Go to advanced search

by nomdediot
Fri Jan 17, 2020 7:24 am
Forum: Compute Module
Topic: PI 4 Compute module with pci-e?
Replies: 73
Views: 36577

Re: PI 4 Compute module with pci-e?

mc_hof, I think you do not consider all the costs this can introduce. Cm are for the industry. Changing the pcb is not a long job with a similar connector. But then - stock of previous version is lost - testing tools are to be reworked - new reference is to be managed - maintenance and repair of pre...
by nomdediot
Fri Jan 10, 2020 7:19 am
Forum: Device Tree
Topic: Using DSI or CSI for another purpose?
Replies: 18
Views: 1037

Re: Using DSI or CSI for another purpose?

Okk so to summarize, the csi and dsi on the pi are differential lines, explaining why they do not provide pin muxing. I call this a good reason to say we cannot use them for another purpose.

Exception with i2c interface of the hdmi which can be used for something else with the right config.
by nomdediot
Tue Jan 07, 2020 11:15 pm
Forum: Device Tree
Topic: Using DSI or CSI for another purpose?
Replies: 18
Views: 1037

Re: Using DSI or CSI for another purpose?

Made a mistake, not Allwinner, but Broadcom.

Ok for the I2C on the HDMI interface, thanks.
by nomdediot
Tue Jan 07, 2020 9:32 pm
Forum: Device Tree
Topic: Using DSI or CSI for another purpose?
Replies: 18
Views: 1037

Re: Using DSI or CSI for another purpose?

First of all thanks for all the answers! I will try to comment for each of them below. To introduce myself: I'm not a usual raspberry pi user and i'm not used to look or respond on the forum. I have read some topics and answered to some trivial of them recently, that's all. I'm an embedded electroni...
by nomdediot
Tue Jan 07, 2020 8:27 am
Forum: Device Tree
Topic: Using DSI or CSI for another purpose?
Replies: 18
Views: 1037

Re: Using DSI or CSI for another purpose?

I would like to have an "official" confirmation, on which information do you base your answer?
by nomdediot
Tue Jan 07, 2020 7:31 am
Forum: Device Tree
Topic: Using DSI or CSI for another purpose?
Replies: 18
Views: 1037

Using DSI or CSI for another purpose?

Hi I wonder if it s possible to use csi or dsi interfaces for another purpose using specific device tree? I not sure the SOC is pin configurable there? I m currently making a specific product with cm3+ and routing is a little bit difficult due to the position of the pins. Moving some GPIO or I2c for...
by nomdediot
Sun Jan 05, 2020 12:51 pm
Forum: HATs and other add-ons
Topic: Which Power solution for a several sensors project?
Replies: 13
Views: 740

Re: Which Power solution for a several sensors project?

I had some troubles and instability few days ago with my raspberry pi because I was using a chip power adapter. I just changed the adapter to solve all my issues. Which kind of supply are you using ? However, many docker containers on your pi is also not very recommended, try simplify the software, ...
by nomdediot
Sat Jan 04, 2020 7:39 pm
Forum: HATs and other add-ons
Topic: Which Power solution for a several sensors project?
Replies: 13
Views: 740

Re: Which Power solution for a several sensors project?

You currently supply the sensors from 5V or 3.3V, not from the GPIO themselves which are only used to provide sensor status. Thus, no current is drawn from the GPIO to supply the sensor. Your wiring is what you have to do no modification required. What is the problem on your system with the power co...
by nomdediot
Sat Jan 04, 2020 2:24 pm
Forum: Automation, sensing and robotics
Topic: Electronics for an indoor plant automation system
Replies: 9
Views: 661

Re: Electronics for an indoor plant automation system

About the power supply, don't worry, you can supply with the same one. Just need a regulator to convert 12V to 5V to supply the Pi. Do not apply 12V to the Pi directly, you will destroy it. About the switch, I'm not sure what you want to do but I think you can simply add it in parallel to the contac...
by nomdediot
Sat Jan 04, 2020 2:21 pm
Forum: HATs and other add-ons
Topic: Which Power solution for a several sensors project?
Replies: 13
Views: 740

Re: Which Power solution for a several sensors project?

About CPU usage, clearly your choice are not recommended at all. Why using docker ? You should just install your scripts/applications on the Pi itself. Simple and efficient. Just try and compare CPU usage, I'm sure you will be surprised ! About the Power Consumption, it's not very clear, can you pro...
by nomdediot
Sat Jan 04, 2020 7:41 am
Forum: Beginners
Topic: Does the Raspberry Pi 2 is able to drive the DM542T stepper driver
Replies: 4
Views: 240

Re: Does the Raspberry Pi 2 is able to drive the DM542T stepper driver

Arduino outputs are 0-5v while rpi is only 0-3.3v. Maybe it s the reason?
You should check with the driver if 3.3v is accepted, else you can increase output voltage with a voltage translator ic.

Else I see no reason why the pi can t drive it.
by nomdediot
Sat Jan 04, 2020 7:37 am
Forum: 日本語
Topic: ラズパイからweb上のデータ値を取得する方法
Replies: 3
Views: 461

Re: ラズパイからweb上のデータ値を取得する方法

You should write in English if you expect to have an answer!
by nomdediot
Sat Jan 04, 2020 7:35 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: connect 5 arduinos to raspberry pi 4 or 3 via uart at the same time
Replies: 1
Views: 518

Re: connect 5 arduinos to raspberry pi 4 or 3 via uart at the same time

The rpi has not enough serial.
You should consider i2c for example if the wiring is not to long, or rs485.
Depending of the sensors maybe you can also connect them to the pi directly, without arduino.
by nomdediot
Sat Jan 04, 2020 7:31 am
Forum: Networking and servers
Topic: Self-hosted, NAT-friendly IoT fleet management?
Replies: 10
Views: 534

Re: Self-hosted, NAT-friendly IoT fleet management?

