Search found 186 matches
- 15 Jun 2020, 12:18
- Forum: Hardware
- Topic: RevPi failed to get modem status
- Replies: 17
- Views: 12999
Re: RevPi failed to get modem status
If you add "coherent_pool=4M" to /boot/cmdline.txt, does the issue go away? We've made that the default in our upcoming 4.19 kernel. I gather from the log output that USB communication is failing. That's a known problem if many USB devices are attached and the DMA coherent pool is too smal...
- 10 Jun 2020, 10:25
- Forum: Hardware
- Topic: RevPi Core 3 *.img to RevPi Connect+
- Replies: 8
- Views: 7337
Re: RevPi Core 3 *.img to RevPi Connect+
we have also switched from RevPi Core 3+ to a RevPi Connect+. I tried to flash the image from the old to the new controller. For some reason, that did not work directly. I looked around and fount out that the Connect stops with the message "failed to start remount root and kernel file system&q...
- 09 Jun 2020, 15:21
- Forum: Hardware
- Topic: Raspberry pi camera?
- Replies: 5
- Views: 5671
Re: Raspberry pi camera?
We'll introduce a new product real soon now called RevPi Compact which allows attaching a Raspberry Pi Camera.
Alternatively, a regular USB2 camera should do the trick.
Alternatively, a regular USB2 camera should do the trick.
- 09 Jun 2020, 15:18
- Forum: RevPiModIO
- Topic: Fehlermeldung: No such file or directory: '/dev/piControl0
- Replies: 5
- Views: 5622
Re: Fehlermeldung: No such file or directory: '/dev/piControl0
/dev/piControl0 existiert nur, wenn auf der Maschine das Kernel-Modul piControl läuft. Wahrscheinlich wurde dein Programm nicht auf dem RevPi, sondern auf deiner lokalen Entwicklungsmaschine ausgeführt. Oder piControl läuft aus irgendeinem Grund nicht, zum Beispiel wenn du es auf deinem RevPi in /et...
- 09 Jun 2020, 15:14
- Forum: Hardware
- Topic: About the capacitor
- Replies: 4
- Views: 3740
Re: About the capacitor
That's the supercapacitor powering the RTC. The supercap will sustain the RTC's clock for a couple of hours when the RevPi is not connected to a power supply.
- 09 Jun 2020, 15:11
- Forum: Software
- Topic: WLAN mit Edimax-Antenne
- Replies: 11
- Views: 10560
Re: WLAN mit Edimax-Antenne
Hallo Dennis, Hallo Nicolai, bitte entschuldigt die verzögerte Antwort. 1) Warum sind die Kernel-Scripte nicht bereits vorkompiliert, wie es beim RevPi der fall ist? (Fehler scripts/basic/fixdep: not found ) Das liegt daran, dass wir den Kernel auf x86 cross-compilieren. Das kbuild System vom Kernel...
- 09 Jun 2020, 14:50
- Forum: Software
- Topic: Building USB2CAN driver fails
- Replies: 3
- Views: 4607
Re: Building USB2CAN driver fails
Hi porteous, thanks for the suggestion and apologies for the belated reply. The problem is that we cross-compile the kernel on x86. (Compiling on a RevPi would be too slow.) The kernel's build system only builds tools like "fixdep" for the host architecture on which the compiler runs. It d...
- 04 Jun 2020, 08:36
- Forum: Software
- Topic: pimodbus-master.service failed
- Replies: 28
- Views: 18080
Re: pimodbus-master.service failed
I found some first hints. The service is located in "/lib/systemd/system/" It is not restarting upon failure, so I added "Restart=on-failure" to "Service". I guess that makes sense, so I've added it to the service files of both piModbusMaster and piModbusSlave. This ch...
- 03 Jun 2020, 19:36
- Forum: Software
- Topic: Default Password for QEMU image
- Replies: 1
- Views: 6256
Re: Default Password for QEMU image
Username "pi", password "raspberry". On first login you'll be prompted to enter the serial number, MAC address and product type. You can skip this step by pressing ^C and you can avoid it on future logins with "touch /home/pi/.revpi-factory-reset". (The mechanism is par...
- 01 Jun 2020, 13:07
- Forum: Software
- Topic: webpage password not working
- Replies: 9
- Views: 8247
Re: webpage password not working
Code: Select all
piSerial -p