Search found 10 matches

by HardwireIO
Sat Aug 19, 2017 9:35 am
Forum: ESP32 IDF
Topic: Any news on ADC linearization?
Replies: 2
Views: 1943

Re: Any news on ADC linearization?

Great! Thank you for your update!
Please keep all us updated because there're many persons interested to ADC ;)
by HardwireIO
Fri Aug 18, 2017 10:30 pm
Forum: ESP32 IDF
Topic: Any news on ADC linearization?
Replies: 2
Views: 1943

Any news on ADC linearization?

Many months ago there have been many posts about non-linear ADC characterisic. Nowadays, ADC seems to be still something useless and no work has been done to fix non-linearities. We're talking abouts errors close to 5-10% and sometimes more. Is there any news on this issue? ADC is very important for...
by HardwireIO
Wed Aug 16, 2017 6:26 am
Forum: ESP32 IDF
Topic: No data packet with promiscuous mode
Replies: 0
Views: 964

No data packet with promiscuous mode

Did anybody managed to work promiscuous mode with latest esp-idf version (mid August)?

We made thousands of different tests and callback is called only for management packets.

No way to get any data packet at all!
by HardwireIO
Tue Aug 15, 2017 6:14 am
Forum: ESP32 IDF
Topic: Send and receive custom packet
Replies: 3
Views: 3724

Re: Send and receive custom packet

Hi, I want to build a real secure mesh network without the use of standard protocol or limitation. I have seen this http://blog.podkalicki.com/esp32-wifi-sniffer/ to receive all packet with the promiscuous mode, i just need to find somthing to send custom packet, now because this work find :). I ha...
by HardwireIO
Thu Aug 03, 2017 4:13 pm
Forum: ESP32 IDF
Topic: Override lwipopts.h
Replies: 1
Views: 1289

Override lwipopts.h

We have to change some defines set on lwipopts.h but we'd like to avoid to change source code on esp-idf repository.
Is there any way to change those settings without modifying original file?
by HardwireIO
Wed May 24, 2017 9:13 pm
Forum: Hardware
Topic: [Answered] What are the ADC input ranges?
Replies: 17
Views: 43755

Re: [Answered] What are the ADC input ranges?

With 10 Bit resolution and averaging over 8 Samples, it looks now much better. The heavy linearity error is just in the -11dB range of the ADC. All ranges have the problem that they don't go down to zero, so input voltage under 0.04/0.08/0.1 Volt can't be measured without some analog offset generat...
by HardwireIO
Thu May 04, 2017 3:53 pm
Forum: ESP32 IDF
Topic: esp_wifi_connect() while running in WIFI_MODE_APSTA causes access point to close
Replies: 10
Views: 10100

Re: esp_wifi_connect() while running in WIFI_MODE_APSTA causes access point to close

We are facing absolutely the same problem. If wifi configuration is not valid, or in general ESP32 cannot connect to a wifi network, we launch an hybrid mode (WIFI_MODE_APSTA), trying to periodically connect as a station to the desired wifi network, and in the meantime launching an access point in o...
by HardwireIO
Wed Mar 08, 2017 8:41 am
Forum: ESP32 IDF
Topic: Sample code for software based timer into ESP32-idf
Replies: 15
Views: 13913

Re: Sample code for software based timer into ESP32-idf

The Interrupt WDT may be a misleading error, as I was seeing the same after the timer task stack overflowed (it seems like it gets stuck with interrupts disabled before the normal stack overflow detection has a chance to kick in). Some things you can try: Decode the backtrace by running the command...
by HardwireIO
Tue Mar 07, 2017 4:39 pm
Forum: ESP32 IDF
Topic: Sample code for software based timer into ESP32-idf
Replies: 15
Views: 13913

Re: Sample code for software based timer into ESP32-idf

I'm able to reproduce this. Will let you know once a fix is available. The problem I was seeing was a stack overflow in the timer task. Can't use printf() in the timer task! The stack overflow checking methods that work in other tasks don't appear to trigger in the timer task (I saw an interrupt wd...
by HardwireIO
Mon Mar 06, 2017 5:40 pm
Forum: ESP32 IDF
Topic: Sample code for software based timer into ESP32-idf
Replies: 15
Views: 13913

Re: Sample code for software based timer into ESP32-idf

Actually I'm facing the same problems with FreeRTOS timers: once timer is triggered, callback function is called correctly, but even though I defined an empty function, system restarts due to an access violation: Guru Meditation Error of type LoadProhibited occurred on core 0. Exception was unhandle...

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