参考
x 過去ログを見よ!!
x USBシリアルがかけるが気にするな!
x パケロスするが気にするな!!
x ブロードキャストがわかる人
x 積極的に書かなかったが、なぜか受信の割り込み関数でメモリを食う
処理ゃ時間の掛る処理をするとなぜかセグメントエラーで落ちる
転送データの形式(固定長)
-00.00,-00.00,-00.00[0x00]
ex
004.00,000.01,-09.80[0x00]
-09.80,000.03,000.10[0x00]
結果
プログラム
ホスト NanoC6 加速度センサー
//ESP32_NOW_m_ADXL345_M5NanoC6_1
//1対1に改造する 対応
//ブロードキャスト
//インクルド
//加速度センサー
#include <Arduino.h>
#include <Wire.h>
#include <Adafruit_Sensor.h>
#include <Adafruit_ADXL345_U.h>
//ESP-NOW
#include "ESP32_NOW.h"
#include "WiFi.h"
#include <esp_mac.h> // For the MAC2STR and MACSTR macros
//定義
//加速度センサー
/* Assign a unique ID to this sensor at the same time */
Adafruit_ADXL345_Unified accel = Adafruit_ADXL345_Unified(12345);
/* Definitions */
//WiFiチャンネルの指定
#define ESPNOW_WIFI_CHANNEL 1
//クラス
/* Classes */
// Creating a new class that inherits from the ESP_NOW_Peer class is required.
class ESP_NOW_Broadcast_Peer : public ESP_NOW_Peer {
public:
// Constructor of the class using the broadcast address
ESP_NOW_Broadcast_Peer(const uint8_t *mac_addr, uint8_t channel, wifi_interface_t iface, const uint8_t *lmk) : ESP_NOW_Peer(mac_addr, channel, iface, lmk) {}
// Destructor of the class
~ESP_NOW_Broadcast_Peer() {
remove();
}
// Function to properly initialize the ESP-NOW and register the broadcast peer
bool begin() {
if (!ESP_NOW.begin() || !add()) {
log_e("Failed to initialize ESP-NOW or register the broadcast peer");
return false;
}
return true;
}
// Function to send a message to all devices within the network
bool send_message(const uint8_t *data, size_t len) {
if (!send(data, len)) {
log_e("Failed to broadcast message");
return false;
}
return true;
}
};
/* Global Variables */
//ブロードキャスト オブジェクトの定義
// Create a broadcast peer object
ESP_NOW_Broadcast_Peer broadcast_peer(ESP_NOW.BROADCAST_ADDR, ESPNOW_WIFI_CHANNEL, WIFI_IF_STA, NULL);
//const MacAddress peer_mac({0x48, 0x27, 0xe2, 0xe3, 0xbd, 0x50});
//ESP_NOW_Broadcast_Peer broadcast_peer( peer_mac , ESPNOW_WIFI_CHANNEL, WIFI_IF_STA, NULL);
/* Main */
#define CP (uint8_t *)
//浮動小数点-12.34を文字列の"-12.34"に変換
void ch_conv(char *buf,float f){
int n; //変換元
int a; //一時変数
n = (int)(f * 100);
// 0123456
// -12.34_
buf[0]='0';
buf[3]='.';
buf[6]=0;
//符号を外す
if(n < 0) {n = 0 - n;buf[0]='-';}
a = (n * 52429) >> 19; // n / 10;
buf[5] = '0' + n - (a * 10);
n = a;
a = (n * 52429) >> 19; // n / 10;
buf[4] = '0' + n - (a * 10);
n = a;
a = (n * 52429) >> 19; // n / 10;
buf[2] = '0' + n - (a * 10);
n = a;
a = (n * 52429) >> 19; // n / 10;
buf[1] = '0' + n - (a * 10);
//n = a;
}//ch_conv
//初期化
void setup() {
//WiFiの初期化
// Initialize the Wi-Fi module
WiFi.mode(WIFI_STA);
WiFi.setChannel(ESPNOW_WIFI_CHANNEL);
delay(3000);//決め打ちなので、おかしかったら調整してね!
//ブロードキャストの初期化
// Register the broadcast peer
if (!broadcast_peer.begin()) {
delay(5000); //瞬リセット防止用
ESP.restart(); //リセット
}//endif
//テストメッセージを送る debug
// 012345678901234567890
char pp[]="000.00,000.00,-09.80";
delay(5);
broadcast_peer.send_message(CP(pp), 19+1);
delay(5);
broadcast_peer.send_message(CP(pp), 19+1);
delay(5);
broadcast_peer.send_message(CP(pp), 19+1);
delay(5);
/* Initialise the sensor */
if(!accel.begin()){ //失敗
/* There was a problem detecting the ADXL345 ... check your connections */
while(1){delay(1);};//無限ループ
}//endif
/* Set the range to whatever is appropriate for your project */
accel.setRange(ADXL345_RANGE_16_G);
}//setup
// 012345678901234567890
char hhh[] = "000.00,000.00,-09.80";
//メインループ
void loop() {
/* Get a new sensor event */
sensors_event_t event;
accel.getEvent(&event);
// メッセージの変換
ch_conv(&hhh[0],(float)(event.acceleration.x));
// メッセージの変換
ch_conv(&hhh[7],(float)(event.acceleration.y));
// メッセージの変換
ch_conv(&hhh[14],(float)(event.acceleration.z));
// 012345678901234567890
// "000.00,000.00,-09.80"
hhh[6] = ',';
hhh[13] = ',';
hhh[20] = 0;
broadcast_peer.send_message(CP(hhh), 19+1);delay(5);
delay(1000);
}//loop
スレーブ StampS3 シリアル出力
//ESP32_NOW_s_print_M5StampS3_1
//1対1に改造する 対応
//ブロードキャスト
/*
ESP-NOW Broadcast Slave
Lucas Saavedra Vaz - 2024
This sketch demonstrates how to receive broadcast messages from a master device using the ESP-NOW protocol.
