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SDR & HDR 1080p/4k capable setup with Hyperion-NG for Media Center

Discussion in 'Hyperion Setup Showcase' started by Awawa, 27 July 2020.

  1. SiLAnceR

    SiLAnceR Member

    Messages:
    34
    Hardware:
    RPi2
    hyperhdr:8090 isn´t working - no conneciton.
    With the "untouched" hyperion.ng version the connection with ip+8090 works...i can reach the webinterface

    @Awawa: it doesn´t work

    [email protected]:~ $ /usr/bin/hyperiond -d
    Illegal instruction
    [email protected]:~ $
     
  2. SiLAnceR

    SiLAnceR Member

    Messages:
    34
    Hardware:
    RPi2
    hmm...:(
     

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  3. Awawa

    Awawa Active Member

    Messages:
    228
    Hardware:
    RPi1/Zero, RPi3, +nodeMCU/ESP8266
    Frankly I didn't test it with Rpi 2 myself...only 1 and 3,4 in separate packages. Maybe one compiler optimization too far for that plaform.
    Try to write SD image for Rpi 1 as it should be safe option. Next if you interested I can tweak build to make it works for Rpi2.
     
  4. SiLAnceR

    SiLAnceR Member

    Messages:
    34
    Hardware:
    RPi2
    I can use the Rpi1 image with my pi2?
     
  5. Awawa

    Awawa Active Member

    Messages:
    228
    Hardware:
    RPi1/Zero, RPi3, +nodeMCU/ESP8266
    • Like Like x 1
  6. SiLAnceR

    SiLAnceR Member

    Messages:
    34
    Hardware:
    RPi2
    It seems to work.
     
    Last edited: 3 November 2020
  7. Puck

    Puck Member

    Messages:
    74
    I've noticed that my LEDS sometimes turn off for a second or 2 and then turn on again. Turned on Debug logging and it gave me the following:

    Code:
    2020-11-04T18:47:14.062Z [hyperiond V4L2:/DEV/VIDEO0] (DEBUG) (V4L2Grabber.cpp:1027:process_image()) Video FPS: 60.02, av. delay: 7ms, good: 3599, bad: 2 (60.00,15)
    2020-11-04T18:47:18.056Z [hyperiond HYPERION] (DEBUG) (PriorityMuxer.cpp:238:setInputImage()) Priority 200 is now inactive
    2020-11-04T18:47:18.056Z [hyperiond HYPERION] (DEBUG) (PriorityMuxer.cpp:333:setCurrentTime()) Set visible priority to 255
    2020-11-04T18:47:18.056Z [hyperiond HYPERION] (DEBUG) (Hyperion.cpp:550:handlPriorityChangedLedDevice()) priority[255], previousPriority[200]
    2020-11-04T18:47:18.056Z [hyperiond HYPERION] (DEBUG) (Hyperion.cpp:553:handlPriorityChangedLedDevice()) No source left -> switch LED-Device off
    2020-11-04T18:47:18.056Z [hyperiond LEDDEVICE] (DEBUG) (LedDeviceWled.cpp:150:powerOff())
    2020-11-04T18:47:18.057Z [hyperiond LEDDEVICE] (DEBUG) (ProviderRestApi.cpp:153:put()) PUT: [http://192.168.0.40/json/state] [{"on":false}]
    2020-11-04T18:47:18.058Z [hyperiond BLACKBORDER] (DEBUG) (ImageProcessor.cpp:156:setHardLedMappingType()) set hard led mapping to multicolor_mean
    2020-11-04T18:47:18.182Z [hyperiond LEDDEVICE] (DEBUG) (ProviderRestApi.cpp:182:getResponse()) Reply.httpStatusCode [200]
    2020-11-04T18:47:19.122Z [hyperiond HYPERION] (DEBUG) (PriorityMuxer.cpp:238:setInputImage()) Priority 200 is now active
    2020-11-04T18:47:19.123Z [hyperiond HYPERION] (DEBUG) (PriorityMuxer.cpp:333:setCurrentTime()) Set visible priority to 200
    2020-11-04T18:47:19.126Z [hyperiond HYPERION] (DEBUG) (Hyperion.cpp:550:handlPriorityChangedLedDevice()) priority[200], previousPriority[255]
    2020-11-04T18:47:19.127Z [hyperiond HYPERION] (DEBUG) (Hyperion.cpp:560:handlPriorityChangedLedDevice()) new source available -> switch LED-Device on
    2020-11-04T18:47:19.128Z [hyperiond BLACKBORDER] (DEBUG) (ImageProcessor.cpp:156:setHardLedMappingType()) set hard led mapping to multicolor_mean
    2020-11-04T18:47:19.128Z [hyperiond LEDDEVICE] (DEBUG) (LedDeviceWled.cpp:132:powerOn())
    2020-11-04T18:47:19.129Z [hyperiond LEDDEVICE] (DEBUG) (ProviderRestApi.cpp:153:put()) PUT: [http://192.168.0.40/json/state] [{"on":true}]
    
