52 lines
1.5 KiB
C++
52 lines
1.5 KiB
C++
#include <WiFi.h>
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#include <esp_now.h>
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// MAC address of the car unit
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uint8_t carAddr[] = {0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED};
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typedef struct {
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int speed; // -255 (reverse) to 255 (forward)
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int direction; // -100 (left) to 100 (right)
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} CommandPacket;
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typedef struct {
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int currentSpeed;
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int batteryVoltage; // e.g., millivolts
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int temperature; // Celsius
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} TelemetryPacket;
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TelemetryPacket telemetry;
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void onTelemetryRecv(const uint8_t * mac, const uint8_t *incomingData, int len) {
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memcpy(&telemetry, incomingData, sizeof(telemetry));
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Serial.print("Car Speed: "); Serial.println(telemetry.currentSpeed);
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Serial.print("Batt Voltage: "); Serial.println(telemetry.batteryVoltage);
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Serial.print("Temperature: "); Serial.println(telemetry.temperature);
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}
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void setup() {
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Serial.begin(115200);
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WiFi.mode(WIFI_STA);
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if (esp_now_init() != ESP_OK) {
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Serial.println("ESP-NOW init failed!");
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return;
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}
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esp_now_peer_info_t peerInfo;
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memcpy(peerInfo.peer_addr, carAddr, 6);
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peerInfo.channel = 0;
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peerInfo.encrypt = false;
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esp_now_add_peer(&peerInfo);
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esp_now_register_recv_cb(onTelemetryRecv);
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}
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void loop() {
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CommandPacket cmd;
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// Example: Read joystick/button to determine speed/direction
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cmd.speed = analogRead(34) - 2048; // Map your analog input to desired speed
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cmd.direction = analogRead(35) - 2048; // Map to direction: left/right
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esp_now_send(carAddr, (uint8_t*)&cmd, sizeof(cmd));
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delay(100); // Adjust send rate as needed
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}
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