ESP-NOW project "Sending error"

Using Arduino Programming Questions
1 
#include <Arduino.h>
#include <TFT_eSPI.h>
#include "Wire.h"
#include <esp_now.h>
#include <WiFi.h>
#include <esp_wifi.h>

#define WIDTH  155
#define HEIGHT 180

esp_now_peer_info_t slave;
uint8_t  peer_addr[]= {0xC0, 0x49, 0xEF, 0xB4, 0x3F, 0xBC};//peer_addr目标MAC地址

#define CHANNEL 1

const int buttonUp = 13;
const int buttonDown = 12;
const int buttonLeft = 14;
const int buttonRight = 27;
const int buttonCenter = 26;
const int buttonSet = 25;
const int buttonRest = 33;

struct ControllerData {
String up;
String down;
String left;
String right;
String center;
String Set;
String Rest;
};


ControllerData controllerData;


esp_now_peer_info_t peerInfo;


TFT_eSPI tft = TFT_eSPI();
TFT_eSprite spr = TFT_eSprite(&tft); 

  
void OnDataSent(const uint8_t *mac_addr, esp_now_send_status_t status) {
  memcpy(slave.peer_addr, peer_addr, sizeof(slave.peer_addr));

  Serial.print("\r\nLast Packet Send Status:\t");
  Serial.println(status == ESP_NOW_SEND_SUCCESS ? "Delivery Success" : "Delivery Fail");
}

  

void setup() {
  Serial.begin(115200);
  Wire.begin();
  WiFi.mode(WIFI_STA);

  
  // Init ESP-NOW
  if (esp_now_init() != ESP_OK) 
  {
    Serial.println("Error initializing ESP-NOW");
    return;
  }
  else
  {
    Serial.println("Succes: Initialized ESP-NOW");
  }

  esp_now_register_send_cb(OnDataSent);
  
    // Register peer
  esp_now_peer_info_t peerInfo;
  memcpy(peerInfo.peer_addr, peer_addr, 6);
  peerInfo.channel = 0;  
  peerInfo.encrypt = false;
  peerInfo.ifidx=WIFI_IF_AP;
  
    // Add peer        
  if (esp_now_add_peer(&peerInfo) != ESP_OK)
  {
    Serial.println("Failed to add peer");
    return;
  }
  else
  {
    Serial.println("Succes: Added peer");
  } 
  
  pinMode(buttonUp, INPUT_PULLUP);
  pinMode(buttonDown, INPUT_PULLUP);
  pinMode(buttonLeft, INPUT_PULLUP);
  pinMode(buttonRight, INPUT_PULLUP);
  pinMode(buttonCenter, INPUT_PULLUP);
  pinMode(buttonSet, INPUT_PULLUP);
  pinMode(buttonRest, INPUT_PULLUP);
  
  tft.init();
  tft.setRotation(5);
  spr.createSprite(WIDTH,HEIGHT); 
  spr.fillScreen(TFT_BLACK);
  spr.setTextFont(2);
  spr.setTextSize(1);
  spr.setTextColor(TFT_GREEN);

}

void loop() {
  controllerData.up = digitalRead(buttonUp);
  controllerData.down = digitalRead(buttonDown);
  controllerData.left = digitalRead(buttonLeft);
  controllerData.right = digitalRead(buttonRight);
  controllerData.center = digitalRead(buttonCenter);
  controllerData.Set = digitalRead(buttonSet);
  controllerData.Rest = digitalRead(buttonRest);
 
  esp_err_t result = esp_now_send(peer_addr, (uint8_t *) &controllerData, sizeof(controllerData));
  if (result == ESP_OK) {
    Serial.println("Sending confirmed");
  }
  else {
    Serial.println("Sending error");
  }
 
  

  spr.fillScreen(TFT_BLACK);
  spr.setCursor(0, 0);
  

  if (digitalRead(buttonUp) == LOW) {
    spr.drawString("UP: Pressed", 0, 0);
  }else{
    spr.drawString("UP: Released", 0, 0);
  }

  if (digitalRead(buttonDown) == LOW) {
    spr.drawString("DOWN: Pressed", 0, 20);
  }else{
    spr.drawString("DOWN: Released", 0, 20);
  } 

  if (digitalRead(buttonLeft) == LOW) {
    spr.drawString("LEFT: Pressed", 0, 40);
  }else{
    spr.drawString("LEFT: Released", 0, 40);
  } 

  if ( digitalRead(buttonRight)== LOW) {
    spr.drawString("RIGHT: Pressed", 0, 60);
  }else{
    spr.drawString("RIGHT: Released", 0, 60);
  } 

  if (digitalRead(buttonCenter) == LOW) {
    spr.drawString("CENTER: Pressed", 0, 80);
  }else{
    spr.drawString("CENTER: Released", 0,80);
  } 

  if (digitalRead(buttonSet) == LOW){
    spr.drawString("SET: Pressed", 0, 100);
  }else{
    spr.drawString("SET: Released", 0, 100);
  } 
  
  if (digitalRead(buttonRest) == LOW){
    spr.drawString("REST: Pressed", 0, 120);
  }else{
    spr.drawString("REST: Released", 0, 120);
  } 
  

  spr.pushSprite(0, 0);

  
  delay(10);
}

load:0x40078000,len:13104
load:0x40080400,len:3036
entry 0x400805e4
Sending error
Sending error
Sending error

hi all,The serial port window displays "Sending error", I don’t know what’s going on, please help, thank you.

2

what does OnDataSent() indicate "Delivery Success" or "Delivery Fail"
upload a copy of the serial monitor output (as text not screen image)
are you sure you have the correct MAC address for the receiver?

3

upadated code completed.

4

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