The master device will broadcast a message every 5 seconds to all devices within the network.
The slave devices will receive the broadcasted messages. If they are not from a known master, they will be registered as a new master
using a callback function.
*/
//インクルド
#include <Arduino.h>
#include "ESP32_NOW.h"
#include "WiFi.h"
#include <esp_mac.h> // For the MAC2STR and MACSTR macros
#include <vector>
#include "MacAddress.h"
//定義
/* Definitions */
#define ESPNOW_WIFI_CHANNEL 1
//クラス
/* Classes */
// Creating a new class that inherits from the ESP_NOW_Peer class is required.
class ESP_NOW_Peer_Class : public ESP_NOW_Peer {
public:
// Constructor of the class
ESP_NOW_Peer_Class(const uint8_t *mac_addr, uint8_t channel, wifi_interface_t iface, const uint8_t *lmk) : ESP_NOW_Peer(mac_addr, channel, iface, lmk) {}
// Destructor of the class
~ESP_NOW_Peer_Class() {}
// Function to register the master peer
bool add_peer() {
if (!add()) {
log_e("Failed to register the broadcast peer");
return false;
}
return true;
}
// Function to print the received messages from the master
void onReceive(const uint8_t *data, size_t len, bool broadcast) {
Serial.printf("Received a message from master " MACSTR " (%s)\n", MAC2STR(addr()), broadcast ? "broadcast" : "unicast");
Serial.printf(" Message: %s\n", (char *)data);
}
};
/* Global Variables */
// List of all the masters. It will be populated when a new master is registered
std::vector<ESP_NOW_Peer_Class> masters;
/* Callbacks */
// Callback called when an unknown peer sends a message
void register_new_master(const esp_now_recv_info_t *info, const uint8_t *data, int len, void *arg) {
//自分
const MacAddress peer_mac1({0x48, 0x27, 0xe2, 0xe3, 0xbd, 0x50});
unsigned char a_add[6] ={0x48, 0x27, 0xe2, 0xe3, 0xbd, 0x50};
//相手
const MacAddress peer_mac2({0x40, 0x4c, 0xca, 0x5a, 0xe3, 0x1c});
if (memcmp(info->des_addr, ESP_NOW.BROADCAST_ADDR, 6) == 0) {
//if (memcmp(info->des_addr, a_add, 6) == 0) {
Serial.printf("Unknown peer " MACSTR " sent a broadcast message\n", MAC2STR(info->src_addr));
Serial.println("Registering the peer as a master");
ESP_NOW_Peer_Class new_master(info->src_addr, ESPNOW_WIFI_CHANNEL, WIFI_IF_STA, NULL);
masters.push_back(new_master);
if (!masters.back().add_peer()) {
Serial.println("Failed to register the new master");
return;
}
} else {
// The slave will only receive broadcast messages
log_v("Received a unicast message from " MACSTR, MAC2STR(info->src_addr));
log_v("Igorning the message");
}
}
/* Main */
//初期化
void setup() {
//WiFiの初期化
// Initialize the Wi-Fi module
WiFi.mode(WIFI_STA);
WiFi.setChannel(ESPNOW_WIFI_CHANNEL);
Serial.begin(115200); //シリアルポート
for(int i=0;i<9;i++){
Serial.print(".");
delay(500);//接続待ち
}//for
Serial.println();
while (!WiFi.STA.started()) {
delay(500);//接続待ち
}
//アドレスとWiFiチャンネルの表示
Serial.println("ESP-NOW Example - Broadcast Slave");
Serial.println("Wi-Fi parameters:");
Serial.println(" Mode: STA");
Serial.println(" MAC Address: " + WiFi.macAddress());
Serial.printf(" Channel: %d\n", ESPNOW_WIFI_CHANNEL);
//ブロードキャストの初期化
// Initialize the ESP-NOW protocol
if (!ESP_NOW.begin()) {
Serial.println("Failed to initialize ESP-NOW");
Serial.println("Reeboting in 5 seconds...");
delay(5000); //瞬リセット防止用
ESP.restart(); //リセット
}//endif
//ESP-NOWのコールバック
// Register the new peer callback
ESP_NOW.onNewPeer(register_new_master, NULL);
Serial.println("Setup complete. Waiting for a master to broadcast a message...");
}//setup
//メインループ
void loop() {
delay(300);//ダミー
}//loop