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#1
ESP32 / Re: PoE not powering
Last post by brettonw - July 15, 2025, 07:38:46 PMI built the ETH-LAN demo in the Arduino IDE, and uploaded it to the board via the USB interface. After reset, I disconnected the USB and plugged in the PoE ethernet - and the board does not power up.
I've tried multiple ethernet cords, and this is plugged into a high-end, new Unifi PoE++ switch that works with every other PoE device I have on my desk. I'm certain it's not the switch or the cord.
I've tried multiple ethernet cords, and this is plugged into a high-end, new Unifi PoE++ switch that works with every other PoE device I have on my desk. I'm certain it's not the switch or the cord.
#2
A20 / Re: Any suggestion?
Last post by LubOlimex - July 15, 2025, 12:50:22 PMYou need to run the video output script inside the image. After login run:
olinuxino-display
then enable the specific display. Reboot.
Be very careful about the connectors and the orientation. Track pin #1. Pin #1 from the LCD should go to pin #1 from the board LCD_CON connector.
olinuxino-display
then enable the specific display. Reboot.
Be very careful about the connectors and the orientation. Track pin #1. Pin #1 from the LCD should go to pin #1 from the board LCD_CON connector.
#3
A20 / Any suggestion?
Last post by Beatento - July 15, 2025, 11:55:39 AMHi all,
My LIME2 board is working fine with A20-OLinuXino-bullseye-base image if I connect it through HDMI, but 7" and 4.3" olimex LCDs are not working at all. No video, no light.
I'm using the 0.5 pitch 40 pin cable, and power up the LIME2 board with a 5V 2A power source.
Any suggestion? Thanks!
My LIME2 board is working fine with A20-OLinuXino-bullseye-base image if I connect it through HDMI, but 7" and 4.3" olimex LCDs are not working at all. No video, no light.
I'm using the 0.5 pitch 40 pin cable, and power up the LIME2 board with a 5V 2A power source.
Any suggestion? Thanks!
#4
ESP32 / Re: PoE not powering
Last post by LubOlimex - July 15, 2025, 08:50:37 AMEach ESP32-POE-ISO-16MB board is tested here with PoE powering. Chances of dead on delivery board are slim. Are you using
It could be anything poor code, QoS or firewall filtering of the ESP32 board, poor network settings.
Let's first rule out software problems - test with another software. Test with the LAN8720 demo from Arduino IDE.
First install the Espressif package for ESP32 for Arduino IDE (refer to this: https://docs.espressif.com/projects/arduino-esp32/en/latest/installing.html). Then select ESP32-POE-ISO from the list and select 16MB PSRAM (refer to the picture below), then load the LAN demo, it is available from Examples -> Ethernet -> ETH_LAN8720. After compilation and download are done, open serial monitor on the port to see if it successfully connects (you can also ping the address it gets).
It is imperative to enable the 16MB PSRAM!
Does the issue persist with the Arduino IDE demo?
It could be anything poor code, QoS or firewall filtering of the ESP32 board, poor network settings.
Let's first rule out software problems - test with another software. Test with the LAN8720 demo from Arduino IDE.
First install the Espressif package for ESP32 for Arduino IDE (refer to this: https://docs.espressif.com/projects/arduino-esp32/en/latest/installing.html). Then select ESP32-POE-ISO from the list and select 16MB PSRAM (refer to the picture below), then load the LAN demo, it is available from Examples -> Ethernet -> ETH_LAN8720. After compilation and download are done, open serial monitor on the port to see if it successfully connects (you can also ping the address it gets).
It is imperative to enable the 16MB PSRAM!
Does the issue persist with the Arduino IDE demo?
#5
ESP32 / PoE not powering
Last post by brettonw - July 14, 2025, 08:25:32 PMI have 2 ESP32-POE-IS-16MB boards. One works, the other doesn't.
I am programming them for ESPHome as Bluetooth Proxies, as follows:
1) Connect via USB-micro
2) Load firmware/program via ESPHome Website (https://esphome.io/projects/?type=bluetooth)
3) Unplug USB
4) Plug Ethernet with PoE
One of the boards works fine. The other appears to work while programming, but after unplugging from the USB it never gets power from the PoE (no lights, no link).
It's the same ethernet cable for both, connected to a Unifi managed PoE++ switch with plenty of power capacity, and normally used to run another PoE accessory.
Do I have a bad board, or is there something I need to do to turn on PoE functionality?
I am programming them for ESPHome as Bluetooth Proxies, as follows:
1) Connect via USB-micro
2) Load firmware/program via ESPHome Website (https://esphome.io/projects/?type=bluetooth)
3) Unplug USB
4) Plug Ethernet with PoE
One of the boards works fine. The other appears to work while programming, but after unplugging from the USB it never gets power from the PoE (no lights, no link).
It's the same ethernet cable for both, connected to a Unifi managed PoE++ switch with plenty of power capacity, and normally used to run another PoE accessory.
Do I have a bad board, or is there something I need to do to turn on PoE functionality?
#6
ESP32 / Re: ESP32-SBC-FabGL .. PCemula...
Last post by therese80 - July 13, 2025, 12:17:52 AMthanks for the advice ,
as i use linux i installed f3 and "Good news : the device is the real thing ...
and still the mystery .. that's the way is it ..
