/137
… Kindly review and comment
2 Likes
That’s cool. Any plans for running it on battery?
1 Like
Yes, ideas and suggestions are welcome, I used parts that I currently have
Since this is a Raspberry Pi HAT
and
For Portability
These Adafruit options listed could work (I am not able to get these easilty)
PowerBoost 1000 Charger - Rechargeable 5V Lipo USB Boost @ 1A - 1000C
PowerBoost 1000 Basic - 5V USB Boost @ 1000mA from 1.8V+]
PowerBoost 500 Basic - 5V USB Boost @ 500mA from 1.8V+
Or by using this cheap TP4056 LiPo board
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This would be the simplest way to add a battery (currently)
9V battery connected to the OPEN-SMART
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Ya, wondering how long it would last. I suppose it could last a bit on a larger lithium battery, but the raspberry pi is going to be fairly power-hungry,right? I ask because I’m interested in getting or making a stand-along lorawan communication device (preferably something no bigger than a phone) that’s cheap and pretty rugged, but most lorawan applications are bluetooth-to-phone requiring two devices (and not cheap).
That Waveshare Power Management HAT will shutdown when low battery voltage is detectedhttps://www.waveshare.com/wiki/Power_Management_HAT
How long it will last will depend on your power draw and size of battery backup
I do not have equipment to test power usage other than a Watt Meter at the moment
I used the WaveShare Power Management HAT with my 9.7 inch Serial E-Paper Terminal (got a couple hours usage on Pi3A and Pi Zero)
The nRF82540 is very low power and the e-paper is turned-off after updates so it will depend on actual usage, but you can expect long usage even with a single LiPo
Neil
April 10, 2022, 7:59am
9
You may DIY a power meter using TI INA226 power monitor IC, as this:https://uniteng.com/wiki/doku.php?id=esp32:flashdownloader2
2 Likes
Oh coool, thank you for sharing, i just remembered i have a stand-alone USB device
The non-color version
Should be able to use it to make some basic measurements
2 Likes
Here is a reading after 7H 13M 30S
Peak current used at 12V was about 150mA
In order to flash Meshtastic we must replace the stock open bootloader with Adafruit NRF52 Bootloader that support UF2.
The module comes without pin headers soldered, so you need either add the SWDIO, SWDCLK, GND and VDD Out pins or 3d print a holder that uses pogo-pins
SWDCLK and SWDIO Pins (these are connected to either J-Link or ST-LINK2)
3.3V - VDD Out
https://infocenter.nordicsemi.com/pdf/nRF52840_Dongle_User_Guide_v1.0.pdf
https://github.com/adafruit/Adafruit_nRF52_Bootloader/releases/download/0.6.3/pca10059_bootloader-0.6.3_s140_6.1.1.hex
Open a terminal and run
sudo ./openocd -f ../share/openocd/scripts/interface/stlink.cfg -f ../share/openocd/scripts/target/nrf52.cfg -c init -c "reset init" -c halt -c "nrf5 mass_erase" -c "program pca10059_bootloader-0.6.3_s140_6.1.1.hex verify" -c reset -c exit
sudo ./openocd -f ../share/openocd/scripts/interface/jlink.cfg -f ../share/openocd/scripts/target/nrf52.cfg -c init -c "reset init" -c halt -c "nrf5 mass_erase" -c "program pca10059_bootloader-0.6.3_s140_6.1.1.hex verify" -c reset -c exit
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I have received rechargeable 9V 800 mAh batteries that I will test soon
This is the current connection diagram
Neil
April 20, 2022, 1:08pm
18
Hi mark,
For the low power screen, I was attracted by this one:
The power consumption is 25uA @3.3V and it is much cheaper than eink.
1 Like
Thank you for sharing, i also saw this other Sharp memory display used here 400x240
There is some driver support
Will look more into these, sourcing and connection might be issue for me
Then actuality using them in Meshtastic is another
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The 9v batteries i tested only lasted just over 14 hours and stopped working as the voltage dropped down to 6v. 1V over 5V for the 2 stage 5v, 3.3v Open Smart module voltage regulators
Then i used a 3.3v low dropout voltage regulator directly and it also lasted just over 14 hours
So i could not get to use the rated 800mAh life of these batteries (possibly wrongly rated)
Next i will use 2 x LiPo18650 batteries in series
Just waiting for some battery holder’s
