Few days ago on this server I posted about I want to extract data from a rs485 flow meter , Adler th

Few days ago on this server I posted about I want to extract data from a rs485 flow meter , Adler the suggestion I did write the code the communication between arduino and flow meter was successfully but , it’s unable to read the data as I don’t have the exact register and the address which is responsible for that data , even the manual doesn’t mention it . Is there a way to find it ? I have the name of the chip .

RRenuel Roberts Your code doesn't show any handling for the RE try apply the logic in your code ...

Accur4teOP•6/20/24, 4:34 AM

AAccur4te Few days ago on this server I posted about I want to extract data from a rs485 f...

techielew•6/20/24, 6:10 AM

What's the chip

Ttechielew What's the chip

Accur4teOP•6/20/24, 6:12 AM

atmega 16

Accur4teOP•6/20/24, 6:12 AM

i dig the info up - i got exact value of the register yet , arduino is unable to retrive info

Accur4teOP•6/20/24, 6:23 AM

0x4001 to 0x4003 ---> flow rate value
0x4004-->flow rate value unit
0x4005 to 0x4007 -->totalizer value
0x4008-->totalizer value unit

Accur4teOP•6/20/24, 6:23 AM

irst digit is data bits which is 8b
Second digital is Parity which you select as N for None, E for Even, O for Odd
Third digit is stop bite which you can select as 1 / 2 bits

Accur4teOP•6/20/24, 6:23 AM

should i share the code?

AAccur4te should i share the code?

techielew•6/20/24, 6:36 AM

Yes, share your above description and the code in the #code-review channel and we'll make sure it gets visibility

AAccur4te Few days ago on this server I posted about I want to extract data from a rs485 f...

ZacckOsiemo•6/20/24, 6:48 AM

whats the name of your chip

Ttechielew Yes, share your above description and the code in the #code-review channel and w...

Accur4teOP•6/20/24, 7:37 AM

i don't have access to that chhannel

ZZacckOsiemo whats the name of your chip

Accur4teOP•6/20/24, 7:37 AM

its atmega16

AAccur4te i don't have access to that chhannel

techielew•6/20/24, 7:49 AM

Go to <id:customize>, navigate to the "Browse Channels" tab, then search "Code-Review" and it will come up. Click the checkbox.

Screenshot_2024-06-20_at_12.49.27_AM.png

techielew•6/20/24, 7:53 AM

@Event Pings and @Middleware & OS, there's been a lot of chatter around RTOS lately so just a reminder that this week's Office Hours is going to be a further exploration of the Zephyr RTOS with @ZacckOsiemo where he'll review scheduling.

You can sign up for a reminder and access the event here (https://discord.com/events/1130679493799977062/1253254620013400074) on Friday at 15:00 GMT.

Ttechielew Go to <id:customize>, navigate to the "Browse Channels" tab, then search "Code-R...

techielew•6/20/24, 8:09 AM

@accur4te were you able to access to the channel?

Ttechielew @accur4te were you able to access to the channel?

Accur4teOP•6/20/24, 8:10 AM

the option is not coming which i type code-review

Accur4teOP•6/20/24, 8:10 AM

AAccur4te Click to see attachment

techielew•6/20/24, 8:11 AM

I'll check your roles

AAccur4te the option is not coming which i type code-review

techielew•6/20/24, 8:15 AM

now?

Umesh Lokhande•6/20/24, 8:15 AM

@accur4te Did you checked the box "show all channels"

Ttechielew now?

Accur4teOP•6/20/24, 8:15 AM

yeah now i am able to access it thanks a lot

UUmesh Lokhande @accur4te Did you checked the box "show all channels"

Accur4teOP•6/20/24, 8:15 AM

thanks i did it now

AAccur4te 0x4001 to 0x4003 ---> flow rate value 0x4004-->flow rate value unit 0x4005 to 0...

techielew•6/20/24, 8:43 PM

Any of the @MCU, MPU & Firmware devs familiar enough with Arduino to help out on this one?✅-code-reviewunable to retrieve data from a rs485 based flowmeter

KyArjun 🔬•6/21/24, 5:52 AM

I use the ESP32 Wroom module in developing my project, when the program code is run the gas sensor that I use always gives the output "MQ135Status: 0". I don't think there is anything wrong with my code, is this related to the esp32 module that I use?

