Topics created by openhardware.io

Incredible. The "yeah it's a hobby" terrain has been left far behind.

I'm not familiar with the project that inspired this one, but you should pay attention to hot spots, heat should be equally spread across the whole plate. plus you should have good sensors and provide controllable configuration of heat points for soldering different components according to the manufacturer's datasheet.

@NeverDie Based on my simulation and testing it's not a problem, yet I can look at it and check it's transient response.

Here's a similar project: https://www.openhardware.io/view/268/Arduino-Pro-Mini-Shield-for-RFM69HW

Well, I was able to artificially raise the CTS line, which is active low, and halt the transmissions, so I don't think the problem is with the UARTE on the nRF52x. Rather, I think the problem may be with how virtual com ports are handled on PC's, and maybe they aren't configured to properly use RTS and CTS for flow control. At any rate, I was able to crank the UARTE transmission speed all the way up to 941176 baud, and at that speed it takes only a very small artificial delay (around 300usec) after each transmitted string to avoid problems, so I'm just going to do that and move on rather than chase down how to get perfect RTS/CTS working on a PC's virtual com port. So, for that reason, this PCB project will still have value when its finished by keeping the "wiring" all within a single PCB rather than strewn about externally with a rat's nest of actual wires.

The short answer is no. Regular battery chargers are designed to deliver higher constant voltage to the battery charging it much faster, however the trickle chargers deliver a slow charge to your battery and are designed to be left on your battery for extended periods of time.

@alphaHotel said in Version 3.0 atmega328p test platform: @NeverDie Awesome. thanks. I uploaded the files for version 3.0, including the KiCad 6.0 project archive as a .zip file contained within the .rar file. As it has already served its purpose for me, I didn't meddle with the spacing on the batteries, but I did go out of my way to avoid possible short-circuits between the battery holder and traces on the PCB. Enjoy!

https://hackaday.com/2021/07/05/diy-air-quality-sensor/

I've been experimenting with PCB design the last few weeks. I'm currently using an Arduino Uno as my Gateway with everything mounted on a breadboard and dupont cables. As it doesn't have the waf factor I promised my better half to make a nice enclosure for it, but for that I had to create a shield. This one is for my NRF24L01+ network. My latest sensors all work on RFM96 with the MySensors Gateway. But as you can order it almost fully mounted I think it's a nice entrance level solution for those who want to start with MySensors without having all the problems I've seen on this forum. You simple mount the shield - maybe solder the radio - upload the code and you're got to go in 10 - 20 minutes.

https://web.archive.org/web/20201201193332/https://github.com/aetas/mqgateway might be somewhat useful

@Ron said in Capacitive Soil Moisture Sensor: @Puneit-Thukral Thanks. I am not quite sure, so correct me please if I am wrong, but I think I am already using the MiniCore bootloader with platformIO. Or do I need to configure to explicitly use the MiniCore bootloaders? Also I have set BOD to disabled as I read somewhere that no BOD can also save battery. hi I'm not sure, but I believe I'm already using the MiniCore bootloader with platformIO. Please tell me if I'm incorrect. Is it necessary to set the MiniCore bootloaders explicitly?

I'm looking for a person to collaborate on writing an FW for the UMI6R2 board in the Arduino IDE.

@NeverDie said in LCDUINO: the LCD components don't appear to be named, not even on the schematic Looks like a typical text LCD like 1602 on the picture.

@kimot Thank you for your comment & tips.

@openhardware-io Hi, the link you gave in your description isn't working: "One pack of Greenstar replacement rollers https://www.hagebau.de/p/renovo-ersatzwalzen-greenstar-6-cm-3-stueck-anHG_PROD_4046806013680/ Costs: 3,99 €" I did find the following, though the price is different from what you reported, and it looks different than what's in your photo: https://www.hagebau.de/p/renovo-farbwalze-greenstar-25-cm-12-mm-florhoehe-weiss-gruen-blau-anP7000129076/?searchType=devided&q=greenstar rollers&itemId=B1072454 Are you actually unwinding the nap of a paint roller and using it in your machine as a dust remover?

added support for E-Ink DES to the project. Further test in the refrigerator

Most likely you are right, nevertheless, all my simple devices are working correctly, the only problem that I have encountered is a problem when flashing some controllers through the USBASP.

https://hackaday.io/project/178235-mini-thermometer-hygrometer-with-e-paper-on-nrf5

Oh, I never even thought of that as a possibility. I really like KiCad, and it's my preference. For a while I had Eagle for work, but even then I still preferred KiCad whenever I was given a choice.

Nice project!

Looks great! Very nice integration with the box you found. Keep up the good work.

Needs a BOM.