    Not sure if this is core Hyperion related or HyperHDR but thought I ask here. I do not have CEC or Signal Detection turned on. Is my grabber/usb connection unstable or something else? It there a way to just ignore this and don't turn off the leds?

    Edit: I have now set a neutral color as 'Background Effect/Color" which will make sure LEDs are not turned off, but still now idea why the grabber signal is lost for tiny second.
     
    Last edited: 4 November 2020
  8. Awawa

    Awawa Active Member

    Messages:
    228
    Hardware:
    RPi1/Zero, RPi3, +nodeMCU/ESP8266
    You are not the only person affected by these symptom. Hyperion.ng is also affected. I disabled CEC and all system grabbers in latest build anyway.
    1) eliminate hardware problem checking for errors in dmesg (not the boot stuff but after hyperhdr is started)
    2) it's seems that it lost signal for about 1 second, it's too bad that you cut off that log...
     
  9. Puck

    Puck Member

    Messages:
    74
    I didn't cut anything in the logs, this was everything in there from losing signal till getting one again :) I'll check dmesg output, but hard to time it with the logs of Hyperion.
     
  10. Awawa

    Awawa Active Member

    Messages:
    228
    Hardware:
    RPi1/Zero, RPi3, +nodeMCU/ESP8266
    I mean that I dont see what was after that (next video stats for frames to compare statement from PriorityMuxer that cut off leds vs provided frames)
     
  11. Puck

    Puck Member

    Messages:
    74
    Ah I'm sorry, I misunderstood. Here's a bit more after:

    Code:
    2020-11-04T18:47:14.062Z [hyperiond V4L2:/DEV/VIDEO0] (DEBUG) (V4L2Grabber.cpp:1027:process_image()) Video FPS: 60.02, av. delay: 7ms, good: 3599, bad: 2 (60.00,15)
    2020-11-04T18:47:18.056Z [hyperiond HYPERION] (DEBUG) (PriorityMuxer.cpp:238:setInputImage()) Priority 200 is now inactive
    2020-11-04T18:47:18.056Z [hyperiond HYPERION] (DEBUG) (PriorityMuxer.cpp:333:setCurrentTime()) Set visible priority to 255
    2020-11-04T18:47:18.056Z [hyperiond HYPERION] (DEBUG) (Hyperion.cpp:550:handlPriorityChangedLedDevice()) priority[255], previousPriority[200]
    2020-11-04T18:47:18.056Z [hyperiond HYPERION] (DEBUG) (Hyperion.cpp:553:handlPriorityChangedLedDevice()) No source left -> switch LED-Device off
    2020-11-04T18:47:18.056Z [hyperiond LEDDEVICE] (DEBUG) (LedDeviceWled.cpp:150:powerOff())
    2020-11-04T18:47:18.057Z [hyperiond LEDDEVICE] (DEBUG) (ProviderRestApi.cpp:153:put()) PUT: [http://192.168.0.40/json/state] [{"on":false}]
    2020-11-04T18:47:18.058Z [hyperiond BLACKBORDER] (DEBUG) (ImageProcessor.cpp:156:setHardLedMappingType()) set hard led mapping to multicolor_mean
    2020-11-04T18:47:18.182Z [hyperiond LEDDEVICE] (DEBUG) (ProviderRestApi.cpp:182:getResponse()) Reply.httpStatusCode [200]
    2020-11-04T18:47:19.122Z [hyperiond HYPERION] (DEBUG) (PriorityMuxer.cpp:238:setInputImage()) Priority 200 is now active
    2020-11-04T18:47:19.123Z [hyperiond HYPERION] (DEBUG) (PriorityMuxer.cpp:333:setCurrentTime()) Set visible priority to 200
    2020-11-04T18:47:19.126Z [hyperiond HYPERION] (DEBUG) (Hyperion.cpp:550:handlPriorityChangedLedDevice()) priority[200], previousPriority[255]
    2020-11-04T18:47:19.127Z [hyperiond HYPERION] (DEBUG) (Hyperion.cpp:560:handlPriorityChangedLedDevice()) new source available -> switch LED-Device on
    2020-11-04T18:47:19.128Z [hyperiond BLACKBORDER] (DEBUG) (ImageProcessor.cpp:156:setHardLedMappingType()) set hard led mapping to multicolor_mean
    2020-11-04T18:47:19.128Z [hyperiond LEDDEVICE] (DEBUG) (LedDeviceWled.cpp:132:powerOn())
    2020-11-04T18:47:19.129Z [hyperiond LEDDEVICE] (DEBUG) (ProviderRestApi.cpp:153:put()) PUT: [http://192.168.0.40/json/state] [{"on":true}]
    2020-11-04T18:47:19.210Z [hyperiond LEDDEVICE] (DEBUG) (ProviderRestApi.cpp:182:getResponse()) Reply.httpStatusCode [200]
    2020-11-04T18:47:24.924Z [hyperiond HTTPJSONRPC] (DEBUG) (JsonAPI.cpp:85:handleInstanceSwitch()) Previous line repeats 18 times
    2020-11-04T18:47:24.925Z [hyperiond WEBSOCKET] (DEBUG) (WebSocketClient.cpp:30:WebSocketClient()) New connection from ::ffff:192.168.0.100
    2020-11-04T18:47:24.926Z [hyperiond WEBSOCKET] (DEBUG) (JsonAPI.cpp:85:handleInstanceSwitch()) Client '::ffff:192.168.0.100' switch to Hyperion instance 0
    2020-11-04T18:47:27.022Z [hyperiond HTTPJSONRPC] (DEBUG) (JsonAPI.cpp:85:handleInstanceSwitch()) Client '::ffff:127.0.0.1' switch to Hyperion instance 0
    2020-11-04T18:47:28.148Z [hyperiond WEBSOCKET] (DEBUG) (JsonAPI.cpp:1069:handleLoggingCommand()) log streaming activated for client ::ffff:192.168.0.100
    2020-11-04T18:47:28.195Z [hyperiond WEBSOCKET] (DEBUG) (JsonAPI.cpp:1078:handleLoggingCommand()) log streaming deactivated for client  ::ffff:192.168.0.100