@+
therese80
as i use linux i installed f3 and "Good news : the device is the real thing ...
and still the mystery .. that's the way is it ..
@+
therese80
#7
MSP430 / Re: MSP430F5510 programming
Last post by LubOlimex - July 08, 2025, 09:35:29 AMThe hardware changes and the external power are not needed... The board has Li-Po battery connector when you want to measure minimal consumption.
Also it is strange place to place the multimeter to measure consumption.
Revert the changes and disconnect all power supply and use 3.7V Li-PO battery attached to the 2-pin connector. Pay attention to + and - since these connectors are not standard.
Then to measure ensure that pins are properly set. All pins should be evaluated in the schematic, some pins are pulled up. Those pins with pull up should be set as outputs and high state. Pins that are pulled down should be outputs and low state.
For example, the I2C pins at the UEXT are both pulled up. If these are not set as outputs in high state, they will consume power.
Notice that it makes no sense to measure only the chip, and it will be very hard to do but measuring when powered the battery should be nearly identical, there are only a couple of components consuming uAs and they won't influence the consumption that much.
Also it is strange place to place the multimeter to measure consumption.
Revert the changes and disconnect all power supply and use 3.7V Li-PO battery attached to the 2-pin connector. Pay attention to + and - since these connectors are not standard.
Then to measure ensure that pins are properly set. All pins should be evaluated in the schematic, some pins are pulled up. Those pins with pull up should be set as outputs and high state. Pins that are pulled down should be outputs and low state.
For example, the I2C pins at the UEXT are both pulled up. If these are not set as outputs in high state, they will consume power.
Notice that it makes no sense to measure only the chip, and it will be very hard to do but measuring when powered the battery should be nearly identical, there are only a couple of components consuming uAs and they won't influence the consumption that much.
#8
ESP32 / Re: ESP32-SBC-FabGL .. PCemula...
Last post by LubOlimex - July 08, 2025, 08:16:38 AMFirst consider formatting it completely. Maybe use the sd card alliance formatter - it is from the organization that maintains the standard.
Also consider that the card might be fake. There are a lot of counterfeit SD cards out there and also cards tend to get damaged easily. Good software for testing the SD cards is either f3 (fight flash fraud) or H2testW.
Also consider that the card might be fake. There are a lot of counterfeit SD cards out there and also cards tend to get damaged easily. Good software for testing the SD cards is either f3 (fight flash fraud) or H2testW.
#9
ESP32 / Re: ESP32-SBC-FabGL .. PCemula...
Last post by therese80 - July 07, 2025, 04:57:21 PMHi,
the old sdcard(Sandisk ultra 32GB) it works with my laptop(linux mint) , with
Olimex rp2040-pico-pc .. but not with esp32-sbc-fabgl ... formatted with FAT16/FAT32
the new SDCARD(Philips 32GB) format FAT16/FAT132 works on all systems.!
I don't know why ! Sandisk is not so universel? .
Next time if have the same problem , i begin by changing de brand of SDCARD ...
@+
Therese80 (aka TRS80)
the old sdcard(Sandisk ultra 32GB) it works with my laptop(linux mint) , with
Olimex rp2040-pico-pc .. but not with esp32-sbc-fabgl ... formatted with FAT16/FAT32
the new SDCARD(Philips 32GB) format FAT16/FAT132 works on all systems.!
I don't know why ! Sandisk is not so universel? .
Next time if have the same problem , i begin by changing de brand of SDCARD ...
@+
Therese80 (aka TRS80)
#10
MSP430 / Re: MSP430F5510 programming
Last post by Ahmed - July 07, 2025, 04:09:39 PM Subject: How to measure only MSP430F5510 current on OLIMEXINO-5510 Rev.B (disconnect all other power domains)
Hello,
I am using the OLIMEXINO-5510 Rev.B board with the MSP430F5510 MCU. I want to measure the pure current consumption of the MSP430, without interference from USB, FTDI, UEXT, Arduino headers, etc.
I already:
Removed USB power and supplied 3.3 V externally
Tried to isolate FET2 (IRLML6402) by pulling the gate to 3.3 V
Cut R4 (0 Ω jumper), and inserted a multimeter in series
But even then, I still measure ~57 mA, even when the MCU is in LPM4 mode.
❓ How can I completely isolate the MSP430 power rail and ensure only the MCU current is measured?
Does FET2 fully disconnect the 3.3 V_E rail if gate = 3.3 V?
Are there hidden leakage paths from FTDI or pullups?
Do you recommend removing more components (R5, C6, etc)?
Thanks in advance for any guidance!
Hello,
I am using the OLIMEXINO-5510 Rev.B board with the MSP430F5510 MCU. I want to measure the pure current consumption of the MSP430, without interference from USB, FTDI, UEXT, Arduino headers, etc.
I already:
Removed USB power and supplied 3.3 V externally
Tried to isolate FET2 (IRLML6402) by pulling the gate to 3.3 V
Cut R4 (0 Ω jumper), and inserted a multimeter in series
But even then, I still measure ~57 mA, even when the MCU is in LPM4 mode.
❓ How can I completely isolate the MSP430 power rail and ensure only the MCU current is measured?
Does FET2 fully disconnect the 3.3 V_E rail if gate = 3.3 V?
Are there hidden leakage paths from FTDI or pullups?
Do you recommend removing more components (R5, C6, etc)?
Thanks in advance for any guidance!