Thanks for sharing. I have the same monitor.

I will prepare a programmatic example of the application of the module, for example, with the Arduino Pro Mini. It will take some time. Thank you for the positive comment of my development.

Ok, finally it's solved. I installed everything from scratch. Then installed your sandeep lib from your github. And finally added the LEDs and Buttons to the variants.h. That compiled successfully. And my problem was that the sensor is sleeping and I couldn'T get a heartbeat answered. So everything is clear and now testing...

@YuryPol as far as I know, all licenses require some form of documentation. In all cases I know of, this is documented with the license or on the licenses official site.

I think these look very interesting to do with small children may be able to stimulate their curiosity, the current video games are too much influence on children, occasionally the family together to do their own small games is a new experience.

First batch of devices arrived. Looks fine. I hope I will manage to install it in garden to the end of the week.

@Raj-Kiran you can use any 3mm LED. So the best is to choose the cheapest 3mm you can find on ALIEXPRESS.

I'm curious about PICs. Do you like PICs more than AVRs, and if so, why?

Hi @chey, no, with the pro minis and MySensors lib I couldn't get less. Didn't measure with yet another multimeter though... My battery sensors are working now for about a year and the battery levels are between 65% and 70%. The sensor furthest from the gateway is at 65% and the 3 others at 70%. Not bad I think. https://forum.mysensors.org/topic/11499/checking-mechanical-locked-doors-by-a-battery-based-windows-door-sensor-node

Could you share the capacitor values?

Hi, I complied your code for NRF51822 chip but I am getting the following errors at compile Arduino: 1.8.11 (Mac OS X), Board: "MyBoardNRF5 nRF51822, 16 kB RAM, 256 kB flash (xxaa), None, Crystal Oscillator" WARNING: library LIS2DW12-master claims to run on stm32, avr, sam architecture(s) and may be incompatible with your current board which runs on nRF5 architecture(s). /Users/puneit/Google Drive/MySensor/NRF51822/doorsensor/doorsensor.ino: In function 'void board_Init()': doorsensor:417:3: error: 'NRF_NFCT' was not declared in this scope NRF_NFCT->TASKS_DISABLE = 1; ^ doorsensor:419:13: error: 'struct NRF_UICR_Type' has no member named 'NFCPINS' NRF_UICR->NFCPINS = 0; ^ doorsensor:421:3: error: 'NRF_SAADC' was not declared in this scope NRF_SAADC ->ENABLE = 0; ^ doorsensor:422:3: error: 'NRF_PWM0' was not declared in this scope NRF_PWM0 ->ENABLE = 0; ^ doorsensor:423:3: error: 'NRF_PWM1' was not declared in this scope NRF_PWM1 ->ENABLE = 0; ^ doorsensor:424:3: error: 'NRF_PWM2' was not declared in this scope NRF_PWM2 ->ENABLE = 0; ^ doorsensor:425:3: error: 'NRF_TWIM1' was not declared in this scope NRF_TWIM1 ->ENABLE = 0; ^ doorsensor:426:3: error: 'NRF_TWIS1' was not declared in this scope NRF_TWIS1 ->ENABLE = 0; ^ Multiple libraries were found for "Wire.h" Used: /Users/puneit/Library/Arduino15/packages/sandeepmistry/hardware/nRF5/0.6.0/libraries/Wire Not used: /Users/puneit/Documents/Arduino/libraries/Wire Multiple libraries were found for "SPI.h" Used: /Users/puneit/Library/Arduino15/packages/sandeepmistry/hardware/nRF5/0.6.0/libraries/SPI Not used: /Users/puneit/Documents/Arduino/libraries/SPI exit status 1 'NRF_NFCT' was not declared in this scope Invalid library found in /Users/puneit/Documents/Arduino/libraries/ESP8266SdFat: no headers files (.h) found in /Users/puneit/Documents/Arduino/libraries/ESP8266SdFat Invalid library found in /Users/puneit/Documents/Arduino/libraries/SoftwareSerial: no headers files (.h) found in /Users/puneit/Documents/Arduino/libraries/SoftwareSerial Invalid library found in /Users/puneit/Documents/Arduino/libraries/ArduinoHwNRF5-master: no headers files (.h) found in /Users/puneit/Documents/Arduino/libraries/ArduinoHwNRF5-master Invalid library found in /Users/puneit/Documents/Arduino/libraries/arduino-nRF5-master: no headers files (.h) found in /Users/puneit/Documents/Arduino/libraries/arduino-nRF5-master Invalid library found in /Users/puneit/Documents/Arduino/libraries/ArduinoBoards-master: no headers files (.h) found in /Users/puneit/Documents/Arduino/libraries/ArduinoBoards-master This report would have more information with "Show verbose output during compilation" option enabled in File -> Preferences.