KKyArjun 🔬I use the ESP32 Wroom module in developing my project, when the program code is ...

Accur4teOP•6/21/24, 7:13 AM

as per the error code , there is problem sensor reading or communication - check wiring , lib use , or trying giving 5v vcc if it supports and do use a analog pin for sensor data .

KyArjun 🔬•6/21/24, 7:21 AM

I have also used as what you said but nothing changed

Accur4teOP•6/21/24, 7:23 AM

can you share the code?

KyArjun 🔬•6/21/24, 9:05 AM

When I used the simple code, I was able to read the sensor value, but when I used the code you gave me, there was no output anymore.

KKyArjun 🔬When I used the simple code, I was able to read the sensor value, but when I use...

techielew•6/21/24, 1:41 PM

Hi @rezky_arjuna can you drop your code/question into the #code-review channel as a post? That’ll help prevent it from getting lost and get more eyes on it

Ttechielew @Event Pings and @Middleware & OS, there's been a lot of chatter around RTOS lat...

techielew•6/21/24, 1:44 PM

Hey @Event Pings just a friendly reminder that our continued exploration of Zephyr continues in a little less than 90 minutes with @ZacckOsiemo who will be sharing the ins and outs of scheduling on the Linux-like RTOS.

See you in the room: https://discord.com/events/1130679493799977062/1253254620013400074

Ttechielew Hey @Event Pings just a friendly reminder that our continued exploration of Zeph...

techielew•6/21/24, 2:56 PM

See you in 5 @Event Pings

Dtynin•6/21/24, 3:10 PM

I'm unable to join @techielew

lev•6/21/24, 4:12 PM

Sejuuk•6/21/24, 4:58 PM

Hi! I'm a bit of a late-bloomer having been stuck 15 years doing legacy FoxPro work. Now I'm on to C#, WPF, ASP.NET, and checking out Blazor. I love making apps!

SSejuuk Hi! I'm a bit of a late-bloomer having been stuck 15 years doing legacy FoxPro w...

Renuel Roberts•6/21/24, 5:04 PM

Nice, if u need any collaboration am up for it

SSejuuk Hi! I'm a bit of a late-bloomer having been stuck 15 years doing legacy FoxPro w...

Marvee Amasi•6/22/24, 6:45 AM

Nice for you to join us @Sejuuk

Accur4teOP•6/22/24, 8:18 AM

Is there any separate channel for career advice related to electronics industry or should I put my question here ?

AAccur4te Is there any separate channel for career advice related to electronics industry ...

techielew•6/22/24, 12:41 PM

You can put here for now

Ttechielew You can put here for now

Accur4teOP•6/22/24, 2:18 PM

okay

Accur4teOP•6/22/24, 2:18 PM

Hey everyone, I need some advice. My dad, who's a businessman in the flowmeter industry, thinks the two projects I've been working on for the past 3 months are big steps and that I'm trying to skip some steps. The projects are an ESP mesh for flowmeters and an electromagnetic flowmeter. I agree with him to some extent.

I'll be joining my second year in ECE college in the next few days. What do you think my next step should be? Should I try to get an internship in a business related to IoT (my field of interest), or should I focus on learning more theory? I already have 7+ years of experience with electronics (mainly Arduino, ESP, and Raspberry Pi) and recently finished learning Embedded C. I genuinely need help deciding. I'm really passionate about electronics, especially IoT. Thanks!

Accur4teOP•6/22/24, 2:18 PM

i want to learn electronics in depth but also its business side

AAccur4te Hey everyone, I need some advice. My dad, who's a businessman in the flowmeter i...

