THey @everyone, we're starting in a couple minutes! See you in the meetup!
DCongrats @ygramoel ! You've been Verified!
S@ygramoel Welcome! will be happy to know your technical background and what project you're working on these days.
N@everyone Thanks for tuning in for today's DevHeads Office Hours! We talked all around IoT FOTA, Tiny Scarab board and about some exciting demo videos coming up. Again, cheers to all new Dev's!
People who have missed this can always watch the recording. Stay tuned and keep smashing that bug.
People who have missed this can always watch the recording. Stay tuned and keep smashing that bug.
YHi @Saßì , I'm currently working on the Embeetle IDE together with @kmulier, I have a background in EDA tool development mostly, also all kinds of electronics project, started working in 1983, long before internet became ubiquitous. Trying to figure out what devheads is all about
YTo be honest, I don't really understand how Discord works yet. Typing this on my phone because haven't figured out yet how to connect to this channel on my pc
NYThat worked, thanks
PI got my hands dirty on Resin 3D printing for the very first, Results are flabbergasting.
A word of caution for those who wanna try the same:
This model took 3 hrs to print, 30mins of post processing and almost 2.5-3hrs to clean all the mess
A word of caution for those who wanna try the same:
This model took 3 hrs to print, 30mins of post processing and almost 2.5-3hrs to clean all the mess
NGood job
SHello guys,
I wanted to know more about standardised architecture of linux based embedded system.
My system is having Digital IOs, Analog IOs, CAN, Modbus over RS485, RTC, Web server etc....
Hardware is ready. Also, it's working smoothly but i dont want it to be tightly coupled.
What i want is every other module will work independently and i will code the application (Custom logic) only as per requirement.
Any suggestions, posts, links.....i am relatively new to this.
Thank you...!!
I wanted to know more about standardised architecture of linux based embedded system.
My system is having Digital IOs, Analog IOs, CAN, Modbus over RS485, RTC, Web server etc....
Hardware is ready. Also, it's working smoothly but i dont want it to be tightly coupled.
What i want is every other module will work independently and i will code the application (Custom logic) only as per requirement.
Any suggestions, posts, links.....i am relatively new to this.
Thank you...!!
Aas the requirement you have provided ... i feel that all these input interrupts and outputs should have thier own logic and so some kind of ipc ... in that situation you can utilize some ipc methods or else you may use ros as an architect ... where everything is a pub sub structure and considered as nodes ...
Aalso may i know the environment and mpu details ..
Abuild environment*
Ahere by ipc i mean ... inter procedure communication ...
K
KI'm placing TVS diodes at all the IO pins
KFor example:
K
KI also installed plenty of 'security' at the USB port:
K
K(1) TVS DATA LINES
TVS Diodes protect the USB data lines against voltage transients.
(2) TVS 5V POWER
A larger TVS diode is placed on the 5V power incoming from the USB connector to deflect voltage transients.
(3) ZENER 5V + (4) FUSE
A zener diode of 5V6 (I took a bit of margin) is connected to the 5V USB power line. A permanent overvoltage will short through this zener diode and burn the fuse. The rest of the circuit should be fine.
(5) PMIC 500mA
A
TVS Diodes protect the USB data lines against voltage transients.
(2) TVS 5V POWER
A larger TVS diode is placed on the 5V power incoming from the USB connector to deflect voltage transients.
(3) ZENER 5V + (4) FUSE
A zener diode of 5V6 (I took a bit of margin) is connected to the 5V USB power line. A permanent overvoltage will short through this zener diode and burn the fuse. The rest of the circuit should be fine.
(5) PMIC 500mA
A
AP2141WG-7ERR
FThat sounds wayyyy overkill for such a cheap microcontroller
FLike for me personally I think replacing the microcontroller itself would be cheaper
T@Wired & Wireless Networking folks, any suggestions on the best MQTT client software to use when testing MQTT topics during development? At least as far as ease of use and security are concerned..?
Amqtt explorer is what i prefer for the ease of usage
TNice! Thanks. I'm looking into it. Looks like it checks a lot of boxes around open source, platform support, and decent enough documentation, BUT...
Is it still being maintained?
https://mqtt-explorer.com/
Is it still being maintained?
https://mqtt-explorer.com/
TAlso, how and from where do I know Thomas Nordquist 
... I can't put my finger on it...
... I can't put my finger on it...
UEven I use MQTTExplorer daily but when working with sensitive applications, especially for security where we need to upload files (.crt, private or public.pem etc). I prefer MQTTFx. For a mobile client, also recommend looking into the MyMQTT App if security is not a concern
TCosts $$ 
UYes, unfortunately, *MQTTFx *costs $ starts at 49.90€. For free as Abhishek said MQTTExplorer is good to get the job done!
DCongrats @Deepak ! You've been Verified!
S@Deepak Welcome , Can you tell us a little about yourself and your technical background? What brings you to DevHeads? What are you working on currently?
DCongrats @topgun3237 ! You've been Verified!
S@topgun3237 Welcome! will be happy to know your technical background and what project you're working on these days.
KHi @fwen ,
I understand your point. However, all that protection is not so much to safeguard your "investment" in the 10-cent MCU. It's intended to safeguard your time investment. See, a Transient Voltage event (eg. ESD discharge) can damage the chip slightly, such that some of its IO pins no longer work. You might not immediately figure out why your project is failing and be troubleshooting for a whole day.
I understand your point. However, all that protection is not so much to safeguard your "investment" in the 10-cent MCU. It's intended to safeguard your time investment. See, a Transient Voltage event (eg. ESD discharge) can damage the chip slightly, such that some of its IO pins no longer work. You might not immediately figure out why your project is failing and be troubleshooting for a whole day.
Foh i thought when it's damage it just no longer work. i havent had any failed on me before. thanks for the clarification!
GAesthetics 
P@kmulier ESD diodes on IOs on a dev board is not really required.
KGlad you guys like the aesthetics.
Why are ESD diodes not required on IO from a dev board?
Why are ESD diodes not required on IO from a dev board?
Pwhy do we need ESD diodes?
P- to protect from static charge
YInvalid arguments provided: No matching combo found
Pdev board is expected to be used in lab, which is a controlled ESD safe env most of the time
Pso ESD diode is not really required but not harmful
Pif you are anticipating risk of damage then we have more risk on all switches, where a person will be touching frequently
Pone more thing I sucpect your switch and a few passives are very near to the mouting holes, please check if someone try to use screw with head, it will not touch or come very near
Pdid you use fuse after 5V TVS?
Pit should be USB 5V>Fuse>TVS
Pplz check