@jeremushka Same software can be used. The pin definitions need to be changed though.

Thanks for sharing. How did you get low current while still checking messages frequently enough? Or do you only check for messages every hour or so?

Good point! Will consider in the next version...

@berkseo Yes, it's available here. The documentation is a little bit scarce I admit but if you understand Apache MyNewt and its build system it should be pretty straightforward theoretically. I will add more details when I have the time. The code was tested and it's in production. Works without a glitch so far.

Sure, there is already the KiCAD file including everything to play around with on your own; added a picture of the schematic here for a quick glance without downloading.

@NeverDie said in The Harvester: ultimate power supply for the Raybeacon DK: Edit: This guy found another couple of possibilities as to what the E50D chip might be: https://www.electroschematics.com/pfm-module-circuit-surgery/ I have the same board as this guy. I removed the LED and resistor because they are on the input side, so they are almost useless anyway. For a board such as this, with a promised 0.9v startup voltage on the input side and a promised 5v on the output side, they really should have been attached to the output, not the input, to show roughly when it is that the board is producing useable output. At a 20mv "keep alive" input voltage, the input measures 0.5ma using a uCurrent Gold. That means the keep alive energy is 10 microWatts. Offhand, for the application we've been discussing on this thread, I suspect that number is too high to be practically useful, because at only 20mv input we'd be collecting far less than 0.5ma current from a tiny panel. At least now we know.

Nice project manufacturers datasheets, RF appnotes etc all mention this, with results for different usecases (like gnd plane size etc). I mentioned it a few times on the forum: nothing under or near antenna (keep out zone) their matching circuit, and CE/FCC certif are based on their development boards+their antenna if external, often without enclosure. there are a very few pcb antennas which are resilient to untuning. ceramic or meandered pcb are usually more compact but less resilient (like when you approach your hand and device suddently has better or worst communication) once you change any of these parameters (board shape, gnd size, enclosure etc), it breaks FCC, and may need retuning, still you can get useable range. "ideally" tuning should be done once enclosed for example. manufacturers can't cover all cases. on my side, I try to follow these rules. and when interested in a design or a device, I check this. Mainly the routing+gnd, antenna choice, keepout zone, and orientation vs my usecase (long range needed or not for example)

thanks for you reply Fumée Bleue.

@openhardware-io That looks great! - Perhaps they could make a version for the UK market called "regnsyn" ??? ;0

@Mishka Very nice work indeed. One question though: I don't see an antenna of any kind built into the PCB. Maybe I'm just not seeing it, or is there none? I do see a connection for an off-board near field antenna, but off-hand I don't see where the antenna is for 2.4Ghz RF. Oh, I see it now. You're using a chip antenna. Got it. Well, now that you've been using it for a while, how is the Raybeacon working out for you?

Hey! This looks like a great project! I'm considering building one for my hives. I notice that the legs need to be welded. That will be a chore for people that want to make this build themselves. Is this version designed to be built by anyone? Did you consider using open source or standardized hardware? Think of 2020 alu profiles or something, to allow reasonable buildability for users other than beep-base-shop. Also let me know if I misjudged, and that all components could be simply bought online. Stay awesome! ~ Bart

It will depend on the interval but I'd also be interested in this.

Both links in the first post come back as 404-not found.

All done! It works. I made some corrections to the silk screen, so everything should now be in order.

Perhaps answering my own question, I ordered one of these (it was $84, including delivery, during Black Friday) in order to properly characterize ultra low power energy harvesting circuits: https://www.aliexpress.com/item/33031557247.html?spm=a2g0o.cart.0.0.6f673c009dbs4n&mp=1 Ignoring its multimeter aspects, what remains is essentially a precision CV CC micropower supply intended for use as a calibrator. It has both microamp and microvolt output resolution, and the advertised accuracy (0.015% to 0.02%), if true, seems pretty good for the price. I should be able to calibrate a uCurrent Gold with it, for example. It may not arrive until much later in the month though. If anyone else wants to get one too, the normal price through this vendor is around $104, which to me still seems like a good price. I'm not sure why it's currently priced at $153, unless maybe it's in temporary short supply following the big Black Friday sale.

@Tommas Hi, now I've posted a device for sale on Tindie, if it's still relevant for you https://www.tindie.com/products/avikmen/usb-rf-gateway-with-stm32-and-nrf24-in-case/

Sorry, one more mistake. On the board, the UART port connector rotates on 180 degrees. In this case, UART on the Orange PI Zero and UART on the board should be connected with wires.