Umesh Lokhande•6/23/24, 6:34 AM

Not sure if I'm the right person to answer. But if I have been at your place. I'd have preferred to engage in an internship to gain more technical hands-on experience with professional tools used in embedded & IoT. All this is to be done along with academic studies.

AAccur4te Hey everyone, I need some advice. My dad, who's a businessman in the flowmeter i...

techielew•6/23/24, 12:24 PM

Could you do both? Can your dad help arrange a part-time internship?

techielew•6/23/24, 12:30 PM

Hi @Event Pings
Last week some of our Engineering Hour attendees experienced technical difficulties with the stream of @Edison's session on DMA so I'm uploading the recording here. As a reminder, here's

Direct Memory Access & How It Will Transform Your Prototype for Production
You’ve heard of direct memory access and know it’s important in certain settings. Now, as your prototype gets closer to becoming a viable product, you need to optimize resources and performance. It’s time to dive head first into the world of DMA.

DMA provides a clear path from peripherals like sensors to memory, circumventing the microcontroller or microprocessor so it can remain dedicated to other tasks. That’s the simplest explanation of DMA, but under the hood there’s a lot more going on.

Tune in as IoT developer and trainer Edison Ngunjiri will walk us through the basics of DMA on an STM32 microcontroller by providing an overview of:

The STM32 DMA architecture
Key components: Channels, Streams, Requests, etc.
DMA Modes of Operation: Normal, Circular

*After providing this background, Edison will perform a step-by-step DMA configuration in the STM32CubeIDE where he’ll set up DMA channels, streams, and integrate peripherals. He’ll then discuss application examples before walking through DMA event and interrupt handling, which he’ll demonstrate during a live memory-to-memory data transfer. *

Don’t miss the chance to learn or brush up on your DMA skills.

https://www.linkedin.com/events/7210632510907592704/theater

Direct Memory Access & How It Will Transform Your Prototype for Pro...

Ttechielew Hi @Event Pings Last week some of our Engineering Hour attendees experienced tec...

techielew•6/23/24, 12:33 PM

However, you'll have to attend Engineering Hours to see all of each of them

I'll also post a link to this in the https://discord.com/channels/1130679493799977062/1212286094830477323 channel chat so you can pose questions to Edison/others about DMA and related topics.

Ttechielew However, you'll have to attend Engineering Hours to see all of each of them 🙂 I...

Joseph Ogbonna•6/23/24, 3:06 PM

Joseph Ogbonna•6/23/24, 3:43 PM

How can we strike a balance between security and performance in IoT devices, especially low-power ones, to ensure robust protection without compromising efficiency, potentially through the use of lightweight encryption and future blockchain-based technologies? @MCU, MPU & Firmware @PCB & Analog

JJoseph Ogbonna How can we strike a balance between security and performance in IoT devices, esp...

ZacckOsiemo•6/23/24, 4:14 PM

This is an insanely loaded question but since you are already leading with lightweight encryption can you give us some sort of example?

ZZacckOsiemo This is an insanely loaded question but since you are already leading with light...

Joseph Ogbonna•6/23/24, 4:34 PM

Using lightweight cryptography and running it at the device level, that's able to perform some system computation at the edge

JJoseph Ogbonna Using lightweight cryptography and running it at the device level, that's able t...

ZacckOsiemo•6/23/24, 4:36 PM

But to what end? how much of your time are you running cryptography when you could be working. Would I use this in antilock brakes? I need security but I need timeliness more.

JJoseph Ogbonna How can we strike a balance between security and performance in IoT devices, esp...

Ming•6/23/24, 4:43 PM

By doing risk analysis and threat modeling. You would start by looking at the value of the asset you are wanting to protect (hardware, functionality, IP, etc) and then working out the balance from the threats and the cost of protecting them.

For example, I only used AES128 on one of my low powered devices because the data it is protecting only has value for a short period of time, so the lower security is deemed ‘good enough’.

If the data was more valuable, then I would have had to use a more powerful device to enable stronger encryption.