mirror of
https://github.com/okalachev/flix.git
synced 2026-06-28 05:56:44 +00:00
Oleg Kalachev
b316cc423a
Implement auto-pairing. Make key optional. Remove re-sends. Add command for uploading proxy to makefile.
89 lines
2.1 KiB
Arduino
89 lines
2.1 KiB
Arduino
// Copyright (c) 2026 Oleg Kalachev <okalachev@gmail.com>
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// Repository: https://github.com/okalachev/flix
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// Proxy for ESP-NOW connection
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#include <WiFi.h>
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#include <ESP32_NOW_Serial.h>
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#include <MacAddress.h>
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#include <MAVLink.h>
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#include <Preferences.h>
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#include "../../flix/util.h"
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#include <vector>
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const int CHANNEL = 6;
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char key[ESP_NOW_KEY_LEN + 1] = {0}; // with trailing null
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Preferences storage;
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std::vector<ESPNOWSerial *> peers;
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void onNewPeer(const esp_now_recv_info_t *info, const uint8_t *data, int len, void *arg) {
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if (len != 4 || memcmp(data, "flix", 4) != 0) return; // check if discovery message
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Serial.printf("New peer: " MACSTR "\n", MAC2STR(info->src_addr));
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ESPNOWSerial *link = new ESPNOWSerial(info->src_addr, CHANNEL, WIFI_IF_AP);
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link->begin();
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link->setKey((const uint8_t *)key);
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peers.push_back(link);
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}
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void setup() {
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Serial.begin(115200);
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WiFi.mode(WIFI_AP);
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WiFi.setSleep(false);
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WiFi.setChannel(CHANNEL);
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ESP_NOW.onNewPeer(onNewPeer, NULL);
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ESP_NOW.begin();
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storage.begin("espnow-proxy");
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if (!storage.isKey("key")) {
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generateRandomKey();
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storage.putString("key", key);
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}
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strcpy(key, storage.getString("key").c_str());
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// Discover the first peer
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while (peers.empty()) {
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Serial.printf("espnow %s %s\n", WiFi.softAPmacAddress().c_str(), key);
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delay(500);
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}
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}
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void generateRandomKey() {
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const char chars[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789!@#$%^&*-_+=";
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for (int i = 0; i < ESP_NOW_KEY_LEN; i++) {
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key[i] = chars[random(0, strlen(chars))];
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}
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}
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void loop() {
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uint8_t buf[5000];
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// Send from serial to ESP-NOW
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while (Serial.available() > 0) {
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int b = Serial.read();
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if (b < 0) {
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break;
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}
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mavlink_message_t msg;
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mavlink_status_t status;
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if (mavlink_parse_char(MAVLINK_COMM_0, (uint8_t)b, &msg, &status)) {
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int len = mavlink_msg_to_send_buffer(buf, &msg);
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for (ESPNOWSerial *link : peers) {
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link->write(buf, len);
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}
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}
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}
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// Send from ESP-NOW to serial
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for (ESPNOWSerial *link : peers) {
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int len = link->read(buf, sizeof(buf));
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if (len > 0) {
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Serial.write(buf, len);
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}
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}
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}
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