Already worked on this kind of project, using some https request instead of ws socket, but basically the same idea. We made custom request and response to have information from the système (online, internal statuses, and specific responses to opn ssh tunneling with user and password given in the res...
by nomdediot
Fri Jan 03, 2020 6:29 pm
Forum: Automation, sensing and robotics
Topic: Using I2C with a Gyroscope and Speaker Phat
Replies: 1
Views: 435

Re: Using I2C with a Gyroscope and Speaker Phat

I2c devices all have an address on the bus. It s possible to have many devices on the same bus if they Don t have the same address. The address is usually hardware coded. It s 0x54 for your speaker hat and 0x68 or 0x69 (configurable) for the mpu6050. Conclusion : you can connect and use both on the ...
by nomdediot
Fri Jan 03, 2020 6:17 pm
Forum: HATs and other add-ons
Topic: Which Power solution for a several sensors project?
Replies: 13
Views: 740

Re: Which Power solution for a several sensors project?

Seems you mix several things : cpu usage and power supply requirements. First i'm surprised rpi3 can t make this application, it s not so complicated and if you have cpu issues you should work on the software. Then, about power supply, you should avaluate how many power each of them require. Plus rp...
by nomdediot
Fri Jan 03, 2020 6:08 pm
Forum: Automation, sensing and robotics
Topic: Electronics for an indoor plant automation system
Replies: 9
Views: 661

Re: Electronics for an indoor plant automation system

Pump: 12v, 1a = 12W Light: 12v, 4.5W Relay and rpi : not a lot of consumption, do not care Total 16.5w Supply can deliver up to 24w => OK! The wiring seems good. You can power the rpi with the 12v supply adding a regulator. Small voltage and low power, isolated from the main suply, no specific need ...
by nomdediot
Fri Jan 03, 2020 5:57 pm
Forum: General discussion
Topic: Cannot ping to board
Replies: 4
Views: 240

Re: Cannot ping to board

You can also make a tcp dump and analyse it with Wireshark to check network issues. Dns, routing etc many cause possible.
Wireshark is great tool to analyse network issues.
by nomdediot
Fri Jan 03, 2020 11:42 am
Forum: Compute Module
Topic: Fastest way to flash CM3+ for Production
Replies: 19
Views: 1449

Re: Fastest way to flash CM3+ for Production

Thanks Gordon! Mikemoy the same tools can be used to flash the internal emmc from an SD card connected to GPIO 22 to 27. I also think the USB connection can be used to mount a virtual etherNet interface (Linux USB gadget) to flash throw etherNet, report auto test, serial etc easily to the host compu...
by nomdediot
Fri Jan 03, 2020 11:05 am
Forum: Compute Module
Topic: Fastest way to flash CM3+ for Production
Replies: 19
Views: 1449

Re: Fastest way to flash CM3+ for Production

Yes another FET in series with the first one should work, with the correct pull up to enable slave connection by default.

What about the script on the server?
by nomdediot
Fri Jan 03, 2020 10:59 am
Forum: Compute Module
Topic: Bare minimum - Compute module startup
Replies: 1
Views: 448

Re: Bare minimum - Compute module startup

I m doing the same job, I see you are using kicad too! Difference with my board I can are only: - VBAT supply, I m using 5v like on the cmio. However the data sheet indicates should run with 3.3v so OK probably but maybe you can check with 5v? - emmc disable circuit not present at all on your schema...
by nomdediot
Fri Jan 03, 2020 10:52 am
Forum: Compute Module
Topic: Conxion sd card to module computer CM3+
Replies: 7
Views: 723

Re: Conxion sd card to module computer CM3+

With cm3 and cm3+ you can also extend the storage with an external SD card connected to GPIO 22 to 27. See also https://www.raspberrypi.org/forums/view ... 8&t=257309
by nomdediot
Fri Jan 03, 2020 10:37 am
Forum: Compute Module
Topic: Fastest way to flash CM3+ for Production
Replies: 19
Views: 1449

Re: Fastest way to flash CM3+ for Production

I don t know if it is interesting for you mikemoy but it s a good alternative too. Just plug etherNet and OTG for a while then move OTG to next module while the flashing process is done throw the network. Gordon, I have search schematic for that, but not found. Is it available? At least the USB part...
by nomdediot
Fri Jan 03, 2020 10:10 am
Forum: Compute Module
Topic: PI 4 Compute module with pci-e?
Replies: 73
Views: 36577

Re: PI 4 Compute module with pci-e?

Haven t read all the thread but just to add some pieces : - industry will need a solution when cm3 will not be available any more - size of sodimm200 module is great for many small designs where the available space is limited - current compute module has NC pins and also optional SDx pins Maybe 2 ne...
by nomdediot
Fri Jan 03, 2020 9:44 am
Forum: Compute Module
Topic: Fastest way to flash CM3+ for Production
Replies: 19
Views: 1449

Re: Fastest way to flash CM3+ for Production

Gordon, interesting solution using the network, but how do you access etherNet interface (which is on USB port throw LAN951x usually) and USB OTG at the same time to use rpiboot?

Go to advanced search