Frequent connection losts with homeduino after upgrade raspbian

[edautz]

I am using a rpi with a USB stick for storage after my SD card went bad.

Sometimes I lost connection to homeduino. I had to restart pimatic (0.8.66, homeduino 0.8.50) to get things working again.

After upgrading Raspbian from

Linux raspberrypi 3.12.28+ #709 to Linux raspberrypi 3.18.7+ #755 and update homeduino to 0.8.51, this problem occurred three times this night.

015-04-28 05:30:58warn [pimatic-homeduino]: Couldn't connect (operation timed out), retrying...
03:30:13warn [pimatic-homeduino]: Couldn't connect (operation timed out), retrying...
01:29:31warn [pimatic-homeduino]: Couldn't connect (operation timed out), retrying.

Debug data from the first time:

01:54:52debug [pimatic-homeduino]: data: "PING"
01:49:52debug [pimatic-homeduino]: data: "PING"
01:44:52debug [pimatic-homeduino]: data: "PING"
01:39:52debug [pimatic-homeduino]: data: "PING"
01:34:52debug [pimatic-homeduino]: data: "PING"
01:29:32debug [pimatic-homeduino]: data: "PING"
01:29:32debug [pimatic-homeduino]: data: "ready"
01:29:31debug [pimatic-homeduino]: data: "PING"
01:29:31warn [pimatic-homeduino]: Couldn't connect (operation timed out), retrying...
01:24:02debug [pimatic-homeduino]: data: "ACK 20.4 50.8"
01:19:02debug [pimatic-homeduino]: data: "ACK 20.4 50.9"
01:14:02debug [pimatic-homeduino]: data: "ACK 20.4 50.9"
01:09:02debug [pimatic-homeduino]: data: "ACK 20.5 51.1"

[leader21]

First of all I would suggest not to use an USB stick. It's the same technology as sd cards with flash memory. If using am external storage go for a USB hdd or flash disk.

Regarding your above issue, can you tell us what serial chip your arduino has? ftdi or ch340?
did you restore a full backup with the older Linux kernel 3.12 and still working on that version or did you update now to 3.18?

[edautz]

The chip on the Nano has the following text printing on it:
Atmel Mega328P AU 1435.

I have updated my kernel to Linux raspberrypi 3.18.7+ #755

[edautz]

I found in my syslog files:

Apr 27 22:05:52 raspberrypi kernel: [ 11.377624] ch341 1-1.3:1.0: ch341-uart converter detected

[edautz]

Tried several things:
Other powersupplies
Several updates of Raspbian
Latest Homeduino sketch

But nothing worked. At the end error homeduino connection lost, occured almost every 2 hours constantly.

Reverted to old kernel 3.12.28.Had to delete the Sqllite database otherwise pimatic wouldn't start. Database of 200 Gb.

Now everything runs flawless for 4 days now.

[sweetpi]

@edautz Thanks for the feedback and problem solution. Damn trouble with the new kernels.

[edautz]

Updated RPI B+ to RPi3, Pimatic 0.9 and al the software upgrade that go aling with it. This issue isn't relevant anymore.