@ -1,33 +1,6 @@
# Example: GPIO
### Solar powered plant watering
(See the README.md file in the upper level 'examples' directory for more information about examples.)
This test code shows how to configure GPIO and how to use it with interruption.
## GPIO functions:
| GPIO | Direction | Configuration |
| ---------------------------- | --------- | ------------------------------------------------------ |
| CONFIG_GPIO_OUTPUT_0 | output | |
| CONFIG_GPIO_OUTPUT_1 | output | |
| CONFIG_GPIO_INPUT_0 | input | pulled up, interrupt from rising edge and falling edge |
| CONFIG_GPIO_INPUT_1 | input | pulled up, interrupt from rising edge |
## Test:
1. Connect CONFIG_GPIO_OUTPUT_0 with CONFIG_GPIO_INPUT_0
2. Connect CONFIG_GPIO_OUTPUT_1 with CONFIG_GPIO_INPUT_1
3. Generate pulses on CONFIG_GPIO_OUTPUT_0/1, that triggers interrupt on CONFIG_GPIO_INPUT_0/1
**Note:** The following pin assignments are used by default, you can change them by `idf.py menuconfig` > `Example Configuration` .
| | CONFIG_GPIO_OUTPUT_0 | CONFIG_GPIO_OUTPUT_1 | CONFIG_GPIO_INPUT_0 | CONFIG_GPIO_INPUT_1 |
| --------------- | -------------------- | -------------------- | ------------------- | ------------------- |
| ESP32-C2/ESP32H2| 8 | 9 | 4 | 5 |
| All other chips | 18 | 19 | 4 | 5 |
## How to use example
Before project configuration and build, be sure to set the correct chip target using `idf.py set-target <chip_name>` .
This is the code for my prototype automated plant watering system, which uses two pumps to automatically water my plants, and also monitors the ambient humidity and temperature.
### Hardware Required
@ -46,45 +19,3 @@ Run `idf.py -p PORT flash monitor` to build, flash and monitor the project.
(To exit the serial monitor, type ``Ctrl-]``.)
See the [Getting Started Guide ](https://docs.espressif.com/projects/esp-idf/en/latest/get-started/index.html ) for full steps to configure and use ESP-IDF to build projects.
## Example Output
As you run the example, you will see the following log:
```
I (317) gpio: GPIO[18]| InputEn: 0| OutputEn: 1| OpenDrain: 0| Pullup: 0| Pulldown: 0| Intr:0
I (327) gpio: GPIO[19]| InputEn: 0| OutputEn: 1| OpenDrain: 0| Pullup: 0| Pulldown: 0| Intr:0
I (337) gpio: GPIO[4]| InputEn: 1| OutputEn: 0| OpenDrain: 0| Pullup: 1| Pulldown: 0| Intr:1
I (347) gpio: GPIO[5]| InputEn: 1| OutputEn: 0| OpenDrain: 0| Pullup: 1| Pulldown: 0| Intr:1
Minimum free heap size: 289892 bytes
cnt: 0
cnt: 1
GPIO[4] intr, val: 1
GPIO[5] intr, val: 1
cnt: 2
GPIO[4] intr, val: 0
cnt: 3
GPIO[4] intr, val: 1
GPIO[5] intr, val: 1
cnt: 4
GPIO[4] intr, val: 0
cnt: 5
GPIO[4] intr, val: 1
GPIO[5] intr, val: 1
cnt: 6
GPIO[4] intr, val: 0
cnt: 7
GPIO[4] intr, val: 1
GPIO[5] intr, val: 1
cnt: 8
GPIO[4] intr, val: 0
cnt: 9
GPIO[4] intr, val: 1
GPIO[5] intr, val: 1
cnt: 10
...
```
## Troubleshooting
For any technical queries, please open an [issue ](https://github.com/espressif/esp-idf/issues ) on GitHub. We will get back to you soon.