@shajek Drivers for MS are on the Internet. There is a project in which the author finalized the library and launched MQTT for sim5320. Here is the link: https://www.instructables.com/id/Remote-Control-and-Photo-Surveillance-Over-MQTT/ . Only there Arduino M0 is used (for convenience of working with several interfaces of UART). And it even transfers the image from the camera through MQTT and 3G channel.

Hello, Very interesting project ! When I try to put your gerber files in JLCPCB site, there is no view, and no dimensions ? Is it normal ? which dimensions is required ? Thanks

I also have project for mini. The project have pads for battery, battery protection IC, LIPO charger USB for charging... battery voltage measurements.... But the project is not released yet, because high temperature during charging.

Everything is possible I just added CAD files. If anyone wants to change something.

I am working on the analogous project. For several years I am using hw interface https://github.com/HynekBaran/OpenThermGWMini connecting the boiler and Arduino+NRF24L01 (which acts as a MySensors actuator). BUT: My boiler supports OpenTherm/Light (OT/-) protocol only. As far as I know, hw ("electric") specs of OT- are same as OT+ (2.0). So may be the simple OpenThermGWMini hw may be used, but there is missing MySensors sw part. See the original circuit diagram Maybe we may share?

Please add the documents required by the CERN license used.

Really nice, did you buy the glass plates from there ? https://www.aliexpress.com/item/2gang-golden-small-glass-switch-panel-match-with-Bingo-Elec-frame-glass-or-aluminum-and-2gang/32393507034.html If not, can you please tell where you get them from ? Thank you !

could you share a circuit diagram? thanks

@dzjr Congrats! My works on hobby is not hard because of we have nice weather too

Hello, i'm making some progress; received the components this week. Unfortunately it doesn't work... yet For now i have SanityCheck failure in to logs. I'm afraid my soldering of all these little components is not good. I tested with a multimeter the 4 pins and i have continuity on one of them but maybe not the others so i guess i will have to try remelting all these small regulators ???

@tiana I have not used it, but it is possible to create different revisions. See https://www.openhardware.io/view/4/EasyNewbie-PCB-for-MySensors#tabs-revisions as an example.

5 months and voltage still holding decently high /77/28/1/0/38 2.964

@rvendrame sorry, I did not see your comment. Yes, it is VERY valuable. Thanks a lot

@kimot I am not handling that situation. I'm taking for granted ssr will do his job. Maybe there's some ssr safety topic I'm unaware? Suggestions for a v3.0 are welcome. About the temperature measuring... I use two sensors. The one in the board protects electronics from temperatures beyond design (60°C). It's near the ssr because the ssr's derating curve is the most limiting condition. The control sensor is placed in the bottom of the heater. It connects to the board through a 3 pin header connector.

But it's not a cube!

@sebdetours said in MDMSPanel "Nextion": Did you take a standart case that you cut out? Hi @sebdetours, yes. This is G1910 (Gainta) box. See drawing attached to projet files.

By the way, I'm currently using the RF Nano as a 'usb key gateway', or sorts. With the WebThings Gateway, a user just has to install the Candle manager add-on. Then they plug in the RF Nano and select that they want to upload gateway code from a menu. That's all they have to do.

@Serg2055 as the name says, openhardware.io is for open hardware. You are allowed to sell PCB units, partially or fully soldered boards, but selling source is not an acceptable option. Please include readable schematic and source of your boards or at least gerbers or bom. For all your boards posted on openhardware.io. Thank you !

The author has done some good work ensuring good design practices; trace separation, fuses, etc. but I don't see any extra I/O brought out on this particularl switch. You would have to carefully solder to the chip itself, and modify the code a bit. You could use magnetic switches. Put a magnet on the blinds and the switch in window sill. The author notes that this is not an Arduino, but uses the same chip that the Arduino uses. The author doesn't explain how the chip is programmed. This method could have been used. It may be just as easy to use an RF Nano with a little power supply. This suggestion is not nearly as robust as the author's. For example, these power supplies have gotten bad reviews mainly because the mains power traces are too close together. I justify using them because in all likelihood a failure will pop the power supply and probably the Nano, too, noting that these are cheaper than the fuses you would put in to protect them. I am fully aware of the risks involved in doing this, and you should be, too (eg. burning down your house). -OSD

Hello. I use an optical pair, all the processing is done by the processor.

You might also be interested in the MIC2779 hysteresis chip: http://ww1.microchip.com/downloads/en/DeviceDoc/MIC2779-Voltage-Monitor-with-Adjustable-Hysteresis-DS20006116A.pdf which seems to do what you want, but all in a single chip.

Interesting, please note that you need to be a licensed ham radio operator, in order to use the APRS network.