ESP32 Bootloop with DMX enabled

[davidboon78]

Hey, so I'm trying to enable DMX on an ESP32 and it gets stuck in a bootloop, never even gets to initial setup screen. Is there a better version to use?

• Board: ESP32 dev (ESP32-WROOM-32)
• Version WLED v0.10.2
• Format Self compiled from Arduino IDE

Let me know if there's anything I can add. I literally only disabled websockets and enabled dmx.

Thank you for your help!

[Aircoookie]

Hi! Try a setting a different LED pin in NpbWrapper.h, GPIO 2 is the DMX pin.

We also have a PR that proposes a different DMX library as the one currently used might only work on ESP8266: https://github.com/Aircoookie/WLED/pull/817 However, it is quite dated and would need to be updated significantly in order to work with the current master.

[davidboon78]

I'm currently using GPIO 12.. is there a recommended pin? I'll also try that alternate library. Thanks!

[davidboon78]

I figured out that i don't need to enable dmx to use artnet from resolume.. sorry to have bothered you. lol thank you for taking the time to respond though.

[Aircoookie]

Glad you got Art-Net working! Doesn't change anything though about the fact that DMX out seems to be problematic on ESP32, so thank you for reporting :)

[davidboon78]

I did try out that fork and it worked well, though he includes the library twice so I had to comment one of them out.

Also found with 1024 leds the framerate was way too low. But I guess thats asking a lot of an esp32.

[Aircoookie]

The framerate was low in general (effects), with DMX out enabled or with Art-Net? 1024 LEDs are able to achieve exactly 30fps, which is not that bad. However you need 7 DMX universes to transmit that via Art-Net. It would be faster via TPM2.net if your sending software supports that, you'll only need 3 packets with a packet size of 1030 bytes each.

[davidboon78]

It doesn't seem slow with the effects. Just artnet. Resolume only supports artnet, does wled support tpm2.net?

[Aircoookie]

WLED does since 0.10.2, but that won't help you if Resolume only supports Artnet. In my experience, the maximum "smooth" amount of DMX universes in Art-Net is 3 (= 510 LEDs), sorry about that.

[smalljoshua]

I'll add that I'm still seeing this bootloop on 0.11.1 on ESP32, I'm not well-enough versed to swap out the libraries as discussed in #817 in the latest release. Any suggestions? I've changed the LED pin to 3 from 2 and kept the DMX pin at 2. I've disabled things like Alexa, Blynk, Hue & IR to try and lighten the load on the processor. If I can do sACN send I could do that instead if anyone has any ideas?

E2A: I've swapped in the other library from #817 however not in any "nice" way. I'd strongly suggest that this should be adopted as the formal library for DMX out. It's running happily with 400 odd channels being output.

[robiness]

Hello everybody! I am also having a bootloop with DMX being enabled on 0.11.1 on ESP32, Without DMX it is working as expected :)

The decoded Stacktrace is

PC: 0x400817b1: _uart_isr at C:\users\robin\.platformio\packages\framework-arduinoespressif32\cores\esp32\esp32-hal-uart.c line 83
EXCVADDR: 0x00000000

Decoding stack results
0x400817b1: _uart_isr at C:\users\robin\.platformio\packages\framework-arduinoespressif32\cores\esp32\esp32-hal-uart.c line 83
0x4008b0ed: vTaskExitCritical at /home/runner/work/esp32-arduino-lib-builder/esp32-arduino-lib-builder/esp-idf/components/freertos/tasks.c line 4274
0x4011689e: esp_intr_alloc_intrstatus at /home/runner/work/esp32-arduino-lib-builder/esp32-arduino-lib-builder/esp-idf/components/esp32/intr_alloc.c line 666
0x401168f1: esp_intr_alloc at /home/runner/work/esp32-arduino-lib-builder/esp32-arduino-lib-builder/esp-idf/components/esp32/intr_alloc.c line 686
0x40112249: uartEnableInterrupt at C:\users\robin\.platformio\packages\framework-arduinoespressif32\cores\esp32\esp32-hal-uart.c line 110
0x40112353: uartAttachRx at C:\users\robin\.platformio\packages\framework-arduinoespressif32\cores\esp32\esp32-hal-uart.c line 151
0x40112762: uartBegin at C:\users\robin\.platformio\packages\framework-arduinoespressif32\cores\esp32\esp32-hal-uart.c line 214
0x4010f100: HardwareSerial::begin(unsigned long, unsigned int, signed char, signed char, bool, unsigned long) at C:\users\robin\.platformio\packages\framework-arduinoespressif32\cores\esp32\HardwareSerial.cpp line 55
0x400f19eb: DMXESPSerial::update() at wled00/src/dependencies/dmx/ESPDMX.cpp line 93
0x400e44cf: handleDMX() at wled00/dmx.cpp line 58
0x400f4b70: WLED::loop() at wled00/wled.cpp line 159
0x400f5556: loop() at D:/Develop/LEDESP32/WLED/WLED/wled00/wled00.ino line 20
0x40112b5d: loopTask(void*) at C:\users\robin\.platformio\packages\framework-arduinoespressif32\cores\esp32\main.cpp line 19
0x40089f81: vPortTaskWrapper at /home/runner/work/esp32-arduino-lib-builder/esp32-arduino-lib-builder/esp-idf/components/freertos/port.c line 143

So i guess it's an issue with ESPDMX. LXESP32DMX does use a modified version of esp32-hal-uart.c.

I am super interested in a working DMX output for this awsome project and i am willing to contribute but i am no c++ developer but i'll see what I can do.

[stale[bot]]

Hey! This issue has been open for quite some time without any new comments now. It will be closed automatically in a week if no further activity occurs. Thank you for using WLED!

[lplassman]

DMX Output is still not working as expected for me as well when using an ESP32.