    2020-11-04T18:47:57.031Z [hyperiond HTTPJSONRPC] (DEBUG) (JsonAPI.cpp:85:handleInstanceSwitch()) Client '::ffff:127.0.0.1' switch to Hyperion instance 0
    2020-11-04T18:48:14.063Z [hyperiond V4L2:/DEV/VIDEO0] (DEBUG) (V4L2Grabber.cpp:1027:process_image()) Video FPS: 57.93, av. delay: 7ms, good: 3476, bad: 0 (60.00,15)
    2020-11-04T18:49:14.067Z [hyperiond V4L2:/DEV/VIDEO0] (DEBUG) (V4L2Grabber.cpp:1027:process_image()) Video FPS: 59.95, av. delay: 7ms, good: 3595, bad: 2 (60.00,15)
    2020-11-04T18:50:14.067Z [hyperiond V4L2:/DEV/VIDEO0] (DEBUG) (V4L2Grabber.cpp:1027:process_image()) Video FPS: 59.98, av. delay: 7ms, good: 3599, bad: 0 (60.00,15)
    2020-11-04T18:51:14.071Z [hyperiond V4L2:/DEV/VIDEO0] (DEBUG) (V4L2Grabber.cpp:1027:process_image()) Video FPS: 59.97, av. delay: 7ms, good: 3598, bad: 0 (60.00,15)
    2020-11-04T18:52:14.072Z [hyperiond V4L2:/DEV/VIDEO0] (DEBUG) (V4L2Grabber.cpp:1027:process_image()) Video FPS: 59.98, av. delay: 7ms, good: 3598, bad: 1 (60.00,15)
    2020-11-04T18:53:14.076Z [hyperiond V4L2:/DEV/VIDEO0] (DEBUG) (V4L2Grabber.cpp:1027:process_image()) Video FPS: 60.02, av. delay: 7ms, good: 3599, bad: 2 (60.00,15)
    2020-11-04T18:54:14.076Z [hyperiond V4L2:/DEV/VIDEO0] (DEBUG) (V4L2Grabber.cpp:1027:process_image()) Video FPS: 59.98, av. delay: 6ms, good: 3599, bad: 0 (60.00,15)
    2020-11-04T18:55:14.080Z [hyperiond V4L2:/DEV/VIDEO0] (DEBUG) (V4L2Grabber.cpp:1027:process_image()) Video FPS: 60.02, av. delay: 7ms, good: 3599, bad: 2 (60.00,15)
    2020-11-04T18:56:14.081Z [hyperiond V4L2:/DEV/VIDEO0] (DEBUG) (V4L2Grabber.cpp:1027:process_image()) Video FPS: 59.98, av. delay: 6ms, good: 3599, bad: 0 (60.00,15)
    2020-11-04T18:57:14.085Z [hyperiond V4L2:/DEV/VIDEO0] (DEBUG) (V4L2Grabber.cpp:1027:process_image()) Video FPS: 60.00, av. delay: 7ms, good: 3600, bad: 0 (60.00,15)
    2020-11-04T18:58:32.930Z [hyperiond HTTPJSONRPC] (DEBUG) (JsonAPI.cpp:85:handleInstanceSwitch()) Previous line repeats 21 times
    2020-11-04T18:58:32.931Z [hyperiond WEBSOCKET] (DEBUG) (WebSocketClient.cpp:204:sendClose()) send close: 1000
    2020-11-04T18:58:33.184Z [hyperiond WEBSOCKET] (DEBUG) (WebSocketClient.cpp:30:WebSocketClient()) New connection from ::ffff:192.168.0.100
    2020-11-04T18:58:33.185Z [hyperiond WEBSOCKET] (DEBUG) (JsonAPI.cpp:85:handleInstanceSwitch()) Client '::ffff:192.168.0.100' switch to Hyperion instance 0
    2020-11-04T18:59:02.728Z [hyperiond HTTPJSONRPC] (DEBUG) (JsonAPI.cpp:85:handleInstanceSwitch()) Client '::ffff:127.0.0.1' switch to Hyperion instance 0
    2020-11-04T18:59:14.089Z [hyperiond V4L2:/DEV/VIDEO0] (DEBUG) (V4L2Grabber.cpp:1027:process_image()) Previous line repeats 1 times
    2020-11-04T18:59:14.089Z [hyperiond V4L2:/DEV/VIDEO0] (DEBUG) (V4L2Grabber.cpp:1027:process_image()) Video FPS: 59.98, av. delay: 7ms, good: 3599, bad: 0 (60.00,15)
    2020-11-04T19:02:14.093Z [hyperiond V4L2:/DEV/VIDEO0] (DEBUG) (V4L2Grabber.cpp:1027:process_image()) Previous line repeats 2 times
    2020-11-04T19:02:14.094Z [hyperiond V4L2:/DEV/VIDEO0] (DEBUG) (V4L2Grabber.cpp:1027:process_image()) Video FPS: 60.00, av. delay: 7ms, good: 3598, bad: 2 (60.00,15)
    2020-11-04T19:03:14.093Z [hyperiond V4L2:/DEV/VIDEO0] (DEBUG) (V4L2Grabber.cpp:1027:process_image()) Video FPS: 60.00, av. delay: 7ms, good: 3600, bad: 0 (60.00,15)
