DevHeads IoT Integration Server•2y ago

@tahenan @BenCos18 @scitechindian and maybe @InsightMike may be able to lend some perspective here

JJoseph Ogbonna I need a guide on how to select the right gateway for my lorawan product. Am Des...

BenCos18•3/4/24, 6:56 AM

I personally like the wm1302 one atm that seeed studio has tbh

BBenCos18 I personally like the wm1302 one atm that seeed studio has tbh

Joseph Ogbonna•3/4/24, 6:58 AM

Great I will check it out. Will it work with the STM32 Lora family? And how can I do the configuration

JJoseph Ogbonna Great I will check it out. Will it work with the STM32 Lora family? And how can ...

BenCos18•3/4/24, 7:38 AM

Should work with most lora stuff
I used a pi with it though I know someone used a esp32 for it on the things network forum before

BenCos18•3/4/24, 7:38 AM

Lora stuff is pretty standard once you use the right frequency

BenCos18•3/4/24, 7:39 AM

Box is a bit hard to see but the lorawan hat is the board connected to the black wire

BenCos18•3/4/24, 8:19 AM

I have it setup as a packet forwarder pretty much though

youcef_ali•3/4/24, 9:58 AM

What are #LVDS Low voltage Differential signals and use cases ?

Yyoucef_ali What are #LVDS Low voltage Differential signals and use cases ?

aymen ammari•3/4/24, 11:12 AM

Low Voltage Differential Signaling (LVDS) is a method for transmitting digital data at high speeds over twisted-pair copper cables. LVDS uses differential signaling, meaning it sends the same signal over two wires with opposite polarities. This helps reduce noise and increase the immunity to electromagnetic interference.

LVDS is commonly used in various applications, including:

1. High-Speed Data Transmission: LVDS is widely used in applications requiring high-speed data transfer, such as displays, monitors, and high-speed serial communication links.
2. Display Interfaces: LVDS is often used in flat-panel displays, such as LCD and OLED screens, to transmit video data from the graphics controller to the display panel.
3. Automotive Applications: LVDS is employed in automotive systems for transmitting video signals between components such as cameras, displays, and infotainment systems.
4. Industrial Applications: LVDS is utilized in industrial automation systems, where high-speed, reliable data transmission is essential for control and monitoring purposes.
5. Networking Equipment: LVDS can be found in networking equipment, such as routers and switches, for transmitting data between different network components.

Overall, LVDS offers high-speed, low-power, and reliable data transmission, making it suitable for a wide range of applications where high-speed digital communication is required.

BBenCos18 Should work with most lora stuff I used a pi with it though I know someone used...

Joseph Ogbonna•3/4/24, 11:28 AM

Ok thanks I will need your help later ok

JJoseph Ogbonna Ok thanks I will need your help later ok 🙏

BenCos18•3/4/24, 11:36 AM

BenCos18•3/4/24, 11:46 AM

It'd a deep rabbithole when you start tbh

BenCos18•3/4/24, 11:47 AM

I have mine hooked up to the things network to help with coverage for it

Aaymen ammari Low Voltage Differential Signaling (LVDS) is a method for transmitting digital d...

youcef_ali•3/4/24, 12:50 PM

Thank you @aymen ammari, what this the best way to receive lvds signals and how to manage them ?

Yyoucef_ali Thank you @aymen ammari, what this the best way to receive lvds signals and how ...

aymen ammari•3/4/24, 1:03 PM

No worries, I'm not expert as signals but here is what I found in the Net :

aymen ammari•3/4/24, 1:04 PM

The best way to receive LVDS signals depends on the specific requirements of your application and the capabilities of the receiving device. However, here are some general guidelines for receiving and managing LVDS signals:

1. Use Proper LVDS Receiver ICs: Choose LVDS receiver ICs that are suitable for your application and meet the required speed, voltage levels, and noise immunity. There are many LVDS receiver ICs available from various semiconductor manufacturers designed specifically for different applications.
2. Match Impedances: Ensure that the impedance of the transmission lines and the receiver inputs match to minimize signal reflections and maintain signal integrity. This typically involves using controlled impedance transmission lines and termination resistors at the receiver end.
3. Clock and Data Recovery (CDR): In high-speed applications, consider using a Clock and Data Recovery (CDR) circuitry to recover the clock signal and data from the incoming LVDS signals. This helps to ensure accurate data reception even in the presence of jitter and signal distortion.
4. Signal Conditioning: Depending on the specific requirements of your application and the characteristics of the LVDS signals, you may need to implement signal conditioning techniques such as equalization, pre-emphasis, or filtering to improve signal quality and reliability.
5. Power Supply Decoupling: Properly decouple the power supplies of the LVDS receiver ICs to minimize noise and interference. Use low-noise power supplies and bypass capacitors close to the ICs to filter out high-frequency noise.
6. Grounding: Pay attention to grounding techniques to minimize ground loops and reduce noise coupling into the LVDS signals. Ensure a solid and low-impedance ground connection for both the transmitter and receiver sides.

