Search found 31 matches

by danny@cs.huji.ac.il
Sat Jun 15, 2019 9:26 am
Forum: ESP-IDF
Topic: need help with ttgo camera and display board
Replies: 1
Views: 2835

need help with ttgo camera and display board

Hi,
I managed to hack https://github.com/igrr/esp32-cam-demo to recognize the ov2640
but the jpeg I get is 'unparsable',
it start with 0xff 0xb6 0xff 0x38, so it seems something is wrong :-)
thanks,
danny
by danny@cs.huji.ac.il
Fri Oct 12, 2018 1:57 pm
Forum: ESP-IDF
Topic: pn532 rfid module via i2c is not working
Replies: 0
Views: 2506

pn532 rfid module via i2c is not working

hi,
I'm trying an NFC pn532 module via i2c and getting ESP_ERR_TIMEOUT
BTW, I also tried Kolban's i2c scanner with the same result.
also, i'm using esp-idf v3.1

using the i2c with an oled display works.

so any help?

thanks,
danny
by danny@cs.huji.ac.il
Mon Feb 05, 2018 10:17 am
Forum: Hardware
Topic: looking for mh-et live esp32 minikit schematics
Replies: 0
Views: 3766

looking for mh-et live esp32 minikit schematics

Hi, I have the some mh-et live esp32 minikit , and a very similar Wemos mini32, both have 'similar' pin out, I am trying to power them not via the mini usb, but using either the 3.3 pin, or the vnc pin, with different results, so does any one know how to do this correctly? - i'm a programmer, with s...
by danny@cs.huji.ac.il
Fri Jan 05, 2018 6:41 am
Forum: ESP-IDF
Topic: is there a cold restart/reboot?
Replies: 2
Views: 9167

Re: is there a cold restart/reboot?

the idf is quite resent, from master about a week ago. I have several boards, and the symptomes are not identical, this particular one, hangs very often in the same spot, i'll try to attach the console output. I have seen in the past, when I was playing with pwm, that after a reboot the pwm went on ...
by danny@cs.huji.ac.il
Thu Jan 04, 2018 12:13 pm
Forum: ESP-IDF
Topic: is there a cold restart/reboot?
Replies: 2
Views: 9167

is there a cold restart/reboot?

In certain cases I need to reboot the esp32, i.e. after a firmware update (via OTA)
but using esp_restart() not always works, mainly it either hangs, or some wierd leftovers
are there. hitting the reset button helps.

So my question is, is there some software brute force reboot?

thanks,
danny
by danny@cs.huji.ac.il
Fri Dec 22, 2017 9:43 am
Forum: Hardware
Topic: esp32 Mini kit power
Replies: 0
Views: 2656

esp32 Mini kit power

Hi, don't realy know if this is the right forum, but taking my chance :-) I have the little board 'esp32 MiniKIT/MH-ET LIVE. but can't find the schematics of it, I want to power it NOT via the mini USB connector, using the 3.3v connector but no luck. If I power it via the usb it's working ok, so I h...
by danny@cs.huji.ac.il
Mon Sep 04, 2017 9:02 am
Forum: ESP-IDF
Topic: uart_flush(...) causes problems
Replies: 1
Views: 3301

uart_flush(...) causes problems

Hi,
I am developing an app that can be used to link a serial to ethernet unsing the esp32.
i'm using port 23/telnet, and the first time I connect all is great, but a second
attempt fILES, and I have traced it to a call to uart_flush(port), commenting it, now
all is peachy.
by danny@cs.huji.ac.il
Sat Aug 19, 2017 3:43 pm
Forum: ESP-IDF
Topic: very slow connecting when esp is an access point
Replies: 5
Views: 9203

Re: very slow connecting when esp is an access point

wireshark did it!! Thanks Neil and Martin the macbook I am using to connect to the esp, is trying to talk to a dns server to resolve ip to name, which when connecting to the esp via wireless, has no other connectivity! and was trying severl resolvers and timing out, till enevtually would give up and...
by danny@cs.huji.ac.il
Sat Aug 19, 2017 3:03 pm
Forum: ESP-IDF
Topic: very slow connecting when esp is an access point
Replies: 5
Views: 9203

Re: very slow connecting when esp is an access point

if the esp is connected to another AP, the telnet connection is very fast. it's only when the esp is acting as an AP, that connecting to it is very slow, I will try later to run wireshark. as to code snip, its pretty standard, it's either started as WIFI_MODE_AP, or WIFI_MODE_STA, the rest of the co...
by danny@cs.huji.ac.il
Sat Aug 19, 2017 9:57 am
Forum: ESP-IDF
Topic: very slow connecting when esp is an access point
Replies: 5
Views: 9203

very slow connecting when esp is an access point

when configuring the esp32 as an access point, it appears very quickly, selecting it is also very fast, i.e, the client gets an ip (192.168.4.2), but connecting to for example via 'telnet 192.168.4.1' takes more than 60s! and yes my app is listening on port 23/tcp BTW, i'm using esp-idf 3.0 any idea...