Search found 351 matches

by ESP_Sprite
Fri Jan 20, 2017 1:40 am
Forum: General Discussion
Topic: Is POWER really the biggest issue here?
Replies: 1
Views: 2

Re: Is POWER really the biggest issue here?

That doesn't match my experience; I'm powering them from 3.0V all the time and they boot like a charm. Are you sure your power supply can deliver the 300-500mA that is needed for phy calibration? If not, you probably see the ESP32 brown out there.
by ESP_Sprite
Wed Jan 18, 2017 3:26 am
Forum: ESP32 HDK
Topic: WROOM-32 (DevKitC) QIO/40MHz operation keeps resetting
Replies: 3
Views: 62

Re: WROOM-32 (DevKitC) QIO/40MHz operation keeps resetting

Yes, it is a known issue. The boot code in the ROM of the ESP32 isn't directly compatible with the specific instructions the flash chip needs to use QIO mode. We are working on a workaround, expected to get into esp-idf in the coming weeks, but for now, QIO mode does not work here.
by ESP_Sprite
Wed Jan 18, 2017 2:45 am
Forum: General Discussion
Topic: [answered] feed task watchdog
Replies: 8
Views: 94

Re: [Q] feed task watchdog

Watchdogs have nothing to do with multicore-capability, all FreeRTOS functions you can use for cross-core communication should still happily be working.
by ESP_Sprite
Wed Jan 18, 2017 2:42 am
Forum: ESP32 SDK
Topic: untested functions in freertos
Replies: 2
Views: 88

Re: untested functions in freertos

We modified FreeRTOS for multi-core use, and in the process we modified a fair few functions of it. Most of the FreeRTOS functions are tested for multicore-compatibility by now, but some are not and they are marked by an assert; that is what the OP means. We've been planning to test these functions ...
by ESP_Sprite
Tue Jan 17, 2017 7:12 am
Forum: General Discussion
Topic: [answered] feed task watchdog
Replies: 8
Views: 94

Re: [Q] feed task watchdog

You can't; only the tasks that are watched can do that. In the default case, only the idle tasks are watched, and they will feed the watchdog every time you run. From this, we can conclude that your main task is hogging the CPU (by not doing something like a vTaskDelay, wait for a queue or socket, ....
by ESP_Sprite
Tue Jan 17, 2017 1:48 am
Forum: Report Bugs
Topic: Build tools for 32-bit Linux
Replies: 7
Views: 125

Re: Build tools for 32-bit Linux

That may be a bug in the SDK instead; have you confirmed that it *does* work on a 64-bit system? Either way, we'll investigate.
by ESP_Sprite
Tue Jan 17, 2017 1:44 am
Forum: General Discussion
Topic: ESP32 and CR2032 battery
Replies: 9
Views: 262

Re: ESP32 and CR2032 battery

I'd say: use a LiIon/LiPo and whack a low-quiescent-current 3.0V LDO after it to make sure the voltage doesn't get too high.
by ESP_Sprite
Tue Jan 17, 2017 1:43 am
Forum: General Discussion
Topic: ESP32 separate antennas for BT and WIFI
Replies: 4
Views: 116

Re: ESP32 separate antennas for BT and WIFI

Well, WiFi and BT actually even use the same power amp and LNA internally (and share parts of the PHY as well, if memory serves) so theoretically the only way to do it is to have an external antenna switch, software-actuated when the chip switches protocols. But if I may ask: Why would you? Both are...
by ESP_Sprite
Tue Jan 17, 2017 1:38 am
Forum: General Discussion
Topic: Request for HTTPS support
Replies: 3
Views: 71

Re: Request for HTTPS support

Rudi: I don't think that's what he means :)
Stefan: I'll poke IT, see if we can do something.
by ESP_Sprite
Mon Jan 16, 2017 1:24 am
Forum: General Discussion
Topic: ESP32 and CR2032 battery
Replies: 9
Views: 262

Re: ESP32 and CR2032 battery

The problem you're having is current supply (or actually: internal resistance), not voltage. For a random CR2032 (eg http://data.energizer.com/PDFs/cr2032.pdf), the typical Ir is mentioned as 10-40 ohm (10,000-40,000mOhm). You can look at the internal resistance as a resistance that is in series wit...

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