Recent posts

#11

UEXT / Re: MOD-IRDA faulty ?

Last post by LubOlimex - December 08, 2025, 09:13:51 AM

The problem is somewhere in your software. We've used MOD-IRDA with ESP32-POE boards in the past, specifically in this big web-server demo:

https://github.com/OLIMEX/ESP32-POE/blob/master/SOFTWARE/ARDUINO/ESP32_PoE_WebServer_Demo/ESP32_PoE_WebServer_Demo.ino

#12

UEXT / MOD-IRDA faulty ?

Last post by SirExie - December 06, 2025, 02:49:38 PM

Hi Folks,

I have a MOD-IRDA I'm using with an ESP32-POE-ISO-IND. The UEXT port makes this simple, but I have not been able to transmit via the module.

I'm using ESPHome, and I have it set to use GPIO4, but the client device never responds. I tried filming with the phone camera, but the IR is not visible.

I then tested the UEXT port using a Saleae, and all the pins work fine and I could even decode IRDA.

So my final test was ti check resistance across the the IR LED, and testing both polarities at 200 Ohm was an open circuit. Not what I expected, so I think the LED is faulty ?

No point posting it back, the local electronics shop have 3mm IR LED's for $1.50 so I'll try swapping this out first and see how I go.

How likely is it that this is the problem ? is there any other test I can do ?

#13

FPGA / Questions about GateMateA1-EVB...

Last post by mastupristi - December 06, 2025, 12:04:51 PM

Hello,
I have some question on GateMateA1-EVB-2M.

• I bought the card and saw that it is Rev C. Here https://github.com/OLIMEX/GateMateA1-EVB/tree/main/HARDWARE there are only Rev. A and B. Can you also publish Rev. C?
• Where can I find the VHDL or Verolog sources for the FPGA configuration with which the board is shipped?
• DirtyJtag (https://github.com/OLIMEX/GateMateA1-EVB/tree/main/SOFTWARE/dirtyJtag) is the Firmware that run on RP2040, isn't it?

best regards
Max

#14

New Products release / ESP32-C6-DevKit-Lipo

Last post by olimex - December 05, 2025, 03:29:34 PM

New Open Source Hardware board with ESP32-C6 WiFi 6, Bluetooth 5 LE, Zigbee, Thread / Matter with LiPo battery UPS to operate even when external power supply fails https://olimex.wordpress.com/2025/12/05/new-open-source-hardware-board-with-esp32-c6-wifi-6-bluetooth-5-le-zigbee-thread-matter-and-lipo-ups/ #espressif #esp32c6 #iot #wifi6 #zigbee #thread #matter #oshw

#15

A20 / Question about OLinuXino board...

Last post by Samuel Joseph - December 05, 2025, 12:25:29 PM

I am new here and I have OLinuXino A20 board. I try to use 5V power but sometimes board not start correct. I want ask what is best power adapter for OLinuXino? Also I want know if need capacitor for more stable power.
Thank you for help.

#16

New Products release / MOD-ESP32-C5

Last post by olimex - December 04, 2025, 12:21:38 PM

New Open Source Hardware board MOD-ESP32-C5 adds dual band WiFi6, Bluetooth 5 LE and Zigbee, Thread-Matter connectivity to any development board with UEXT connector https://olimex.wordpress.com/2025/12/04/new-open-source-hardware-board-mod-esp32-c5-adds-dual-band-wifi6-bluetooth-5-le-and-zigbee-thread-matter-connectivity-to-any-development-board-with-uext-connector/ #esp32 #espressif #esp32c5 #wifi6 #zigbee #thread #matter #iot

#17

ARDUINO / Re: BC66 NB-IoT Module (DevKiT...

Last post by ameero95 - December 03, 2025, 09:12:39 PM

Hello LubOlimex,

Did you write e-mail to the support or post in the forums? Please post in the Quectel forums and link me the forum thread where you requested the firmware.

I got that answer from emailing their support. I have requested for the firmware on the forums (https://forums.quectel.com/t/how-to-get-quectel-standard-firmware/36353/64) aswell. I'll wait for a reply from one of their support people. Thanks again.

#18

ARDUINO / Re: BC66 NB-IoT Module (DevKiT...

Last post by LubOlimex - December 03, 2025, 01:16:07 PM

Did you write e-mail to the support or post in the forums? Please post in the Quectel forums and link me the forum thread where you requested the firmware.

#19

ARDUINO / Re: BC66 NB-IoT Module (DevKiT...

Last post by ameero95 - December 03, 2025, 01:09:01 PM

Hello LubOlimex,

The chances are that what you found online is not the proper AT firmware for BC66.

I found the following firmware files:

• BC66NBR01A04.bin
• BootLoader_BC66NBR01A04.bin
• customer_779ed915-75c2-4447-9eed-afe06fd31908.dec
• flash_download.cfg

and used QFlash Tool v4.15 to flash the device. Do these firmware maybe sound familiar to you?

Let's see what happens with the firmware provided by Quectel. Sadly, I can't send it to you since the resource was deleted over here and it is not the latest version anyway.

Unfortunately, Quectel support reached out to me with this email

Hello Ammer,

Please understand that Quectel provides support only to its direct customers. Since Olimex Ltd. is our customer, it is necessary for you to first send your support request to them. If they are unable to provide the required support, they will forward your question to us. Thank you for your understanding.

Best Regards,

Nikola

After connecting the module to the USB, open the terminal on the COM port and if AT doesn't work, then press the RST_KEY1 (the inner button) and see if you get something over the serial.

After pressing the reset button I get this output from the device

Code Select Expand

[12:06:33:325] ␊
[12:06:33:325] ␍F1: 0000 0000␊
[12:06:33:325] ␍V0: 0000 0000 [0001]␊
[12:06:33:338] ␍00: 0006 000C␊
[12:06:33:338] ␍01: 0000 0000␊
[12:06:33:338] ␍U0: 0000 0001 [0000]␊
[12:06:33:338] ␍T0: 0000 00B4␊
[12:06:33:355] ␍Leaving the BROM␊
[12:06:33:355] ␍␊
[12:06:33:355] ␍
and no RDY message. Writing AT in the serial does not return anything.

Does the yellow LED turn on when you attach the USB?

Yes.

#20

ARDUINO / Re: BC66 NB-IoT Module (DevKiT...

Last post by LubOlimex - December 03, 2025, 09:42:30 AM

The chances are that what you found online is not the proper AT firmware for BC66. Let's see what happens with the firmware provided by Quectel. Sadly, I can't send it to you since the resource was deleted over here and it is not the latest version anyway.

After connecting the module to the USB, open the terminal on the COM port and if AT doesn't work, then press the RST_KEY1 (the inner button) and see if you get something over the serial.

Maybe the board goes to sleep too fast to accept at commands.

Does the yellow LED turn on when you attach the USB?