ESPNow stops working with wifi_promiscuous_enable(true)

[ripper121]

Platform

• Hardware: [ESP8266 device]
• Core Version: [latest git hash or date]
• Development Env: [Arduino IDE]
• Operating System: [Fedora latest]

Settings in IDE

• Module: [Generic ESP8266 Module]

Problem Description

With wifi_promiscuous_enable(true) the esp_now_register_recv_cb(OnDataRecv) callback is never reached. With the ESP32 this is no problem, only see this with the ESP8266

MCVE Sketch

#include <ESP8266WiFi.h>
#include <espnow.h>

bool myData = 0;
int32_t rssi = 0;

typedef struct {
  signed rssi: 8;
  unsigned rate: 4;
  unsigned is_group: 1;
  unsigned: 1;
  unsigned sig_mode: 2;
  unsigned legacy_length: 12;
  unsigned damatch0: 1;
  unsigned damatch1: 1;
  unsigned bssidmatch0: 1;
  unsigned bssidmatch1: 1;
  unsigned MCS: 7;
  unsigned CWB: 1;
  unsigned HT_length: 16;
  unsigned Smoothing: 1;
  unsigned Not_Sounding: 1;
  unsigned: 1;
  unsigned Aggregation: 1;
  unsigned STBC: 2;
  unsigned FEC_CODING: 1;
  unsigned SGI: 1;
  unsigned rxend_state: 8;
  unsigned ampdu_cnt: 8;
  unsigned channel: 4;
  unsigned: 12;
} wifi_pkt_rx_ctrl_t;

typedef struct {
  wifi_pkt_rx_ctrl_t rx_ctrl;
  uint8_t payload[0]; /* ieee80211 packet buff */
} wifi_promiscuous_pkt_t;

typedef struct {
  unsigned frame_ctrl: 16;
  unsigned duration_id: 16;
  uint8_t addr1[6]; /* receiver address */
  uint8_t addr2[6]; /* sender address */
  uint8_t addr3[6]; /* filtering address */
  unsigned sequence_ctrl: 16;
  uint8_t addr4[6]; /* optional */
} wifi_ieee80211_mac_hdr_t;

typedef struct {
  wifi_ieee80211_mac_hdr_t hdr;
  uint8_t payload[0]; /* network data ended with 4 bytes csum (CRC32) */
} wifi_ieee80211_packet_t;

void
promisc_cb(uint8_t *buff, uint16_t len)
{

  const wifi_promiscuous_pkt_t *ppkt = (wifi_promiscuous_pkt_t *)buff;
  const wifi_ieee80211_packet_t *ipkt = (wifi_ieee80211_packet_t *)ppkt->payload;
  const wifi_ieee80211_mac_hdr_t *hdr = &ipkt->hdr;
  rssi = (int32_t)ppkt->rx_ctrl.rssi;
}

// Callback function that will be executed when data is received
void OnDataRecv(uint8_t * mac, uint8_t *incomingData, uint8_t len) {
  memcpy(&myData, incomingData, sizeof(myData));
  Serial.print("Bytes received: ");
  Serial.println(len);
  Serial.print("Bool: ");
  Serial.println(myData);
  Serial.print("rssi: ");
  Serial.println(rssi);
  Serial.println();
}

void setup() {
  // Initialize Serial Monitor
  Serial.begin(115200);
  Serial.println("ESP-NOW");
  // Set device as a Wi-Fi Station
  WiFi.mode(WIFI_STA);

  // Init ESP-NOW
  if (esp_now_init() != 0) {
    Serial.println("Error initializing ESP-NOW");
    return;
  }

  // Once ESPNow is successfully Init, we will register for recv CB to
  // get recv packer info
  esp_now_set_self_role(ESP_NOW_ROLE_SLAVE);
  esp_now_register_recv_cb(OnDataRecv);

  wifi_promiscuous_enable(true); // enable promiscuous mode
  wifi_set_promiscuous_rx_cb(promisc_cb);
}


void loop() {
}

[Chris2B91]

I have exactly the same behaviour with a D1 mini. Reception of ESPNow messages is not working. But transmission of ESPNow messages from the ESP8266 is working, i.e. ESPNow is partially working. And I confirm also that there is no issue with ESP32. Have you been able to find a work around ?