I have a project that involves two ESP8266 and a NEO-6M GPS module. I want to send the GPS data to the other microcontroller using ESP-NOW, however it fails to send the data although it displays the coordinates. I just want to figure out how can I send the data through ESP-NOW. I have tried putting the two microcontrollers near each other, however, the status still displays as fail. The sender code is

#include <TinyGPS++.h>
#include <ESP8266WiFi.h>
#include <espnow.h>
#include <SoftwareSerial.h>

SoftwareSerial ss(5, 4); 
TinyGPSPlus gps;

int baud = 9600;
uint8_t receiverMAC[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};

typedef struct struct_message {
  float latitude;
  float longitude;
  float altitude;
} struct_message;

struct_message myData;

void setup() {
  Serial.begin(baud); 
  ss.begin(baud);  
  WiFi.mode(WIFI_STA);
  delay(100);
  if (esp_now_init() != 0) {
    Serial.println("ESP-NOW initialization failed!");
    while (true);
  }
  esp_now_set_self_role(ESP_NOW_ROLE_CONTROLLER);
  if (esp_now_add_peer(receiverMAC, ESP_NOW_ROLE_SLAVE, 1, NULL, 0) != 0) {
    Serial.println("Failed to add peer");
    return;
  }
}

void loop() {
  while (ss.available() > 0) {
    if (gps.encode(ss.read())) {
      if (gps.location.isValid()) {
        myData.latitude = gps.location.lat();
        myData.longitude = gps.location.lng();
        myData.altitude = gps.altitude.meters();
        displayInfo();
        sendData();
      }
    }
  }
    esp_now_register_send_cb(OnDataSent);
}

void OnDataSent(uint8_t * mac_addr, uint8_t sendStatus) {
  Serial.print("ESP-NOW Send Status: ");
  if (sendStatus == 0) {
    Serial.println("Delivery success");
  }
  else {
    Serial.println("Delivery fail");
  }
}

void displayInfo() {
  Serial.print("Latitude: ");
  Serial.println(myData.latitude, 6);
  Serial.print("Longitude: ");
  Serial.println(myData.longitude, 6);
  Serial.print("Altitude: ");
  Serial.println(myData.altitude, 2);
}

void sendData() {
  delay(100);
  uint8_t result = esp_now_send(receiverMAC, (uint8_t *) &myData, sizeof(myData));
  if (result != 0) {
    Serial.println("Error sending data");
  }
}

while the receiver code for the other microcontroller is shown below

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

typedef struct struct_message {
  float latitude;
  float longitude;
  float altitude;
} struct_message;

struct_message myData;

void OnDataRecv(uint8_t * mac, uint8_t *incomingData, uint8_t len) {
  Serial.println("Data received!");
  memcpy(&myData, incomingData, sizeof(myData));
  Serial.print("Latitude: ");
  Serial.println(myData.latitude, 6);
  Serial.print("Longitude: ");
  Serial.println(myData.longitude, 6);
  Serial.print("Altitude: ");
  Serial.println(myData.altitude, 2);
}

void setup() {
  Serial.begin(9600);
  WiFi.mode(WIFI_STA);
  if (esp_now_init() != 0) {
    Serial.println("Error initializing ESP-NOW");
    return;
  }
  esp_now_set_self_role(ESP_NOW_ROLE_SLAVE);
  esp_now_register_recv_cb(OnDataRecv);
}

void loop() {
}

I have a project that involves two ESP8266 and a NEO-6M GPS module. I want to send the GPS data to the other microcontroller using ESP-NOW, however it fails to send the data although it displays the coordinates. I just want to figure out how can I send the data through ESP-NOW. I have tried putting the two microcontrollers near each other, however, the status still displays as fail. The sender code is

#include <TinyGPS++.h>
#include <ESP8266WiFi.h>
#include <espnow.h>
#include <SoftwareSerial.h>

SoftwareSerial ss(5, 4); 
TinyGPSPlus gps;

int baud = 9600;
uint8_t receiverMAC[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};

typedef struct struct_message {
  float latitude;
  float longitude;
  float altitude;
} struct_message;

struct_message myData;

void setup() {
  Serial.begin(baud); 
  ss.begin(baud);  
  WiFi.mode(WIFI_STA);
  delay(100);
  if (esp_now_init() != 0) {
    Serial.println("ESP-NOW initialization failed!");
    while (true);
  }
  esp_now_set_self_role(ESP_NOW_ROLE_CONTROLLER);
  if (esp_now_add_peer(receiverMAC, ESP_NOW_ROLE_SLAVE, 1, NULL, 0) != 0) {
    Serial.println("Failed to add peer");
    return;
  }
}

void loop() {
  while (ss.available() > 0) {
    if (gps.encode(ss.read())) {
      if (gps.location.isValid()) {
        myData.latitude = gps.location.lat();
        myData.longitude = gps.location.lng();
        myData.altitude = gps.altitude.meters();
        displayInfo();
        sendData();
      }
    }
  }
    esp_now_register_send_cb(OnDataSent);
}

void OnDataSent(uint8_t * mac_addr, uint8_t sendStatus) {
  Serial.print("ESP-NOW Send Status: ");
  if (sendStatus == 0) {
    Serial.println("Delivery success");
  }
  else {
    Serial.println("Delivery fail");
  }
}

void displayInfo() {
  Serial.print("Latitude: ");
  Serial.println(myData.latitude, 6);
  Serial.print("Longitude: ");
  Serial.println(myData.longitude, 6);
  Serial.print("Altitude: ");
  Serial.println(myData.altitude, 2);
}

void sendData() {
  delay(100);
  uint8_t result = esp_now_send(receiverMAC, (uint8_t *) &myData, sizeof(myData));
  if (result != 0) {
    Serial.println("Error sending data");
  }
}

While the receiver code for the other microcontroller is shown below

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

typedef struct struct_message {
  float latitude;
  float longitude;
  float altitude;
} struct_message;

struct_message myData;

void OnDataRecv(uint8_t * mac, uint8_t *incomingData, uint8_t len) {
  Serial.println("Data received!");
  memcpy(&myData, incomingData, sizeof(myData));
  Serial.print("Latitude: ");
  Serial.println(myData.latitude, 6);
  Serial.print("Longitude: ");
  Serial.println(myData.longitude, 6);
  Serial.print("Altitude: ");
  Serial.println(myData.altitude, 2);
}

void setup() {
  Serial.begin(9600);
  WiFi.mode(WIFI_STA);
  if (esp_now_init() != 0) {
    Serial.println("Error initializing ESP-NOW");
    return;
  }
  esp_now_set_self_role(ESP_NOW_ROLE_SLAVE);
  esp_now_register_recv_cb(OnDataRecv);
}

void loop() {
}