AVR-IoT WG
The AVR-IoT WG is a Wi-Fi development board from Microchip based on the ATmega4808 AVR microcontroller and uses the WINC1510 Wi-Fi SmartConnect IoT module. The board features onboard sensors for measuring ambient temperature and ambient light.
Project Specifics
AVR-IoT WG projects start with the following sensor elements imported from the Element Library:
Microchip MCP9808
Vishay TEMT6000
As is standard with any project type that uses Wi-Fi, cloud elements are accessible from both the Embedded and Application tabs in Atmosphere Studio.
Hardware Specifics
Some devices may have limitations or design restrictions that cause unexpected behavior when used with Atmosphere. Specific information and details pertaining to the AVR-IoT WG and its performance on Atmosphere is noted below.
- The AVR-IoT WG does not support UART regular expressions
- The AVR-IoT WG has very little flash space so project complexity must be kept to a minimum. If you experience a continuous reboot cycle while using the device, the project on it is likely too big.
Onboard LED Behavior
The Wi-Fi LED will turn on once the Wi-Fi driver has been initialized. This is a good indicator that the board is on and running properly. The CONN LED will be solid if the AVR-IoT WG is in station mode and connected to an access point.
Switch Behavior
Hold SW0 while powering on the board until the Wi-Fi LED turns on. This will erase Atmosphere provisioning data, putting the device back into provisioning mode.
Default Pin Mapping
Atmosphere configures each peripheral to a default pin for every supported device, based on ideal pairing of pins and their usage. The default pin configuration is set for convenience and enables each peripheral to work naturally without needing to be modified.
All pins can be used as general purpose input/output (GPIO) unless otherwise specified.
AVR-IoT WG projects start with the following pin configuration:
Pin Table
| Pin | Description | Notes |
|---|---|---|
P_AN |
Analog Pin | Maps to PD7 |
P_RST |
Reset Pin | Maps to PA0 |
P_CS |
SPI Chip Select Pin | Maps to PC3 |
P_SCK |
SPI Clock Pin | Maps to PA6 |
P_SDO |
SPI MISO Pin | Maps to PA5 |
P_SDI |
SPI MOSI Pin | Maps to PA4 |
P_INT |
Interrupt Pin | Maps to PA4 |
P_PWM |
PWM Pin | Maps to PD4 |
P_UART_RX |
UART RX Pin | Maps to PC1 |
P_UART_TX |
UART TX Pin | Maps to PC0 |
P_SCL |
I2C SCL Pin | Maps to PA3 |
P_SDA |
I2C SDA Pin | Maps to PA2 |
P_LED_WIFI |
WIFI LED | Maps to PD3. Used internally. |
P_LED_CONN_STATUS |
CONN LED | Maps to PD2. Used internally. |
P_LED_DATA_XFER |
DATA LED | Maps to PD1. Free to be used by user. |
P_LED_ERR_STATUS |
ERR LED | Maps to PD0. Free to be used by user. |
P_SW1 |
Switch 0 (Labeled SW0) | Maps to PF5 |
P_SW2 |
Switch 1 (Labeled SW1) | Maps to PF6 |
P_LIGHT_SENS |
Light Sensor Input Pin | Maps to PD5 |
The default pin for any peripheral can be changed within an element's properties, from an element that references that particular peripheral.
Peripherals
Below is information regarding the AVR-IoT WG’s exposed peripherals.
I2C
I2C1
This I2C bus is exposed via the P_SDA and P_SCL pins on the click connector.
SPI
SPI1
This SPI bus is exposed via the P_SDO, P_SDI, and P_SCK pins on the click connector.
UART
UART1
This UART is exposed via the USB connector as well as the P_UART_RX and P_UART_TX pins on the click connector.
Programming Method
Programming the AVR-IoT WG involves downloading its project firmware from Atmosphere Studio and directly transferring it to the device over USB.
Setup Configuration
Prior to programming a AVR-IoT WG, ensure you have the following setup configuration:
- The device is connected to the computer via USB. It will display as a mass storage device.
- The project to be programmed has been compiled.
Programming Instructions
With setup complete, you can program the AVR-IoT WG:
- From Atmosphere Studio’s Embedded tab, click the
button from the tab’s toolbar. This downloads a .hex file containing the project’s compiled firmware. - Locate the downloaded file on your computer, and move it into the AVR-IoT WG mass storage device. This initiates programming of the AVR-IoT WG, which is represented by a series of blinking LEDs and then it will reboot.
The blue LED will then turn on, followed by the yellow LED. This indicates the device is programmed with the project’s embedded firmware.
Guides and Tutorials
Get started using the AVR-IoT WG with Atmosphere by walking through the following guides:
| AVR-IoT WG Guides |
|---|
| Getting Started with AVR-IoT WG |
| Creating a Monitoring Solution |
Demo Projects
Atmosphere includes a variety of AVR-IoT WG demo projects for users of all levels. Check them out by clicking the demo’s name to open the project in Atmosphere.
| Name | Description | |
|---|---|---|
| Onboard Sensor Demo | An embedded-to-cloud demo that showcases the onboard sensors of the AVR-IoT WG. Measure temperature and light data then send it to the cloud. If the light value exceeds a set limit, the device goes into an alarming state. | |
| AVR-IoT Light Monitor Demo | AVR-IoT WG | This demo reads ambient light data from the onboard sensor, and when the light value is exceeded beyond a certain point, changes the device’s status in the cloud and sends a system notification. |
| Debug Print AVR-IoT Demo | The debug print element is used within this demo project by reading the onboard sensor values and printing them on the debug console. |
Videos
The Atmosphere video library contains the following videos on the AVR-IoT WG:
Resources
The following additional resources and downloadable files are available for the AVR-IoT WG:
