ESP32 Azure IoT Kit

This is Work in progress

This board is no longer manufactured but in case you have it arround here you find details.

The ESP32 based board is equipped with some interesting sensors, buttons, leds and a display and can easily be used for development.

I2C bus

The sensors and the display are reachable on the I2C bus using the signals (sda=25, scl=26).

The env.json configuration includes these settings in the Device Element.

LEDs

There are 2 green LEDs available:

• The LED labeled “Azure” is available on GPIO 33.
• The LED labeled “WiFi” is available on GPIO 32.

Both LEDs are not connected directyl but through a small MOSFET that inverts the signal. The LEDs will light up when the signal level is HIGH.

{
  "digitalout": {
    "led-azure": {
      "value": "1",
      "title": "digitalout/led-azure",
      "pin": "33"
    },
    "led-wifi": {
      "value": "1",
      "title": "digitalout/led-wifi",
      "pin": "32"
    }
  }
}

Input Buttons

There are 2 buttons available

• The left button is bound to the RESET of the CPU chip.
• The right button is available on GPIO pin 0.

The right button is pulling the input level to LOW when pressed.

The env.json configuration includes the settings using the Digitalin Element.

Buzzer

The buzzer on board is connected to pin 27. This is a passive speaker that can be used with the Tone Element to make some noise.

The env.json configuration includes these settings in the Tone Element.

Ambient Light Sensor BH1750

This sensor is available on the i2c bus on address 0x23 (default).

In the description of the BH1750 Element you can find more details.

The env.json configuration includes these settings in the BH1750 Element.

Motion Sensor MPU6050

3-axis gyroscope, 3-axis accelerometer

This sensor is available on the i2c bus on address 0x68.

• https://invensense.tdk.com/products/motion-tracking/6-axis/mpu-6050/
• https://invensense.tdk.com/wp-content/uploads/2015/02/MPU-6000-Datasheet1.pdf

Barometer FBM320

0x6D

Magnetometer MAG3110

0x0E

Humidity and Temperature Sensor HTS221

0x5F

Battery charging

SD Card

The SD card is available at the standard SPI bus of ESP32. The SD Card Element can be used to extend the filesystem and to mount the sd card file system on the /sd folder.

Device Configuration

This is a device specific configuration for this board :

{
  "device": {
    "0": {
      "name": "azurekit",
      "title": "Azure Kit",
      "description": "ESP32 Azure IoT Kit by Espressif",
      "button": "0",
      "led": "33",
      "i2c-SDA": "25",
      "i2c-SCL": "26",
      "i2c-frequency": "50000"
    }
  },
  "ota": {
    "0": {
      "port": 8266,
      "passwd": "123"
    }
  },
  "diag": {
    "0": {}
  },
  "ntptime": {
    "on": {
      "zone": "CET-1CEST,M3.5.0,M10.5.0/3"
    }
  },
  "displayssd1306": {
    "0": {
      "address": "60",
      "xresetpin": "D6",
      "brightness": "80",
      "xrotation": 90,
      "width": 128,
      "height": 64
    }
  },

  "digitalin": {
    "key": {
      "pin": "0"
    }
  },

  "tone": {
    "on": {
      "pin": "27",
      "tones": "fifth:d=4,o=4,b=80:8p,8g,8g,8g,2d#,8p,8f,8f,8f,1d"
    }
  }

}

ESP32 WROVER Module

Compile with

OLED Display

SSD1306

• 0x3c: (SH1106,SSD1306,SSD1309)

• The SSD1306 based display requires a reset line for some cases but the RST signal is not connected to any GPIO.

https://forum.arduino.cc/t/how-to-best-configure-esp32-arduino-vs-code-debug/698140

https://www.esp32.com/viewtopic.php?t=23393

See also

• Microsoft IoT Azure-Samples

• ESP32IoTCentral

• https://www.digikey.de/de/products/detail/espressif-systems/ESP32-AZURE-IOT-KIT/10259357

• https://www.espressif.com/en/products/devkits/esp32-azure-kit/resources

• https://docs.microsoft.com/en-us/samples/azure-samples/esp32-iot-devkit-get-started/sample/

• https://www.bing.com/aclk?ld=e84j1SJUdrrMrkgMfjTDnMvjVUCUwkCsE4dWcgS9pQq1t7lxzMiLJZsrlrkH7Yl5Vko_nFddX8x9Re3CJJJyBl9i1n_se_rY4iVSzRUsWck47IXclY7tu6rVGkRyKRrG6g2yLFlEI2po4MOFSkAx42hnNFZ42usVhyS2kStKWdk1tOcz8GFBGOjlciMOryC02iJRHvoA&u=aHR0cHMlM2ElMmYlMmZhenVyZS5taWNyb3NvZnQuY29tJTJmZGUtZGUlMmZzZXJ2aWNlcyUyZmlvdC1odWIlMmYlM2ZPQ0lEJTNkQUlEMjEwMDA0OV9TRU1fMTZlY2NkYjMxYzIyMTliZjhhYzRhZGY1MDE1M2Q0ZTIlM2FHJTNhcyUyNmVmX2lkJTNkMTZlY2NkYjMxYzIyMTliZjhhYzRhZGY1MDE1M2Q0ZTIlM2FHJTNhcyUyNm1zY2xraWQlM2QxNmVjY2RiMzFjMjIxOWJmOGFjNGFkZjUwMTUzZDRlMg&rlid=16eccdb31c2219bf8ac4adf50153d4e2&ntb=1

• https://www.esp32.com/viewtopic.php?t=10978

• Kauf: https://www.mouser.de/ProductDetail/Espressif-Systems/ESP32-Azure-IoT-Kit/?qs=PqoDHHvF64%2BuVX1eLQkvaQ==

• https://www.espressif.com/en/news/Microsoft_Plug-and-Play_with_ESP32-Azure_IoT_Kit?position=2&list=5lhO4nzwU4M75DgLB1L8bi8c49nLFSieLWkTJ_miAdk

• https://buildazure.com/esp32-azure-iot-kit-dev-board-espressif/

• https://github.com/espressif/esp-iot-solution/blob/master/examples/esp32_azure_iot_kit/readme_en.md

• https://www.espressif.com/sites/default/files/documentation/esp32-azure_iot_kit_hardware_design_guide__en.pdf

https://www.espressif.com/sites/default/files/documentation/esp32-azure_iot_kit_hardware_design_guide__en.pdf

https://github.com/lzyms/ESP32IoTCentral

https://github.com/ewertons/esp32-azureiotkit-sensors

https://iotexpert.com/debugging-ssd1306-display-problems/

Microsoft Tutorial: Connect an ESPRESSIF ESP32-Azure IoT Kit to IoT Hub

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