    2020-11-04T19:03:26.337Z [hyperiond DAEMON] (ERROR) The QTC grabber can not be instantiated, because it has been left out from the build
    2020-11-04T19:03:26.339Z [hyperiond V4L2:/DEV/VIDEO0] (INFO) CEC detection is now enabled
    2020-11-04T19:03:26.339Z [hyperiond V4L2:/DEV/VIDEO0] (DEBUG) (V4L2Grabber.cpp:188:setHdrToneMappingEnabled()) setHdrToneMappingMode to: Disabled
    2020-11-04T19:03:26.340Z [hyperiond V4L2:/DEV/VIDEO0] (DEBUG) (V4L2Grabber.cpp:194:setHdrToneMappingEnabled()) setHdrToneMappingMode replacing LUT
    2020-11-04T19:03:26.340Z [hyperiond V4L2:/DEV/VIDEO0] (DEBUG) (V4L2Grabber.cpp:99:GetSharedLut()) LUT folder location: '/usr/share/hyperion/lut'
    2020-11-04T19:03:26.341Z [hyperiond V4L2:/DEV/VIDEO0] (DEBUG) (V4L2Grabber.cpp:181:setFpsSoftwareDecimation()) setFpsSoftwareDecimation to: 1
    2020-11-04T19:03:26.341Z [hyperiond V4L2:/DEV/VIDEO0] (INFO) Signal detection is now enabled
    2020-11-04T19:03:26.342Z [hyperiond V4L2:/DEV/VIDEO0] (INFO) Signal detection area set to: 0.250000,0.250000 x 0.750000,0.750000
    2020-11-04T19:03:26.342Z [hyperiond V4L2:/DEV/VIDEO0] (INFO) Signal threshold set to: {12, 12, 12}
    2020-11-04T19:03:26.343Z [hyperiond V4L2:/DEV/VIDEO0] (DEBUG) (V4L2Grabber.cpp:1400:setEncoding()) Force encoding (setEncoding): mjpeg (6)
    2020-11-04T19:03:26.343Z [hyperiond V4L2:/DEV/VIDEO0] (DEBUG) (V4L2Grabber.cpp:1405:setEncoding()) Restarting v4l2 grabber
    2020-11-04T19:03:26.343Z [hyperiond V4L2:/DEV/VIDEO0] (DEBUG) (V4L2Grabber.cpp:218:uninit()) uninit grabber: /dev/video0
    2020-11-04T19:03:26.346Z [hyperiond V4L2:/DEV/VIDEO0] (INFO) Stopped
    2020-11-04T19:03:26.348Z [hyperiond V4L2:/DEV/VIDEO0] (INFO) configured v4l device: /dev/video0
    2020-11-04T19:03:26.349Z [hyperiond V4L2:/DEV/VIDEO0] (DEBUG) (V4L2Grabber.cpp:670:init_device()) Set device input to: Camera 1
    2020-11-04T19:03:26.351Z [hyperiond V4L2:/DEV/VIDEO0] (DEBUG) (V4L2Grabber.cpp:784:init_device()) Set resolution to width=640 height=360
    2020-11-04T19:03:26.353Z [hyperiond V4L2:/DEV/VIDEO0] (DEBUG) (V4L2Grabber.cpp:801:init_device()) Set framerate to 60 fps
    2020-11-04T19:03:26.353Z [hyperiond V4L2:/DEV/VIDEO0] (DEBUG) (V4L2Grabber.cpp:99:GetSharedLut()) LUT folder location: '/usr/share/hyperion/lut'
    2020-11-04T19:03:26.353Z [hyperiond V4L2:/DEV/VIDEO0] (DEBUG) (V4L2Grabber.cpp:843:init_device()) Pixel format=MJPEG
    2020-11-04T19:03:26.355Z [hyperiond V4L2:/DEV/VIDEO0] (INFO) Multithreading for V4L2 is enabled. Available thread's count 4
    2020-11-04T19:03:26.360Z [hyperiond V4L2:/DEV/VIDEO0] (INFO) Started
    2020-11-04T19:04:26.365Z [hyperiond V4L2:/DEV/VIDEO0] (DEBUG) (V4L2Grabber.cpp:1027:process_image()) Video FPS: 59.95, av. delay: 7ms, good: 3596, bad: 1 (60.01,15)
    2020-11-04T19:05:26.365Z [hyperiond V4L2:/DEV/VIDEO0] (DEBUG) (V4L2Grabber.cpp:1027:process_image()) Video FPS: 60.00, av. delay: 7ms, good: 3599, bad: 1 (60.00,15)
    2020-11-04T19:06:26.369Z [hyperiond V4L2:/DEV/VIDEO0] (DEBUG) (V4L2Grabber.cpp:1027:process_image()) Video FPS: 60.00, av. delay: 7ms, good: 3598, bad: 2 (60.00,15)
    2020-11-04T19:07:26.370Z [hyperiond V4L2:/DEV/VIDEO0] (DEBUG) (V4L2Grabber.cpp:1027:process_image()) Video FPS: 60.00, av. delay: 7ms, good: 3600, bad: 0 (60.00,15)
    
