Search found 37 matches

by luisonoff
Thu Apr 11, 2019 8:50 am
Forum: ESP32 IDF
Topic: ESP32 Unable to get IP from Server in Native_OTA
Replies: 2
Views: 366

Re: ESP32 Unable to get IP from Server in Native_OTA

I recently faced very similar problem and it was caused by our DHCP service not providing IP to some MACs or something like that. Recommend you try same code but connecting to a different wifi network just to check that it is now caused by that wifi network, for example I checked this using wifi hot...
by luisonoff
Mon Apr 08, 2019 8:47 am
Forum: Hardware
Topic: SYSTEM_EVENT_STA_GOT_IP never received, other units work, Wrover-B defective?
Replies: 2
Views: 464

Re: SYSTEM_EVENT_STA_GOT_IP never received, other units work, Wrover-B defective?

We found out the problem!!! After some investigation we found out our DHCP server in my company was working erratically, not giving IP to some specific MAC addresses, but working ok with the vast majority. No idea why. We have Windows Server 2012, we removed the option of DHCP redundancy and restart...
by luisonoff
Mon Apr 08, 2019 8:46 am
Forum: ESP32 IDF
Topic: Can't get IP (intermittent)
Replies: 3
Views: 936

Re: Can't get IP (intermittent)

Note for future finders of this topic: I was also facing a very similar problem, where one of my units was not getting the GOT_IP event after connecting to wifi. After some investigation we found out our DHCP server in my company was working erratically, not giving IP to some specific MAC addresses...
by luisonoff
Wed Apr 03, 2019 8:31 am
Forum: Hardware
Topic: SYSTEM_EVENT_STA_GOT_IP never received, other units work, Wrover-B defective?
Replies: 2
Views: 464

Re: SYSTEM_EVENT_STA_GOT_IP never received, other units work, Wrover-B defective?

Added some debug logs to github issue, still no idea of why just one of my 4 units is not getting the IP event but seems to be connecting OK to wifi.

https://github.com/espressif/esp-idf/issues/3244


Any help or hint is much appreciated, thank you. :)
by luisonoff
Tue Apr 02, 2019 7:40 am
Forum: Hardware
Topic: SYSTEM_EVENT_STA_GOT_IP never received, other units work, Wrover-B defective?
Replies: 2
Views: 464

SYSTEM_EVENT_STA_GOT_IP never received, other units work, Wrover-B defective?

-- I also opened same issue on github -- https://github.com/espressif/esp-idf/issues/3244 Hello, Please help me debug this issue, right now I believe we got a defective Wrover-B module, but don't know how to confirm this. At my company, Sistel, we are at the final stage of product development using ...
by luisonoff
Thu Feb 28, 2019 9:34 am
Forum: General Discussion
Topic: Performance benchmark compared to Cortex M4 series
Replies: 5
Views: 3524

Re: Performance benchmark compared to Cortex M4 series

I did a very similar comparison in terms of performance and energy consumption with info and tests gathered from the internet a while ago... can't find my notes on that. If I remember correctly, the "only" good things about Xtensa and ESP32 were the price, the higher clock and dual core, and of cour...
by luisonoff
Fri Feb 01, 2019 11:39 am
Forum: ESP32 IDF
Topic: v3.0 to v3.1 migration guide? WiFi not working...
Replies: 29
Views: 3283

Re: v3.0 to v3.1 migration guide? WiFi not working...

If you are not finding here the support you expected, try creating a new issue on the IDF github repository, attaching everything you can and logs and code and how it is failing, etc. I am sure they will take a look at it, please be patient because it is chinese new year holiday, until February 15th...
by luisonoff
Fri Dec 14, 2018 9:26 am
Forum: Hardware
Topic: How to power the 3.3V ESP32 from a 3.7V Li-ion battery?
Replies: 14
Views: 5073

Re: How to power the 3.3V ESP32 from a 3.7V Li-ion battery?

This is effiency of TPS62136
Image
Image

From 0.5mA to 2.5A it is above 90%, with a maximum of 96% at 500mA. But at 20uA it is only 40%.
by luisonoff
Fri Dec 14, 2018 9:19 am
Forum: Hardware
Topic: How to power the 3.3V ESP32 from a 3.7V Li-ion battery?
Replies: 14
Views: 5073

Re: How to power the 3.3V ESP32 from a 3.7V Li-ion battery?

XC6203 is a good option, I didn't know about TorexSemi, thanks. Quite SMALL actually (3x3mm plus 2 capacitors) and easier to solder by hand and quite GOOD for deepsleep because dropout and supply current at low output current are very small. BUT bear in mind that it has a maximum output of 400mA, be...
by luisonoff
Fri Dec 14, 2018 8:05 am
Forum: Hardware
Topic: How to power the 3.3V ESP32 from a 3.7V Li-ion battery?
Replies: 14
Views: 5073

Re: How to power the 3.3V ESP32 from a 3.7V Li-ion battery?

I use Texas TPS62136 buck switching converter and I am very happy.
The full solution with caps and resistors needed is a bit large (7x7 or 8x8 mm), but it is extremely efficient, the best option I know of right now. Cost is around 2-3 eur for the entire solution.

Anyone using a better option?

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