Getting Check wire error, yet both devices are talking to each other.



  • Hi,

    I've currently got a very basic setup.

    1. Serial gateway connected to Raspberry Pi 2 running Domoticz using the standard Gateway Sketch available on this site.
    2. Arduino Nano Clone with nRF24L01 connected to some WS2812B (102 of them infact) via Pin 6 using the Sketch found in this post.

    The problem is that after a while i get the Check Wires error when trying to change the colour or turn the RGB Strip off.

    I have connected the RGB Strip arduino to the Raspberry pi for debugging so i can watch the output of both devices.

    Here's the output that i logged when trying to change the Strip

    Gateway:

    [Change Brightness]
    0;0;3;0;9;send: 0-0-254-254 s=0,c=1,t=3,pt=0,l=2,sg=0,st=ok:37
    0;0;3;0;9;read: 254-254-0 s=0,c=1,t=3,pt=0,l=2,sg=0:37
    254;0;1;1;3;37
    0;0;3;0;9;read: 254-254-0 s=0,c=1,t=24,pt=0,l=11,sg=0:00FBFF&94&1
    254;0;1;0;24;00FBFF&94&1
    0;0;3;0;9;send: 0-0-254-254 s=0,c=1,t=3,pt=0,l=2,sg=0,st=ok:37
    0;0;3;0;9;read: 254-254-0 s=0,c=1,t=3,pt=0,l=2,sg=0:37
    254;0;1;1;3;37
    0;0;3;0;9;read: 254-254-0 s=0,c=1,t=24,pt=0,l=11,sg=0:00FBFF&94&1
    254;0;1;0;24;00FBFF&94&1
    0;0;3;0;9;send: 0-0-254-254 s=0,c=1,t=2,pt=0,l=1,sg=0,st=ok:0
    0;0;3;0;9;read: 254-254-0 s=0,c=1,t=2,pt=0,l=1,sg=0:0
    254;0;1;1;2;0
    0;0;3;0;9;read: 254-254-0 s=0,c=1,t=24,pt=0,l=11,sg=0:00FBFF&94&0
    254;0;1;0;24;00FBFF&94&0
    
    
    
    
    
    [Switch Off]
    0;0;3;0;9;send: 0-0-254-254 s=0,c=1,t=2,pt=0,l=1,sg=0,st=ok:0
    0;0;3;0;9;read: 254-254-0 s=0,c=1,t=2,pt=0,l=1,sg=0:0
    254;0;1;1;2;0
    0;0;3;0;9;read: 254-254-0 s=0,c=1,t=24,pt=0,l=11,sg=0:00FBFF&94&0
    254;0;1;0;24;00FBFF&94&0
    
    
    [Switch On]
    0;0;3;0;9;send: 0-0-254-254 s=0,c=1,t=2,pt=0,l=1,sg=0,st=ok:1
    0;0;3;0;9;read: 254-254-0 s=0,c=1,t=2,pt=0,l=1,sg=0:1
    254;0;1;1;2;1
    0;0;3;0;9;read: 254-254-0 s=0,c=1,t=24,pt=0,l=11,sg=0:00FBFF&94&1
    254;0;1;0;24;00FBFF&94&1
    

    RGB Strip

    [Change Brightness]
    read: 0-0-254 s=0,c=1,t=3,pt=0,l=2,sg=0:37
    send: 254-254-0-0 s=0,c=1,t=3,pt=0,l=2,sg=0,st=ok:37
    send: 254-254-0-0 s=0,c=1,t=24,pt=0,l=11,sg=0,st=ok:00FBFF&94&1
    read: 0-0-254 s=0,c=1,t=3,pt=0,l=2,sg=0:37
    send: 254-254-0-0 s=0,c=1,t=3,pt=0,l=2,sg=0,st=ok:37
    send: 254-254-0-0 s=0,c=1,t=24,pt=0,l=11,sg=0,st=ok:00FBFF&94&1
    read: 0-0-254 s=0,c=1,t=2,pt=0,l=1,sg=0:0
    send: 254-254-0-0 s=0,c=1,t=2,pt=0,l=1,sg=0,st=ok:0
    send: 254-254-0-0 s=0,c=1,t=24,pt=0,l=11,sg=0,st=ok:00FBFF&94&0
    
    
    
    [Switch Off]
    read: 0-0-254 s=0,c=1,t=2,pt=0,l=1,sg=0:0
    send: 254-254-0-0 s=0,c=1,t=2,pt=0,l=1,sg=0,st=ok:0
    send: 254-254-0-0 s=0,c=1,t=24,pt=0,l=11,sg=0,st=ok:00FBFF&94&0
    
    
    [Switch On]
    read: 0-0-254 s=0,c=1,t=2,pt=0,l=1,sg=0:1
    send: 254-254-0-0 s=0,c=1,t=2,pt=0,l=1,sg=0,st=ok:1
    send: 254-254-0-0 s=0,c=1,t=24,pt=0,l=11,sg=0,st=ok:00FBFF&94&1
    

    Am i correct in thinking that this is more likely an issue with the RGB Strip? Or the wiring to it anyway? if the Devices are talking to each other i cant see what else it might be?

    Thanks.

    Adam


  • Mod

    How are you powering the LEDs? They are very power hungry and might affect the power supply to the Arduino and the radio. From this source: "Each RGB LED draws approximately 50 mA when it is set to full brightness and powered at 5 V. This means that for every 30 LEDs you turn on, your LED strip could be drawing as much as 1.5 A. Be sure to select a power source that can handle your strip’s current requirements."
    So for your 102 LEDs you'll need 5.1A at full brightness.

    Try using a really low brightness, power from a separate power source and add a capacitor to stabilize the power supply.



  • They are driven by a separate 5v 10amp power supply. originally i was using this to power the Arduino but i'm now using USB to debug the connection.


  • Mod

    Alright, then the power shouldn't be a problem :-)



  • no, i've got a capacitor bridging the NRF module Power feed too to stabilise the power to that.

    I'll keep an eye on the ser2net feed and see if there anything untoward happening!


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