An example that sends button status to a server on the internet over wireless

• ESP32 board
• 1x LED
• 2x Resistors
• A button / switch / piece of wire
• A breadboard

GPIOs

• 34 - Switch (active low)
• 32 - Wireless LED (active high)

1. First get a working install of ESP-IDF (see the documentation here). You will need to install the toolchain and the libraries

2. If you dont have it, save the following script to ~/esp/bootstrap.sh

#!/bin/bash
export PATH="$PATH:$HOME/esp/xtensa-esp32-elf/bin"
export IDF_PATH="$HOME/esp/esp-idf"
export PS1="\[\e[31m\][esp32]\[\e[m\] $PS1"
echo "ESP32 environment variables set"

then source it to set up your enviroment -> . ~/esp/bootstrap.sh

3. Check out the source directory and cd dramabox_http_client

4. Run make menuconfig. The main things you want to change are:

   • Your SSID / Password under Example Configuration
   • Your serial port used for programming under Serial flasher config

5. Run make flash to flash your ESP32

6. Run make monitor to see the debug logs. Ctrl-] to exit

7. Close the switch and it will call the server with the status of the switch