Core2, W5500 and ESP-IDF example eth2ap

sheepDog

Hello,

I like to use a Core2 as Wifi-AP for some small sensors. My starting point was the eth2ap example from ESP-IDF v4.3.2. I added some outputs to the example to see was going on. I changed FLOW_CONTROL_QUEUE_TIMEOUT_MS to 500:

#define FLOW_CONTROL_QUEUE_TIMEOUT_MS (5*100)
#define FLOW_CONTROL_QUEUE_LENGTH (40)
#define FLOW_CONTROL_WIFI_SEND_TIMEOUT_MS (100)

typedef struct {
    void *packet;
    uint16_t length;
} flow_control_msg_t;

// Forward packets from Wi-Fi to Ethernet
static esp_err_t pkt_wifi2eth(void *buffer, uint16_t len, void *eb)
{
    if (s_ethernet_is_connected) {
        if (esp_eth_transmit(s_eth_handle, buffer, len) != ESP_OK) {
            ESP_LOGE(TAG, "Wifi->ETH: Ethernet send packet failed");
        }
    }
    esp_wifi_internal_free_rx_buffer(eb);
    return ESP_OK;
}

// Forward packets from Ethernet to Wi-Fi
// Note that, Ethernet works faster than Wi-Fi on ESP32,
// so we need to add an extra queue to balance their speed difference.
static esp_err_t pkt_eth2wifi(esp_eth_handle_t eth_handle, uint8_t *buffer, uint32_t len, void *priv)
{
    esp_err_t ret = ESP_OK;
    flow_control_msg_t msg = {
        .packet = buffer,
        .length = len
    };
    if (xQueueSend(flow_control_queue, &msg, pdMS_TO_TICKS(FLOW_CONTROL_QUEUE_TIMEOUT_MS)) != pdTRUE) {
        ESP_LOGE(TAG, "ETH->Wifi: send flow control message failed or timeout, length=%d", len);
        free(buffer);
        ret = ESP_FAIL;
    }
    return ret;
}

// This task will fetch the packet from the queue, and then send out through Wi-Fi.
// Wi-Fi handles packets slower than Ethernet, we might add some delay between each transmitting.
static void eth2wifi_flow_control_task(void *args)
{
    flow_control_msg_t msg;
    int res = 0;
    uint32_t timeout = 0;
    while (1) {
        if (xQueueReceive(flow_control_queue, &msg, pdMS_TO_TICKS(FLOW_CONTROL_QUEUE_TIMEOUT_MS)) == pdTRUE) {
            timeout = 0;
            if (s_sta_is_connected && msg.length) {
                do {
                    vTaskDelay(pdMS_TO_TICKS(timeout));
                    timeout += 2;
                    res = esp_wifi_internal_tx(WIFI_IF_AP, msg.packet, msg.length);
                } while (res && timeout < FLOW_CONTROL_WIFI_SEND_TIMEOUT_MS);
                if (res != ESP_OK) {
                    ESP_LOGE(TAG, "ETH->WiFi: send packet failed: %d, timeout=%d, length=%d", res, timeout, msg.length);
                }
                else {
                    ESP_LOGI(TAG, "ETH->WiFi: send packet ok: %d, timeout=%d, length=%d", res, timeout, msg.length);
                }
            }
            free(msg.packet);
        }
    }
    vTaskDelete(NULL);
}

It worked sometimes: If I send 10 pings, 2-3 reached the server. I cann't used a browser to show some small html-page.
My output is:

I (14004) wifi:new:<1,0>, old:<1,1>, ap:<1,1>, sta:<255,255>, prof:1
I (14004) wifi:station: 5e:6c:e2:e0:0f:66 join, AID=1, bgn, 20
I (14034) eth_example: Wi-Fi AP got a station connected
I (14074) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=60
I (14104) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=60
I (14174) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=60
I (14204) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=60
E (16534) eth_example: ETH->WiFi: send packet failed: 12309, timeout=100, length=60
I (16534) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=60
I (16534) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=60
I (16544) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=60
I (16554) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=590
I (16554) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=60
I (16564) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=60
I (16574) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=60
I (16584) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=86
I (16584) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=295
I (16594) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=60
I (16604) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=770
I (16614) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=60
I (16614) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=1314
I (16624) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=86
I (16634) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=88
I (16644) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=60
I (16644) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=590
I (16654) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=812
I (16664) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=832
I (16674) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=316
I (16674) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=336
I (16684) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=1168
I (16694) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=1188
I (16704) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=1398
I (16704) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=1418
I (16714) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=86
E (18974) eth_example: ETH->WiFi: send packet failed: 12309, timeout=100, length=60
I (18974) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=60
I (18974) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=60
I (18984) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=60
I (18994) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=60
I (18994) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=60
I (19004) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=60
I (19014) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=60
I (19014) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=60
I (19024) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=88
I (19034) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=74
I (19044) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=60
I (19044) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=590
I (19054) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=60
I (19064) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=60
E (21324) eth_example: ETH->WiFi: send packet failed: 12309, timeout=100, length=60
I (21324) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=60
I (21324) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=60
I (21334) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=60
I (21344) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=316
I (21344) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=336
I (21354) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=590
I (21364) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=812
I (21374) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=832
I (21374) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=1398
I (21384) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=1418
I (21394) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=1168
I (21404) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=1188
I (21404) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=60
I (21414) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=60
I (21424) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=60
I (21434) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=88
I (21434) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=107
I (21444) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=131
I (21454) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=86
I (21464) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=60
I (21464) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=86
I (21474) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=86
I (21484) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=60
I (21494) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=60
I (21494) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=705
I (21504) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=60
I (21514) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=60
E (22494) eth_example: ETH->Wifi: send flow control message failed or timeout, length=832
E (22994) eth_example: ETH->Wifi: send flow control message failed or timeout, length=1398
E (23494) eth_example: ETH->Wifi: send flow control message failed or timeout, length=1418
E (23774) eth_example: ETH->WiFi: send packet failed: 12309, timeout=100, length=60
I (23774) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=60
I (23774) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=60
I (23784) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=60
I (23794) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=60
I (23794) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=86
I (23804) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=60
I (23814) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=191
I (23824) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=191
I (23824) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=86
I (23834) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=60
I (23844) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=86
I (23854) eth_example: ETH->WiFi: send packet ok: 0, timeout=2, length=750
...

Have anyone used the ESP32 as WiFi-AP and knows the challenges?

felmue

Hello @sheepDog

the eth2ap sample code runs fine on my M5Core2 w/o any modifications except adapting the GPIOs. Ping are fine and I can surf the Internet just fine from the wireless cleint.

Have you tried to change the channel the softAP is using? Maybe there is too much interference in your area?
Have you tried with a different wireless client?
How are you powering the M5Core2 and LAN module? Maybe there is a power issue?

Thanks
Felix

sheepDog

Hello Felix,

thank you for your quick answer. I can ping sometimes and I cann't surf the Internet with my phone or with my computer and eth2ap-modul.

I have changed the channel the softAP is using. Small changes in quality can be seen, but no significant improvement.
I tried a different wireless client, for example my computer and my phone.
I used a 12V/3A power adapter on LAN-Module with W5500. The M5Core2 and the LAN module also run stably with other applications and the same power supply.

Bye,
Uwe