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Add auto channel search to espnow-proxy

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This commit is contained in:
Oleg Kalachev
2026-07-18 00:03:18 +03:00
parent 2137730a8d
commit b58c2e7c7a
1 changed files with 8 additions and 3 deletions
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tools/espnow-proxy/espnow-proxy.ino
+8 -3
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@@ -12,7 +12,7 @@
#include "../../flix/util.h"
const bool DISABLE_SWARM = true;
const int CHANNEL = 6;
const int CHANNEL = -1; // -1 means auto search
char key[ESP_NOW_KEY_LEN + 1] = {0}; // with trailing null
Preferences storage;
@@ -27,7 +27,7 @@ void onNewPeer(const esp_now_recv_info_t *info, const uint8_t *data, int len, vo
if (DISABLE_SWARM) stop = true;
Serial.printf("New peer: " MACSTR "\n", MAC2STR(info->src_addr));
ESPNOWSerial *link = new ESPNOWSerial(info->src_addr, CHANNEL, WIFI_IF_STA);
ESPNOWSerial *link = new ESPNOWSerial(info->src_addr, WiFi.channel(), WIFI_IF_STA);
link->begin();
link->setKey((const uint8_t *)key);
peers.push_back(link);
@@ -37,7 +37,6 @@ void setup() {
Serial.begin(115200);
WiFi.mode(WIFI_STA);
WiFi.setSleep(false);
WiFi.setChannel(CHANNEL);
ESP_NOW.onNewPeer(onNewPeer, NULL);
ESP_NOW.begin();
@@ -49,8 +48,14 @@ void setup() {
}
strcpy(key, storage.getString("key").c_str());
const int channels[] = {6, 1, 11, 2, 3, 4, 5, 6, 1, 11, 8, 9, 10, 11, 12, 13}; // 6, 1 and 11 are most common
int channelIndex = 0;
// Discover the first peer
while (peers.empty()) {
Serial.printf("Searching channel %d\n", channels[channelIndex]);
WiFi.setChannel(CHANNEL < 0 ? channels[channelIndex] : CHANNEL);
channelIndex = (channelIndex + 1) % (sizeof(channels) / sizeof(channels[0]));
Serial.printf("Run on Flix: espnow %s %s\n", WiFi.softAPmacAddress().c_str(), key);
delay(500);
}