Search found 4 matches

by x_arrange
Wed Feb 13, 2019 8:34 am
Forum: Hardware
Topic: What is the purpose of VDD3P3_RTC pin in ESP32-PICO-D4 ?
Replies: 1
Views: 125

What is the purpose of VDD3P3_RTC pin in ESP32-PICO-D4 ?

I want to understand how to keep RTC clock working while chip logic is off(if possible)

if I connect VDD3P3_RTC to 3.3V supercapacitor/battery would it be enough? Do I need also to provide 3.3V to CHIP_PU?
by x_arrange
Sat Oct 20, 2018 9:11 pm
Forum: ESP32 IDF
Topic: Optimal configuration for https client
Replies: 0
Views: 210

Optimal configuration for https client

I have simple web-site base on Apache with SSL based on self-signed certificate. And I want to write simple https client much like the one from examples. What are the optimal parameters in menuconfig to reduce memory use as much as possible? Because right know SSL subsystem eats about 80K of RAM (e....
by x_arrange
Sun Jul 08, 2018 12:27 pm
Forum: ESP32 IDF
Topic: Format SD-card connected through SPI
Replies: 0
Views: 214

Format SD-card connected through SPI

Hi all, I guess one feature is missed in SD API - ability to format it ;) I tried to use peace of code from IDF ( esp_vfs_fat_sdmmc_mount function): void *workbuf = malloc(4096); DWORD plist[] = {100, 0, 0, 0}; int ret = f_fdisk(0, plist, workbuf); ret = f_mkfs("/sdcard", FM_ANY | FM_FAT32, 16*1024,...
by x_arrange
Sat May 20, 2017 10:57 am
Forum: Sample Code
Topic: Simple BT to UART bridge
Replies: 7
Views: 4396

Simple BT to UART bridge

Hi, I have some experience with ESP8266 and HC-05. And I was kind of hoping to meet here any analog to this functionality. I have no idea what is HCI, Gatt, BT Classic, Bluedroid, etc, which are used in examples. What will be really helpful (I guess for lots of ESP32 users) is to have some "getting ...

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