Search found 177 matches

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by lukas
27 Nov 2020, 10:44
Forum: Hardware
Topic: RevPi Compact EERAM
Replies: 4
Views: 541

Re: RevPi Compact EERAM

Forgot to mention, support for the EERAM was added after the Stretch 6/2020 image was released. My former colleagues at Kunbus haven't pushed a new release of the raspberrypi-kernel package to the apt-repository since then. Until they do that, you need to build your own kernel with kernelbakery . So...
by lukas
26 Nov 2020, 16:11
Forum: Hardware
Topic: RevPi Compact EERAM
Replies: 4
Views: 541

Re: RevPi Compact EERAM

I've documented the EERAM's usage internally but apparently that part of the documentation hasn't found its way to the Compact Tutorials page yet: Briefly, the EERAM is exposed as a generic file called /sys/bus/nvmem/devices/1-00500/nvmem. You just need to open/read/write/close this file. Anything w...
by lukas
18 Nov 2020, 11:40
Forum: Hardware
Topic: spidev0.0 on RevPi Connect+ does not transmit and receive the same information
Replies: 7
Views: 651

Re: spidev0.0 on RevPi Connect+ does not transmit and receive the same information

The Con CAN option in webstatus merely loads a devicetree overlay which instantiates the CAN slave below the SPI master (and sets the status of the spidev slave to "disabled"). This looks like the RX line is pulled high. I'd suggest to double-check the wiring and verify whether the correct...
by lukas
11 Nov 2020, 12:54
Forum: Hardware
Topic: About the Interface of RevPie Compact
Replies: 4
Views: 687

Re: About the Interface of RevPie Compact

First picture shows the camera port. Second picture shows the Micro-USB port to access the eMMC. The camera port uses an HDMI connector to transmit CSI signals. To use it, you need: Raspberry Pi Camera ( HQ or V2 or NoIR V2 ) Pi Camera HDMI Cable Extension (adapts CSI signals to HDMI interface) HDMI...
by lukas
01 Sep 2020, 14:40
Forum: Software
Topic: 2x RevPi Core via PiBridge
Replies: 8
Views: 1258

Re: 2x RevPi Core via PiBridge

How about configuring netfilter rules to set up a firewall on the PiBridge Ethernet? You should also be able to talk to a neighboring Core with RS485 by opening /dev/ttyAMA0 on each of them with miniterm or something like that. Instead of cutting away the Ethernet pins, you can just shut down the pi...
by lukas
01 Sep 2020, 12:08
Forum: Software
Topic: 2x RevPi Core via PiBridge
Replies: 8
Views: 1258

Re: 2x RevPi Core via PiBridge

Yes that is possible, there are some brief notes in the stretch 3/2019 release announcement (search for "PiBridge networking"). Basically you need to comment out piControl in /etc/modules, connect the two Cores with a PiBridge plug and boot them. They will assign themselves IP addresses in...
by lukas
26 Aug 2020, 05:51
Forum: Hardware
Topic: RevPi Connect ttyRS485 device not found
Replies: 1
Views: 545

Re: RevPi Connect ttyRS485 device not found

I agree that it looks like a hardware issue. Devices on the USB bus are auto-discovered. If they don't show up, they're likely dead. Question is, did this happen out of the blue or was the chip somehow fried by feeding a too-high voltage through the RS485 port? The FTDI chip isn't connected directly...
by lukas
24 Aug 2020, 17:34
Forum: Software
Topic: RevPi Core 3+ / Python / Thonny / Tastaturpuffer "lagt"
Replies: 6
Views: 1094

Re: RevPi Core 3+ / Python / Thonny / Tastaturpuffer "lagt"

Ja, genau. Ich habe sie schließlich dazu gebracht, das zu fixen (siehe hier ) und sie haben's natürlich erstmal bezweifelt, wollten "evidence" sehen. Nachdem sie dann die Warnung beim Booten entdeckten, haben sie's geglaubt. Sie haben dann ein neues Paket vom Bootloader released, aber nur ...
by lukas
18 Aug 2020, 20:04
Forum: Hardware
Topic: MODBUS RTU: any way to adjust time outs?
Replies: 7
Views: 1226

Re: MODBUS RTU: any way to adjust time outs?

I have a MODBUS RTU Master in my RevPi connect, with only 5 actions defined. There is 3 slaves attached, the wiring is all twisted Pair CAT5 via a distribution PCB and short stubs of like 20cm to each device. Total cable length is around 1m estimated. The bus is terminated at the RevPi and on the d...
by lukas
08 Aug 2020, 21:43
Forum: Software
Topic: TeamViewer Signatur abgelaufen
Replies: 10
Views: 2951

Re: TeamViewer Signatur abgelaufen

Wenn wir das machen würden und der Benutzer löscht das teamviewer-revpi Paket, dann kann er es nicht mehr re-installieren. Weil die Paketquelle nicht mehr bekannt ist. Genau aus dem Grund ist es auch Unsinn, dass die Paketquelle in dem teamviewer-revpi Paket drin ist.
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