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by ESP_Sprite
Mon Aug 19, 2019 4:52 am
Forum: ESP32 Arduino
Topic: esp32 freezing after boot logs
Replies: 1
Views: 29

Re: esp32 freezing after boot logs

Probably a power issue. Make sure to use a good USB cable, or feed the board externally or via a powered USB hub.
by ESP_Sprite
Mon Aug 19, 2019 2:52 am
Forum: Hardware
Topic: SW_RESET continuous reboot
Replies: 4
Views: 215

Re: SW_RESET continuous reboot

What board do you use? What did you flash to the ESP32, and how? What power supply and cables are you using?
by ESP_Sprite
Mon Aug 19, 2019 2:48 am
Forum: ESP-WHO
Topic: Increasing the heap when working with AmazonFreeRTOS
Replies: 3
Views: 244

Re: Increasing the heap when working with AmazonFreeRTOS

You don't; heap essentially is all the free amount of memory you have left, you can't expand it. Just make sure you're not using up heap space elsewhere, or are doing silly stuff like filling the entire internal memory when you still have PSRAM left where you can move stuff to.
by ESP_Sprite
Mon Aug 19, 2019 2:41 am
Forum: Hardware
Topic: very accurate clock
Replies: 3
Views: 145

Re: very accurate clock

A VCXO would work fine then. Do note that the RTC internal to the ESP32 has no battery backup option, though; if the ESP32 loses power, it also loses it's understanding of the time. If you need this, it's probably better to go the external RTC route.
by ESP_Sprite
Mon Aug 19, 2019 2:38 am
Forum: General Discussion
Topic: HSPI and VSPI, meaning thereof?
Replies: 10
Views: 10453

Re: HSPI and VSPI, meaning thereof?

Yes, both are hardware peripherals, and (apart from some details wrt what pins to use if you need to go *really* fast) they are fully interchangable.
by ESP_Sprite
Sun Aug 18, 2019 5:52 am
Forum: ESP32 IDF
Topic: HTTPS library pulls wrong characters?
Replies: 1
Views: 57

Re: HTTPS library pulls wrong characters?

If anything, esp_http_client_read doesn't zero-terminate the string it receives; instead, it returns its length as the return value. ESP_LOG, however, assumes the string is zero-terminated. As it is not, ESP_LOG will happily print any crap that's after the end of the string, including perhaps a back...
by ESP_Sprite
Sun Aug 18, 2019 5:46 am
Forum: Hardware
Topic: Max bit size possible to read over SPI?
Replies: 5
Views: 197

Re: Max bit size possible to read over SPI?

In one transaction (I think you call that a frame; the time when CS is active), you can send/receive any amount of bits, from 1 bit all the way up to 16777215 bits (however, you don't have enough RAM to store the latter amount), and anything in between, with a granularity of 1 bit. As such, 32 bits ...
by ESP_Sprite
Fri Aug 16, 2019 11:10 am
Forum: ESP32 Arduino
Topic: Are all ESP32's created the same??
Replies: 10
Views: 1875

Re: Are all ESP32's created the same??

We would certainly applaud anyone who tries, but the reality of having two cores and a plethora of complex communication protocols (WiFi, BT, BLE) plus the layers on top of it (LWIP) make it much, much easier to approach problems from a thead-based point of view, hence our choice of FreeRTOS instead...
by ESP_Sprite
Fri Aug 16, 2019 11:01 am
Forum: Hardware
Topic: ESP32 VIN pin as 5V output
Replies: 5
Views: 225

Re: ESP32 VIN pin as 5V output

Yep, it worked hahaha :D So the ESP32 DOES have 3.3v and 5v output. Much thanks! Note that the ESP32 itself does not. Your devboard probably has a secondary chip to allow it to work on 5V as well, but the ESP32 by itself will malfunction and potentially release the magic smoke when you try to power...
by ESP_Sprite
Fri Aug 16, 2019 10:57 am
Forum: Hardware
Topic: Max bit size possible to read over SPI?
Replies: 5
Views: 197

Re: Max bit size possible to read over SPI?

SPI itself doesn't have the concept of 'word size', it just reads in a stream of bits. The ESP32 hardware then reformats these bits into 32-bit words, but that's just a method of storing information. As you can store a bitstream that is as big as the ESP32's free memory, the bit size is more-or-less...

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