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#91
ESP32 / Re: ESP32-DevKit-Lipo Power Sw...
Last post by wezzer - July 29, 2025, 12:27:20 PMHi. Thank you for responding.
I was probably not expressing very clearly what I was trying to achieve, I am building a device that has the ESP32-DevKit-Lipo at its core. It has an external usb power supply which will be connected only when required to charge the LiPo battery.
As this unit will be used for a few hours at a time and then put away I am hoping to charge the LiPo battery whilst connected to the usb after the device has been used and then remove the usb connection leaving the battery fully charged for the next use which will be away from any external power source.
I have very little experience of using LiPo batteries and so wanted to know whether by inseting an latching switch in the LiPo positive lead I could turn the ESP32 off in storage and so keep the LiPo battery fully charged ready for the unit's next use.
As stated before, I accept that the new switch will need to be on in order to recharge the LiPo battery when the unit is powered from the USB lead.
This unit may well be left off for a number of weeks between uses.
Thanks for your help,
Wezzer
I was probably not expressing very clearly what I was trying to achieve, I am building a device that has the ESP32-DevKit-Lipo at its core. It has an external usb power supply which will be connected only when required to charge the LiPo battery.
As this unit will be used for a few hours at a time and then put away I am hoping to charge the LiPo battery whilst connected to the usb after the device has been used and then remove the usb connection leaving the battery fully charged for the next use which will be away from any external power source.
I have very little experience of using LiPo batteries and so wanted to know whether by inseting an latching switch in the LiPo positive lead I could turn the ESP32 off in storage and so keep the LiPo battery fully charged ready for the unit's next use.
As stated before, I accept that the new switch will need to be on in order to recharge the LiPo battery when the unit is powered from the USB lead.
This unit may well be left off for a number of weeks between uses.
Thanks for your help,
Wezzer
#92
New Products release / Secure boot now available for ...
Last post by olimex - July 29, 2025, 12:02:26 PMIf you need Secure Boot for STM32MP157 , we got you covered with STMP157-SOM-512-SB and STMP157-OLinuXino-LIME2H-SB now featuring STM32MP157FAA1 extended temperature range -20+105C running at 800Mhz and secure boot https://olimex.wordpress.com/2025/07/29/we-can-now-offer-version-of-smt32mp157-boards-with-secure-boot-and-aes256/ #stm32mp157 #secure #boot #trustzone
#93
A20 / Re: Old olinuxino a20 kernel i...
Last post by LubOlimex - July 29, 2025, 08:41:47 AMI have no idea what is this file, even if there was one, it is probably gone by now.
If your board has eMMC download the A20_OLinuxino_Micro_debian_Jessie_34_103_2G_eMMC_release_18.zip archive, extract it prepare an SD card with it, boot and type ./emmc.sh - this will install the Linux image to the eMMC.
It is quite likely that the release above does what you want (e.g. boots from SPI then transfers the boot process to eMMC).
If your board has eMMC download the A20_OLinuxino_Micro_debian_Jessie_34_103_2G_eMMC_release_18.zip archive, extract it prepare an SD card with it, boot and type ./emmc.sh - this will install the Linux image to the eMMC.
It is quite likely that the release above does what you want (e.g. boots from SPI then transfers the boot process to eMMC).
#94
Biofeedback - EEG, ECG, EKG / Re: New Linux application for ...
Last post by michaloblastni - July 29, 2025, 03:50:02 AMHere is an Android support for EEG-SMT:
https://github.com/michaloblastni/local-neural-monitoring-android/tree/main
I've also tried ECG to prove the visualization works correctly. Both channels were tested.
This is an alpha version for developers. You may use it, but it's not perfect, yet.
https://github.com/michaloblastni/local-neural-monitoring-android/tree/main
I've also tried ECG to prove the visualization works correctly. Both channels were tested.
This is an alpha version for developers. You may use it, but it's not perfect, yet.
#95
Neo6502 / Re: About Apple II emulator an...
Last post by Ralf - July 28, 2025, 11:07:30 PMYou might want to google a tool that can read and write into apple2-disk-images.
#96
Neo6502 / Re: Problems reading USB drive...
Last post by Ralf - July 28, 2025, 10:42:27 PMQuote from: stingrayce1982@gmail.com on July 28, 2025, 12:32:32 AMI'm not seeing any messages that would show that the NEO6502 has recognized the USB drive(key).
That message actually only appears when using the Morpheus firmware.
You probably want to use the firmware and disk image in this zip-file:
https://ftp.olimex.com/Neo6502/blank_disk_for_apple2e_code_development_apple2e_ProDOS_2_4_3.zip
Reflash the Neo6502 with the apple2e.uf2 and put the pro-dos-image in the root directory of your USB key.
On boot of the neo6502 that disk image will then be mounted as S7,D1 and is writable.
Cheers
#97
Biofeedback - EEG, ECG, EKG / New Linux application for EEG-...
Last post by michaloblastni - July 28, 2025, 08:45:34 PMI've created a Linux port of the Local Neural Monitoring application for EEG-SMT:
https://gist.github.com/michaloblastni/08534a2bfb258f35e1bfebf73c34efaf
It's tested on Ubuntu 24.02 LTS.
You may find it easy to extend. The license is MIT, so you can integrate this code into both personal and commercial projects.
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Android Support?
Do you think EEG-SMT can be plugged into a USB OTG adapter, connected to an Android phone, and an Android app will then be able to nicely read EEG data from it?
One low-level app for a PoC is https://play.google.com/store/apps/details?id=de.kai_morich.serial_usb_terminal I wonder if someone has tried running it on Android.
It works!
Since the PoC has been successful, I can develop an Android app for Local Neural Monitoring.
Note: My ADUM3160 USB isolator doesn't work in USB OTG mode. That said, connecting the EEG-SMT directly to a smartphone doesn't pose any safety risk of electrocution since USB OTG has only 5 volts.
https://gist.github.com/michaloblastni/08534a2bfb258f35e1bfebf73c34efaf
It's tested on Ubuntu 24.02 LTS.
You may find it easy to extend. The license is MIT, so you can integrate this code into both personal and commercial projects.
----------------------------------------------------------------------
Android Support?
Do you think EEG-SMT can be plugged into a USB OTG adapter, connected to an Android phone, and an Android app will then be able to nicely read EEG data from it?
One low-level app for a PoC is https://play.google.com/store/apps/details?id=de.kai_morich.serial_usb_terminal I wonder if someone has tried running it on Android.
It works!
Since the PoC has been successful, I can develop an Android app for Local Neural Monitoring.
Note: My ADUM3160 USB isolator doesn't work in USB OTG mode. That said, connecting the EEG-SMT directly to a smartphone doesn't pose any safety risk of electrocution since USB OTG has only 5 volts.
#98
A20 / Re: Old olinuxino a20 kernel i...
Last post by luimarma - July 28, 2025, 05:50:09 PMI have copied the image to an sd card. Inside there is no flashcp program and /dev/mtd0 doesn't exist, so I cant flash the u-boot to the SPI flash.
Is maybe this covered in this file commented in another thread?
migrate_to_SPI_eMMC_boot.txt
The thread is this one:
https://www.olimex.com/forum/index.php?topic=7252.0
Is maybe this covered in this file commented in another thread?
migrate_to_SPI_eMMC_boot.txt
The thread is this one:
https://www.olimex.com/forum/index.php?topic=7252.0
#99
A64 / Re: Counting IRQ interrupts on...
Last post by LubOlimex - July 28, 2025, 04:37:26 PMNo idea but the info is for the sunxi images, and I don't think we've released official sunxi image for the A64 boards. The info probably won't apply for mainline images or Olimage Linux. Even the older images that we released for A64 boards (and are still available the the FTP), the Armbian-based ones, weren't with sunxi kernel.
#100
iMX233 / Suspend Mode current - IMX233 ...
Last post by srungerson - July 28, 2025, 04:14:22 PMHi,
I have to restore a legacy IMX233 platform and have re-imaged a WinCE 6.0 board SD Boot to Linux version 2.6.35 and EVERYTHING seems to work!
I have 2 questions in case anyone remembers all this!
Question 1>
Power in sleep mode under WinCE was just 15-20mw (4ma), but under Linux I go from normal power (~80ma) to just 60ma, not the 4ma I see in WinCE.
Should I expect the same 4ma Sleep mode from Linux as in WinCE? I can't find any specs
Question 2.
I understand there is a build 3.7.1 Does anyone have any experience in this or know where to find a .ISO or .IMG? Would anyone be willing to consult (or just help us) with advise on this IMX233 hardware update?
Thank you in advance!
SR
I have to restore a legacy IMX233 platform and have re-imaged a WinCE 6.0 board SD Boot to Linux version 2.6.35 and EVERYTHING seems to work!
I have 2 questions in case anyone remembers all this!
Question 1>
Power in sleep mode under WinCE was just 15-20mw (4ma), but under Linux I go from normal power (~80ma) to just 60ma, not the 4ma I see in WinCE.
Should I expect the same 4ma Sleep mode from Linux as in WinCE? I can't find any specs
Question 2.
I understand there is a build 3.7.1 Does anyone have any experience in this or know where to find a .ISO or .IMG? Would anyone be willing to consult (or just help us) with advise on this IMX233 hardware update?
Thank you in advance!
SR