aymen ammari•3/4/24, 1:04 PM

7. Error Detection and Correction: Implement error detection and correction mechanisms if necessary, especially in applications where data integrity is critical. This may involve using techniques such as CRC (Cyclic Redundancy Check) or FEC (Forward Error Correction).

Saßì•3/4/24, 1:20 PM

@streetdogg Welcome,! We're happy to have you as a DevHead. Feel free to let us know what you're working on now and a bit about your technical background.

Navadeep•3/4/24, 1:27 PM

Welcome @streetdogg !

NNavadeep Welcome @streetdogg !

streetdogg•3/4/24, 1:49 PM

hello

thank you!!

Sstreetdogg hello 🙂 thank you!!

techielewOP•3/4/24, 2:06 PM

Nice to meet you @streetdogg

streetdogg•3/4/24, 2:07 PM

nice to meet you too, @techielew

Budweiser•3/4/24, 2:20 PM

Hello

Ttechielew Hmmm, tough one. @abhishek awasthi? There was another question recently about d...

tahenan•3/4/24, 2:30 PM

Thank you for this, Will take a look, yes I just want to understand the basic concepts involved

Ttechielew @tahenan @BenCos18 @scitechindian and maybe @InsightMike may be able to lend so...

tahenan•3/4/24, 2:33 PM

Also just for prototype, take a look at sentrius gateway (not exactly something you may need), this has multiple wireless access, such as Wi-Fi, BLE and LoRa and LTE too https://www.lairdconnect.com/iot-devices/lorawan-iot-devices/sentrius-rg1xx-lorawan-gateway-wi-fi-ethernet-optional-lte-us-only

Laird Connectivity

Sentrius RG1xx LoRaWAN Gateway + Wi-Fi / Ethernet + Optional LTE (U...

New: RG191 with LTE for operation in US (Wi-Fi / LoRa / Ethernet / LTE)The Sentrius™ RG1xx LoRaWAN-Enabled Gateway is the ultimate in secure, scalable, robust LoRaWAN solutions. Gather data from as...

JJoseph Ogbonna I need a guide on how to select the right gateway for my lorawan product. Am Des...

InsightMike•3/4/24, 2:37 PM

You shouldn't have any compatibility issues. Most important is selecting the right frequency for your region. If your gateway is just used as a "packet forwarder" for low volume traffic, any will work fine. If you need to embed your LoRaWAN Network Server on the gateway then you'll need a higher end product. Also, some gateways have better range performance and better high traffic performance, but if you're just doing some small system testing that won't be an issue.

Saßì•3/4/24, 2:38 PM

@jjo548 Welcome,! We're happy to have you as a DevHead. Feel free to let us know what you're working on now and a bit about your technical background.

IInsightMike You shouldn't have any compatibility issues. Most important is selecting the ri...

Joseph Ogbonna•3/4/24, 2:42 PM

Great thanks.

techielewOP•3/4/24, 2:53 PM

oops haha

Budweiser•3/4/24, 2:53 PM

background mechatronics engineering, have worked in control engineering, signal processing, embedded software dev, did some fpga-development with vhdl, yeah... that sort of stuff.. currently working on an automated object tracking system for aerial objects

BBudweiser background mechatronics engineering, have worked in control engineering, signal ...

techielewOP•3/4/24, 2:56 PM

Wow, the gamut of disciplines. @Navadeep will be a friend.

Happy to have you aboard. If you have any suggestions/requests let us know in the #suggestion-box or just throw them in here. Also we have weekly events right now that we're going to increase in frequency soon and you're more than welcome to attend those as well.

techielewOP•3/4/24, 2:58 PM

Hey guys, IDE poll just ended. No real surprises here: https://discord.com/channels/1130679493799977062/1199293807737450538/1214147961366249482. VSCode dominates, followed by Eclipse, Arduino IDE, and STM32. Anyone shocked by that?

Discord

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techielewOP•3/4/24, 2:59 PM

I have another poll that's tech-adjacent. Since we're going to be opening up to the world soon, we'd like to know where do you guys get your engineering information/education? I'll post a poll on that soon.

