mirror of
https://github.com/alexandrebobkov/ESP-Nodes.git
synced 2025-11-04 00:58:28 +00:00
94 lines
2.4 KiB
ReStructuredText
94 lines
2.4 KiB
ReStructuredText
RECEIVER
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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 transmitter_mac[ESP_NOW_ETH_ALEN] = {0x9C, 0x9E, 0x6E, 0x14, 0xB5, 0x54};
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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_bttn; // Joystick push button
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bool led; // LED ON/OFF state
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uint8_t motor1_rpm_pwm; // PWMs for 4 DC motors
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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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.. code-block:: c
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struct motors_rpm {
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int motor1_rpm_pwm;
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int motor2_rpm_pwm;
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int motor3_rpm_pwm;
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int motor4_rpm_pwm;
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};
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Receiving & Extracting Data
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--------------------------------
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.. code-block:: c
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void onDataReceived (const uint8_t *mac_addr, const uint8_t *data, uint8_t data_len) {
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... ... ...
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... ... ...
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ESP_LOGI(TAG, "Data received from: %02x:%02x:%02x:%02x:%02x:%02x, len=%d", mac_addr[0], mac_addr[1], mac_addr[2], mac_addr[3], mac_addr[4], mac_addr[5], data_len);
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memcpy(&buf, data, sizeof(buf));
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x_axis = buf.x_axis;
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y_axis = buf.y_axis;
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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 <string.h>
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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 NVS
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esp_err_t ret = nvs_flash_init();
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if (ret == ESP_ERR_NVS_NO_FREE_PAGES ||
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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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ESP_ERROR_CHECK(esp_now_init());
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esp_now_peer_info_t transmitterInfo = {0};
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memcpy(transmitterInfo.peer_addr, transmitter_mac, ESP_NOW_ETH_ALEN);
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transmitterInfo.channel = 0; // Current WiFi channel
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transmitterInfo.ifidx = ESP_IF_WIFI_STA;
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transmitterInfo.encrypt = false;
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ESP_ERROR_CHECK(esp_now_add_peer(&transmitterInfo));
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ESP_ERROR_CHECK(esp_now_register_recv_cb((void*)onDataReceived));
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system_led_init();
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... ... ...
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... ... ...
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} |