68 lines
2.0 KiB
C++
68 lines
2.0 KiB
C++
#include <WiFi.h>
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#include <esp_now.h>
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#include <esp_wifi.h>
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//------------------------------------------------
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// This is The Remote Unit
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//------------------------------------------------
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// RC Car Remote MAC Address: 64:E8:33:B5:D8:40
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// RC Car MAC Address: 50:78:7D:43:14:00
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//------------------------------------------------
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uint8_t carAddr[] = {0x50, 0x78, 0x7D, 0x43, 0x14, 0x00};
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typedef struct {
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int speed;
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int turn;
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} CommandPacket;
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typedef struct {
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int leftSpeed;
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int rightSpeed;
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int battery;
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} TelemetryPacket;
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TelemetryPacket telemetry;
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// The callback function now takes esp_now_recv_info_t*
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void onTelemetry(const esp_now_recv_info_t *recv_info, const uint8_t *incomingData, int len) {
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memcpy(&telemetry, incomingData, sizeof(telemetry));
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Serial.print("Left: "); Serial.println(telemetry.leftSpeed);
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Serial.print("Right: "); Serial.println(telemetry.rightSpeed);
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Serial.print("Battery: "); Serial.println(telemetry.battery);
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// Optionally, to get source MAC from recv_info:
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// Serial.printf("From MAC: %02X:%02X:%02X:%02X:%02X:%02X\n",
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// recv_info->src_addr[0], recv_info->src_addr[1], recv_info->src_addr[2], recv_info->src_addr[3], recv_info->src_addr[4], recv_info->src_addr[5]);
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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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PrintMacAddress();
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esp_now_init();
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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(onTelemetry); // Now matches new signature
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}
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void loop() {
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CommandPacket cmd;
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cmd.speed = map(analogRead(0), 0, 4095, -255, 255);
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cmd.turn = map(analogRead(1), 0, 4095, -255, 255);
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esp_now_send(carAddr, (uint8_t*)&cmd, sizeof(cmd));
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delay(100);
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}
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void PrintMacAddress() {
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delay(100); // Let hardware settle
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uint8_t mac[6];
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esp_wifi_get_mac(WIFI_IF_STA, mac); // Get MAC address for STA
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Serial.print("Car MAC Address: ");
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Serial.printf("%02X:%02X:%02X:%02X:%02X:%02X\n", mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
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}
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