Description

Issue #3 implemented the flash, but the flash is too bright and possibly uses too much power. Reduce the brightness using PWM to a ~50% duty cycle (Note: the duty cycle may be changed to reach the appropriate brightness).

Requirements

• When fullness_toggle(true) the flash LED should be set to a 50% duty cycle.
• When fullness_toggle(false) the flash LED should be completely off with a 0% duty cycle.

Description

The error checking for fullness_init() and flash_init() is too verbose and needs to be improved. Create a macro to simplify this error checking.

Requirements

• In main.c create a macro that logs the error message and holds the application in an infinite loop.

Description

The functions camera_init() & camera_capture() are needed to take photos of the waste bin in order to track waste data to lower the number of waste people throw away.

Requirements

• Implement camera_init() and camera_capture() according to the specifications listed in the comments.
• Use the included library esp32-camera to take a photo.
• Always check return codes to make sure no errors have occurred.
• Adapt the following example into our source code.
• Make sure to follow the coding standard and use your best engineering judgment.

Implement fullness_init() & fullness_measure() to calculate the fullness.

Follow the Barr Embedded C Coding Standard.
Use the ESP-IDF-LIB example for assistance.

Description

PR #16 implemented fullness_measure(uint32_t *p_distance) with p_distance representing the distance from the top of the bin to the top of the trash currently inside the bin.

fullness_measure(uint32_t *p_distance) must be refactored to instead return a percentage of how full the trash is, so (Bin Height - Distance Measured) / Bin Height

Requirements

• Change the function's declaration from fullness_measure(uint32_t *p_distance) to fullness_measure(uint32_t *p_fullness)
• Have p_fullness represent how percent full the trash bin is with the valid ranges being 0-100 with 0 representing 0% & 100 representing 100%
• Change config.h and config.h.txt to have BIN_HEIGHT be represented as a unsigned int & remove MAX_US_RANGE
• Change the maximum range of ultrasonic_measure() to be BIN_HEIGHT which is defined in config.h

Description

Create boilerplate FSM in app_main to better structure the code to make it easier to maintain and develop.

Requirements

• FSM should have different states implemented using an enum.
• FSM should be able to transition to different states depending on different events.

Description

To reduce the amount of noise measured by the fullness sensor, implement exponential smoothing into fullness_measure().

Requirements

• Create a new function that takes the previous value & the raw value and returns the output of the exponential smoothing algorithm.
• Create 3+ unit tests to test the implementation with edge cases included.
• Make sure to follow the coding standard and use your best engineering judgment.

Implement flash_init() and flash_toggle() in photo.c

Follow the Barr Embedded C Coding Standard.
Look at the ESP-IDF Documentation for GPIO for assistance.

Description

The Waste Watcher needs to connect to WiFi in order to publish its sensor data to the internet.

Requirements

• Create wifi_init() and wifi_disconnect() to to connect and disconnect from the WiFi
• Connect to the WiFi network specified in the config.h header file.
• Use the ESP-IDF Documentation and the ESP-IDF example as reference
• Always check return codes to make sure no errors have occurred.
• Make sure to follow the coding standard and use your best engineering judgment.