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#91
New Products release / UEXT-3TO5V converter
Last post by olimex - June 10, 2025, 02:29:50 PMNew open source hardware board UEXT-3TO5V allow 5V devices and sensors to be powered and accessed by 3.3V UEXT boards https://olimex.wordpress.com/2025/06/10/new-open-source-hardware-board-uext-3-to-5v-converter-allows-5v-devices-and-sensors-to-be-connected-to-uext-boards-with-3-3v-levels/ #uext #oshw #sensor #spi #i2c #uart
#92
ST / Re: LoRa-STM32WL-DevKIT: After...
Last post by Volker - June 09, 2025, 07:24:59 PM<comparison and evaluation of similar products is part of the engineering process>
It is also part of the engineering process to decide if a project is a waste of time and resources or not.
See, we did put a lot of time into this project.
1. It took a lot of time to find out that the onboard debugger interface is no more working. https://www.olimex.com/forum/index.php?topic=9750.0
2. It took a lot of time to find out that the firmware of the module does not receive (or handle) the joined message properly.
3. We also found that the peripheral chip for the sensors is not initialized properly. One has to reset the chip after power-on to get it running.
This is why we give up. It is more efficient to use another module with less buggy software as a starting point.
It is also part of the engineering process to decide if a project is a waste of time and resources or not.
See, we did put a lot of time into this project.
1. It took a lot of time to find out that the onboard debugger interface is no more working. https://www.olimex.com/forum/index.php?topic=9750.0
2. It took a lot of time to find out that the firmware of the module does not receive (or handle) the joined message properly.
3. We also found that the peripheral chip for the sensors is not initialized properly. One has to reset the chip after power-on to get it running.
This is why we give up. It is more efficient to use another module with less buggy software as a starting point.
#93
New Products release / iMX8MP-SOM-4GB now with OpenWR...
Last post by olimex - June 09, 2025, 02:02:34 PMiMX8MaxPlus Open Source Hardware board iMX8-SOM-4GB got OpenWRT support from Zoltan Herpai https://olimex.wordpress.com/2025/06/09/openwrt-support-for-the-open-source-hardware-imx8maxplus-board-imx8-som-4gb/ #nxp #imx8maxplus #linux #mainline #openwrt #oshw
#94
New Products release / Re: MIPI DSI LCD 2.8 inch with...
Last post by LubOlimex - June 09, 2025, 09:25:07 AMDemos were just uploaded, you can find them in the GitHub sub-folder:
https://github.com/OLIMEX/ESP32-P4-DevKit/tree/main/SOFTWARE/Demo_Examples
I've added also RPi drivers for the LCD at its page.
> I am planning to use another display based on the same ST7701S driver in the future.
The code might not work with another display, even if the driver is the same. Some LCD initializing routine is vendor-specific and provided by the vendor. Check line 205-206 from the main code:
"static const st7701_lcd_init_cmd_t lcd_init_cmds[] = {..."
The initialization code was taken from the drivers for the LCD.
https://github.com/OLIMEX/ESP32-P4-DevKit/tree/main/SOFTWARE/Demo_Examples
I've added also RPi drivers for the LCD at its page.
> I am planning to use another display based on the same ST7701S driver in the future.
The code might not work with another display, even if the driver is the same. Some LCD initializing routine is vendor-specific and provided by the vendor. Check line 205-206 from the main code:
"static const st7701_lcd_init_cmd_t lcd_init_cmds[] = {..."
The initialization code was taken from the drivers for the LCD.
#95
ESP32 / Re: POE powered relays
Last post by Stipulate2010 - June 04, 2025, 04:16:02 PMExactly what I needed to know, thank you so much.
#96
ESP32 / Re: POE powered relays
Last post by LubOlimex - June 04, 2025, 08:12:13 AMESP32-POE can't power MOD-IO2 sufficiently - MOD-IO2 requires 12V DC and ESP32-POE doesn't have 12V DC output.
Consider using ESP32-POE2 instead which has 12V DC output:
https://www.olimex.com/Products/IoT/ESP32/ESP32-POE2/open-source-hardware
You would also need a cable like this between the 12V DC output and the power jack of MOD-IO2:
https://www.olimex.com/Products/Components/Cables/PWR-CABLE/
Consider using ESP32-POE2 instead which has 12V DC output:
https://www.olimex.com/Products/IoT/ESP32/ESP32-POE2/open-source-hardware
You would also need a cable like this between the 12V DC output and the power jack of MOD-IO2:
https://www.olimex.com/Products/Components/Cables/PWR-CABLE/
#97
ESP32 / POE powered relays
Last post by Stipulate2010 - June 03, 2025, 10:27:57 PMI am trying to put together a device that is POE powered with Relays. I was looking at the ESP32-POE and the MOD-IO2. My desire is to use it with ESPhome. I am not clear though that there is enough power to trigger the relays. If anyone has knowledge of this or a different combination of products I would appreciate it.
Thanks.
Thanks.
#98
ST / Re: LoRa-STM32WL-DevKIT: After...
Last post by LubOlimex - June 03, 2025, 03:37:34 PMWell, it is sad that it turned out this way, but comparison and evaluation of similar products is part of the engineering process. We do the same when selecting components or parts.
#99
ST / Re: LoRa-STM32WL-DevKIT: After...
Last post by Volker - June 03, 2025, 02:06:50 PMThank you for your advice.
Anyway, we put a lot of effort into this project. We found out that neither the onboard debugger does work properly nor that the provided sample software is tested properly.
According to your advice we shall now adapt the sample software by ST from ST sample boards to the Olimex board.
No, we don't. We give up with this board and put it to scrap. We look for a board from another vender with better support. Good bye Olimex.
Anyway, we put a lot of effort into this project. We found out that neither the onboard debugger does work properly nor that the provided sample software is tested properly.
According to your advice we shall now adapt the sample software by ST from ST sample boards to the Olimex board.
No, we don't. We give up with this board and put it to scrap. We look for a board from another vender with better support. Good bye Olimex.
#100
ST / Re: LoRa-STM32WL-DevKIT: After...
Last post by LubOlimex - June 03, 2025, 10:58:22 AMAlso if I remember correct the demo at the web was some ping-pong demo between two LoRa-STM32WL-DevKIT boards would communicate over LoRa and print some data over the serial (if I remember one says PING and the other PONG).
I don't think this specific demo was tested in the TTN network, mainly because the TTN networks in our town don't reach our location. So we made some demo went to the center of the city tested the boards confirmed them working and all future tests were done between two boards.
I don't think this specific demo was tested in the TTN network, mainly because the TTN networks in our town don't reach our location. So we made some demo went to the center of the city tested the boards confirmed them working and all future tests were done between two boards.