Switched to firmware version 1b393e4_2020-11-02 comms errors

Hardware diyBMS
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I switched to firmware version 1b393e4_2020-11-02
I downloaded the new firmware version only in 2 modules and already got strange behavior.
Packets stop arriving periodically. Reboot helps for 4-15 packets. What could be wrong?

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Did you update the controller code as well? (And upload file system image)

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Yes. Where did I get the firmware version from then?
I completely cleared my memory that I had to re-configure the wifi

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Now the situation is like this

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Did you have the CRC errors before the update? This should always be zero.

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Not so many. Because of what they are?

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CRC errors are indicative of communications errors - normally due to bad connections and/or electrical interference.

So you have two options if you are still seeing problems;

  1. Continue and flash all the modules and see if that resolves the problem
  2. Go back a version on GITHUB and reflash that version - although the latest version doesn’t alter the way the communications code works, so I don’t know what that appeared to introduce comms issues
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It can be a problem (RX) of wire twisted pair 90cm long?

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If you are already using twisted pair cables then that should be okay 90cm is long though, do you have a photo of the install? The modules should be as close to the battery cells as possible (short power leads).

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IMG_20201106_180535
IMG_20201106_1805354608×3456 1.53 MB
IMG_20201106_180544
IMG_20201106_1805444608×3456 1.94 MB
IMG_20201106_180559
IMG_20201106_1805593456×4608 1.36 MB

Perhaps the problem is not in receiving packets, but in their transmission? Whether it is true that the inscription tx means that the controller has sent a packet, but whether it has received it or not, it does not know. Can USBASP be turned on in monitoring mode on module 0 and understand if a packet is coming? Or does a green LED indicate that the module has received a packet? Maybe he got the package already broken? Why should there be short power wires for battery models?

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Solved!
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The problem was the power supply. These contacts are probably not designed for high currents. Connected temporary power supply via USB. Why not provide a separate on-board power input for power supply, so as not to occupy the USB

1 Like
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Yes, I’ll include this on the next controller board version.

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When the green LED flashes, it means a packet was received, correctly processed and sent on.