    I did change some settings after so there's unrelated stuff happening.
     
  12. Awawa

    Awawa Active Member

    Messages:
    228
    Hardware:
    RPi1/Zero, RPi3, +nodeMCU/ESP8266
    Thanks, thats better :)


    Code:
    2020-11-04T18:47:14.062Z [hyperiond V4L2:/DEV/VIDEO0] (DEBUG) (V4L2Grabber.cpp:1027:process_image()) Video FPS: 60.02, av. delay: 7ms, good: 3599, bad: 2 (60.00,15)
    2020-11-04T18:47:18.056Z [hyperiond HYPERION] (DEBUG) (PriorityMuxer.cpp:238:setInputImage()) Priority 200 is now inactive
    2020-11-04T18:47:19.122Z [hyperiond HYPERION] (DEBUG) (PriorityMuxer.cpp:238:setInputImage()) Priority 200 is now active
    2020-11-04T18:48:14.063Z [hyperiond V4L2:/DEV/VIDEO0] (DEBUG) (V4L2Grabber.cpp:1027:process_image()) Video FPS: 57.93, av. delay: 7ms, good: 3476, bad: 0 (60.00,15)
    OK, there was drop for about 120 frames, if they were arrange in sequence it's about 2 seconds.
    If there is no errors in dmesg (voltage dropping, usb device connecting/disconnecting) then it's only guessing because Hyperion didnt receive any errors from v4l2 driver or even corrupted MJPEG frames.
    Maybe it's something with Rpi USB or video buffer in the kernel.
    Try to reduce the framerate to see if something would change.
     
  13. Puck

    Puck Member

    Messages:
    74
    I just checked logs using "dmesg -T" for today and nothing mentioning the USB Grabber at all (nor any errors/warnings whatsover). I'll try lowering the framerate and see if it happens again. Thanks for the advice!
     
  14. Awawa

    Awawa Active Member

    Messages:
    228
    Hardware:
    RPi1/Zero, RPi3, +nodeMCU/ESP8266
    I hope it will help. Maybe there is other program on linux to record camera/grabber and test FPS for that situation and exclude/confirm that's a hardware or linux case?
    BTW I dont know what's your display but for capturing 640x480 is not optimal for TV and ambilight. 1280x720 has much better aspect both for 1080p and 4k TV.
     
  15. Puck

    Puck Member

    Messages:
    74
    I set it to the lowest resolution in correct aspect ratio: 640x360 (so it's not set to 640x480) since I figured a higher resolution wouldn't really give me be better results due to amount of LEDs being (way) less.
     
  16. Awawa

    Awawa Active Member

    Messages:
    228
    Hardware:
    RPi1/Zero, RPi3, +nodeMCU/ESP8266
    My bad, I misread your log. Lower resolution has very bad effect for the MJPEG at least that's my experience with Ezcap. That's doesn't apply for YUYV encoding.
     
  17. Puck

    Puck Member

    Messages:
    74
    I see no artefacts whatsoever in the preview, and don't notice anything weird on LEDs either so far. Not sure what to look out for though. Unfortunately this grabber doesn't support YUYV. I'll see if raising it causes any performances issues. Seems my Pi 4 can handle it all pretty well performance wise anyway.
     
  18. Awawa

    Awawa Active Member

    Messages:
    228
    Hardware:
    RPi1/Zero, RPi3, +nodeMCU/ESP8266
    Maybe it's a hardware related. For Ezcap 269 mjpeg artifacts were very noticeable for me and caused strange effects on some scenes. High resolutions helped but not for 100%.
     
    • Like Like x 1
  19. Paulchen-Panther

    Paulchen-Panther Moderator Staff Member Developer

    Messages:
    901
    Hardware:
    RPi1/Zero, RPi3, 32/64bit, +Arduino, +nodeMCU/ESP8266
    @Awawa
    Why do I get this error?
    Code:
    <ERROR> Could not open device (MFCreateDeviceSource -2147024774)
    
     
  20. Awawa

    Awawa Active Member

    Messages:
    228
    Hardware:
    RPi1/Zero, RPi3, +nodeMCU/ESP8266
    ERROR_INSUFFICIENT_BUFFER first time I meet this. This is first step of device initialization before all the configuration stuff.