Webpage managed light control using ESP-32 chip

Setup:

Espressif [2], library builder I'm using [1], original setup [3].

Note: clear IDF_PATH, PATH variables!

sudo apt-get install curl
git clone https://github.com/espressif/esp32-arduino-lib-builder
cd esp32-arduino-lib-builder
./tools/update-components.sh
./tools/install-esp-idf.sh
wget https://dl.espressif.com/dl/xtensa-esp32-elf-linux64-1.22.0-80-g6c4433a-5.2.0.tar.gz
tar -xzf xtensa-esp32-elf-linux64-1.22.0-80-g6c4433a-5.2.0.tar.gz
rm xtensa-esp32-elf-linux64-1.22.0-80-g6c4433a-5.2.0.tar.gz
export IDF_PATH="$HOME/esp32-arduino-lib-builder/esp-idf"
export PATH="$PATH:$HOME/esp32-arduino-lib-builder/xtensa-esp32-elf/bin"
# in lumus-project
make menuconfig
./build.sh
make flash

Don't forget to change device port to your own USB. For example /dev/ttyUSB0. Note: Every restart needs export. Creating custom project (on different folder). I moved every file except exported files. Then ./build.sh, make menuconfig, make flash. The file, so I don't have to export every bash opens is ~/.bashrc

Reading USB from device:

sudo apt-get install screen
#      USB port     baud rate
screen /dev/ttyUSB0 115200

Info:

GPIO RGB: 0, 16, 17 GPIO point lights (bodovky): 15 GPIO point lights on/off (bodovky): 21 MAC ubuntu 44:1c:a8:e2:b5:7f MAC ESP32 24:6f:28:b0:26:d0

References:

[1] https://github.com/espressif/esp32-arduino-lib-builder [2] https://docs.espressif.com/projects/esp-idf/en/release-v3.0/get-started/index.html [3] https://github.com/espressif/arduino-esp32/blob/master/docs/lib_builder.md [4] LED and PWM, http://arduino-er.blogspot.com/2017/06/arduino-core-for-esp32-output-pwm-to.html [5] Web Server, https://randomnerdtutorials.com/esp32-web-server-arduino-ide/ [6] UDP Sending, http://www.iotsharing.com/2017/06/how-to-use-udpip-with-arduino-esp32.html

Issues & Solutions:

DNS (link)

In file: /home/..../components/arduino/libraries/WiFi/src/WiFiSTA.cpp:491

IPAddress WiFiSTAClass::dnsIP(uint8_t dns_no)
{
if(WiFiGenericClass::getMode() == WIFI_MODE_NULL){
return IPAddress();
}
// ip_addr_t dns_ip = dns_getserver(dns_no);
// return IPAddress(dns_ip.u_addr.ip4.addr);
const ip_addr_t * dns_ip = dns_getserver(dns_no);
return IPAddress(dns_ip->u_addr.ip4.addr);
}

In file:

/home/..../components/arduino/libraries/WiFi/src/ETH.cpp:196

IPAddress ETHClass::dnsIP(uint8_t dns_no)
{
//ip_addr_t dns_ip = dns_getserver(dns_no);
//return IPAddress(dns_ip.u_addr.ip4.addr);
const ip_addr_t * dns_ip = dns_getserver(dns_no);
return IPAddress(dns_ip->u_addr.ip4.addr);
}