Budweiser•3/4/24, 3:00 PM

I strongly condemn the use of http://www.libgen.is where people type in e.g. the title of a book or a general search term relating to book titles and http://sci-hub.hkvisa.net where people e.g. type in a papers DOI, these are grave copyright violations!

Library Genesis

Library Genesis is a scientific community targeting collection of books on natural science disciplines and engineering.

Sci-Hub

Sci-Hub,mg.scihub.ltd,sci-hub.tw,The project is supported by user donations. Imagine the world with free access to knowledge for everyone ‐ a world without any paywalls.

wafa_ath•3/4/24, 4:14 PM

hello, in MQTT version 5 the Request/Response feature , Could you clarify whether is the publisher, after initiating a request, receives a response from the subscriber? and could you provide a basic code example for both the publisher and subscriber to test it and add it to my code

Wwafa_ath hello, in MQTT version 5 the Request/Response feature , Could you clarify wheth...

Umesh Lokhande•3/4/24, 5:47 PM

Yes, the subscriber sends back a response message to publisher

IInsightMike You shouldn't have any compatibility issues. Most important is selecting the ri...

BenCos18•3/4/24, 6:05 PM

Yep
As long as you use the right frequency he gateway itself is pretty reliable

UUmesh Lokhande Yes, the subscriber sends back a response message to publisher

wafa_ath•3/4/24, 6:56 PM

Do you know how to do it?!

boualleg sabrina•3/4/24, 7:15 PM

guys, have you worked with stm 32, nucleo-64, development board ?

boualleg sabrina•3/4/24, 7:18 PM

stm32-nucleo-64-development-board-with-stm32l476rg-mcu.jpg

Wwafa_ath Do you know how to do it?!

Umesh Lokhande•3/4/24, 7:19 PM

I'd suggest download python scripts from online sources like ChatGPT for publisher and subscriber and evaluate the feature. I never needed to implement. As it comes as a feature of MQTTv5

Flo•3/4/24, 8:54 PM

Hi all! My name ist Flo, 29 from Germany. Studied computer science and have been working as an embedded software developer for one year now. Mainly Yocto, RTOS, C/++, Python, ARM. I'm here to help where possible and LEARN. Also I'd really enjoy some funny, relaxed tech talks, as I sadyl cant do that IRL. :D

Aaymen ammari The best way to receive LVDS signals depends on the specific requirements of you...

youcef_ali•3/4/24, 9:34 PM

Thanks again by I'm talking about process system mcu/cpu

kristof-at-embeetle•3/4/24, 11:10 PM

Hi guys,
Hi @Petr Dvořák ,
please have a look at this article:
devheads-feedReturn Path Routing — Why No One Does It, But You Really Should

FFlo Hi all! My name ist Flo, 29 from Germany. Studied computer science and have been...

techielewOP•3/4/24, 11:43 PM

Welcom @Flo We're happy to have you here! lol I'm not sure whether I can have funny, relaxed tech talks irl but I try every Friday!

What are you looking to learn now?

Flo•3/5/24, 9:20 AM

At the moment I am trying to build an armbian image for a very old and unknown tablet namely "Prestigio PMP5197DULTRA". It has an Allwinner A10. Sadly it does not use device tree files but fex files. So that's the problem right now. Also I never built/customized a Linux image from scratch. If anyone has some hints for me, they are greatly appreciated!

Flo•3/5/24, 9:22 AM

Thats what im practically learning at the moment and besides that im watching DevCon talks on YT and reading some eBooks. Also need to learn more about Yocto, RTOS and C++.

Saßì•3/5/24, 9:37 AM

@umairahmed17 Welcome,! We're happy to have you as a DevHead. Feel free to let us know what you're working on now and a bit about your technical background.

Bboualleg sabrina Click to see attachment

Umesh Lokhande•3/5/24, 1:52 PM

Yes, I use STM32 Nucleo board (STM32F446RE) from time to time

Saßì•3/5/24, 3:45 PM

Friendly Reminder about Upcoming Event
https://discord.com/invite/Ju79Krk2?event=1213840801101119538

Kkristof-at-embeetle Hi guys, Hi @Petr Dvořák , please have a look at this article: https://discord.c...

Navadeep•3/5/24, 3:54 PM

Great article. Liked the depiction of loops and paths.

@tahenan @BenCos18 @scitechindian and maybe @InsightMike may be able to lend some perspective here

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