mirror of
https://github.com/alexandrebobkov/ESP-Nodes.git
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79 lines
1.9 KiB
ReStructuredText
79 lines
1.9 KiB
ReStructuredText
TRANSMITTER
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===========
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Configuration Variables
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-----------------------
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.. code-block:: c
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uint8_t receiver_mac[ESP_NOW_ETH_ALEN] = {0xe4, 0xb0, 0x63, 0x17, 0x9e, 0x44};
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typedef struct {
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int x_axis; // Joystick x-position
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int y_axis; // Joystick y-position
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bool nav_btn; // Joystick push button
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bool led; // LED ON/OFF state
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uint8_t motor1_rpm_pwm; // PWMs for each DC motor
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uint8_t motor2_rpm_pwm;
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uint8_t motor3_rpm_pwm;
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uint8_t motor4_rpm_pwm;
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} __attribute__((packed)) sensors_data_t;
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Reading Joystick x- and y- Axis Values
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--------------------------------------
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Sending & Ecapsulating Data
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----------------------------
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.. code-block:: c
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void sendData (void) {
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... ... ...
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... ... ...
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buffer.x_axis = x_axis;
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buffer.y_axis = y_axis;
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// Call ESP-NOW function to send data (MAC address of receiver, pointer to the memory holding data & data length)
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uint8_t result = esp_now_send((uint8_t*)receiver_mac, (uint8_t *)&buffer, sizeof(buffer));
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... ... ...
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... ... ...
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}
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Main Function
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-------------
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.. code-block:: c
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#include "freertos/FreeRTOS.h"
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#include "nvs_flash.h"
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#include "esp_err.h"
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... ... ...
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... ... ...
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void app_main(void) {
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... ... ...
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... ... ...
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// Initialize internal temperature sensor
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chip_sensor_init();
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// Initialize NVS
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esp_err_t ret = nvs_flash_init();
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if (ret == ESP_ERR_NVS_NO_FREE_PAGES || ret == ESP_ERR_NVS_NEW_VERSION_FOUND) {
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ESP_ERROR_CHECK( nvs_flash_erase() );
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ret = nvs_flash_init();
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}
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ESP_ERROR_CHECK( ret );
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wifi_init();
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joystick_adc_init();
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transmission_init();
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system_led_init();
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... ... ...
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... ... ...
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} |