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Me No Dev
@me-no-dev
just logic conversion?
Martin Ayotte
@martinayotte
How many channel do you need ? (btw, HCT245 is also available in soic-20)
Me No Dev
@me-no-dev
i magine he needes 1
a small fast fet can do the trick
Martin Ayotte
@martinayotte
Then, I would rather use simple MOSFET
sticilface
@sticilface
yes just the one
2N7000 a small fast FET...
?
I just know that this problem is not too straightforward... they seem to be very picky... but i need to have a small footprint design for something I'm planning!
Martin Ayotte
@martinayotte
Yes, but it can be any other, such AO3402
Me No Dev
@me-no-dev
it needs to have a fast switching speeds so it does not mees up the timing that pixels are so picky about
BTW I have never had issues controlling neopixels at 3.3V
Martin Ayotte
@martinayotte
Since you don't need to have the above bi-directional, you can remove R1 on 3V side.
@me-no-dev , those MOSFET have Rise/Fall time pretty small, I don't see why it should not work.
sticilface
@sticilface
@me-no-dev i know that the DMA version of neopixels stopped working when used with 3.3V, and I've had problems when using the LEDs at really low brightness levels... they flash and do all sorts... this might have changed now.. but i just had lots of problems before, switch in logic conversion and it went away!
Me No Dev
@me-no-dev
I do not argue :) I have not driven more than 16 pixels and have not used the i2s version
sticilface
@sticilface
These look promising AO3402
loving the SMD stuff... much cheaper than through hole
sticilface
@sticilface
thanks for the advice. i'll order some and get back to you... in 6 weeks!
Me No Dev
@me-no-dev
:D
Baruch Even
@baruch
@igrr the full support for coroutines seems to be getting a bit more complicated. There are two spots that don't get an argument for a callback which will just add a limitation on the user but the TCP stack calls for two sources of wakeup, the data callback and a timeout callback which complicates things. I'll still think about it but I'm getting less convinced it's worth it.
Michael Miller
@Makuna
@me-no-dev Yeah, NeoPixel models and "generations" have differing tolerances. The same chip but purchased six months apart may work well at 3.3v. BUT, the spec on most of them is 3.8v - 5.4v; so 3.3v is out of spec. The problem is that they don't fail, they just act strange (flashing, some pixels fail to light, colors are off).
FWeinb
@FWeinb
Say I want to build a very simple PCB based on this board (http://www.wemos.cc/Products/protoboard_shield.html) what would I need to e.g. send it to OSH Park and get some boards? Do I really have to learn Eagle or would Fritzing work too? It would only need like 4 traces.
Me No Dev
@me-no-dev
@Makuna wow :) did not know and expect that...
FWeinb
@FWeinb

It looks like SPIFF is broken on one of my Wemos D1 minis. I can't upload any spiff data.

warning: espcomm_send_command: didn't receive command response
warning: espcomm_send_command(FLASH_DOWNLOAD_BEGIN) failed
closing bootloader
error: espcomm_upload_mem failed

But uploading a new programm is working fine... using latest platformio

FWeinb
@FWeinb
Even OTA Spiff upload is broken on 50%
Helio Machado
@0x2b3bfa0
Hi!
rollercontainer
@rollercontainer
Hi, is there a way to compile these library for an esp8266? https://github.com/dailab/libsml
I've tried it one time and its struggeling by searching for uuid.
Mario Mikočević
@mozgy
@FWeinb eagle or kicad is very easy to learn ..
Stavros Korokithakis
@skorokithakis
@FWeinb i pretty much would recommend learning kicad for that
but i love kicad
although i'm not sure why you need that board, if you're making your own pcb
Tinker1
@Tinker1
Hello, anyone know if IGRR or MeNoDev are around? I was asked to post a stack trace from the 8266 occurring when a multicast session is attempted. Not exactly sure where to post the stack trace here....
Decoding 14 results0x40106752: __umodsi3 at d:\ivan\projects\arduinoesp\toolchain\dl\gcc-xtensa\build-2\xtensa-lx106-elf\libgcc/../../../libgcc/config/xtensa/lib1funcs.S line 6960x40221f37: igmp_tmr at ?? line ?0x4020bd30: ieee80211_deliver_data at ?? line ?0x40221f76: igmp_tmr at ?? line ?0x4020bd49: ieee80211_deliver_data at ?? line ?0x40221d85: igmp_input at ?? line ?0x40220000: espconn_find_current_pcb at ?? line ?0x40222774: ip_input at ?? line ?0x402214d7: etharp_find_addr at ?? line ?0x40221a82: ethernet_input at ?? line ?0x40219417: ets_snprintf at ?? line ?0x402032cb: loop_task at C:\Documents and Settings\dev\Local Settings\Application Data\Arduino15\packages\esp8266\hardware\esp8266\2.2.0\cores\esp8266/core_esp8266_main.cpp line 43 - See more at: http://www.esp8266.com/posting.php?mode=reply&f=8&t=9767#sthash.aTYWp8pl.dpuf
Me No Dev
@me-no-dev
I am around, but this seems more in @igrr 's ballpark. He is playing with gcc on windows and your trace points there.
Martin Ayotte
@martinayotte
BTW, @Tinker1 , @IGRR and @me-no-dev , it seems that this stacktrace has been seen a lot by different users trying to do UDP Multicast. I've asked many users to provide stacktrace on the forum, and it always look similar. This seems to have been introduced in 2.2.0 ...
Me No Dev
@me-no-dev
@martinayotte have you noticed it to be windows related?
Martin Ayotte
@martinayotte
@me-no-dev , I didn't faced the issue personally, since I'm not using UDP. I've just testimony what several threads figured out when I was asking users to provide decoded stacktraces ...
Ivan Grokhotkov
@igrr
@Tinker1 @martinayotte @me-no-dev This is the same as #1826. It will be resolved once we make the switch to gcc-built LwIP (#1926)
Not a Windows-specific issue btw (see this comment — same crash, but on Linux)
I'll try to find some time to push these changes today. Been preoccupied with libstdc++ on the ESP32, but hopefully will finish that stuff today.
Martin Ayotte
@martinayotte
@igrr , Oh ! ESP32 ! does someone gently gave you his own ESP31 Beta or is that Espressif feel that it is time to start shipping newer ESP32 ? :-)
Ivan Grokhotkov
@igrr
(disclosure) i now work at Espressif
Martin Ayotte
@martinayotte
Congrat ! :-) ... But still at St-Peterbourgs, or did you move in Far East ? Did you meet Sprite_tm ?
Ivan Grokhotkov
@igrr
Sprite_tm sits right across my desk :)
Martin Ayotte
@martinayotte
(I was suspecting that when you announce License switch)
Is Sprite_tm is at St-Peterbourg too, or both of you moved in China ?
Ivan Grokhotkov
@igrr
as far as libstdc++ is concerned, the difference between the 31 and 32 is mostly non-existent. So should work on 31's as well.