From e8bb0a36f3ab8f48216388915ab9ca511a15513b Mon Sep 17 00:00:00 2001
From: Adema <h.adema@rug.nl>
Date: Wed, 19 Mar 2025 20:39:55 +0100
Subject: [PATCH] Upload files to "espnow_sender_code"

---
 espnow_sender_code/espnow_sender_code.ino | 61 +++++++++++++++++++++++
 1 file changed, 61 insertions(+)
 create mode 100644 espnow_sender_code/espnow_sender_code.ino

diff --git a/espnow_sender_code/espnow_sender_code.ino b/espnow_sender_code/espnow_sender_code.ino
new file mode 100644
index 0000000..fc425df
--- /dev/null
+++ b/espnow_sender_code/espnow_sender_code.ino
@@ -0,0 +1,61 @@
+#include <esp_now.h>
+#include <WiFi.h>
+
+// Structure to send data
+typedef struct struct_message {
+    int a0;
+    int a1;
+    int a2;
+} struct_message;
+
+// Create a struct_message instance
+struct_message myData;
+
+// Replace with your receiver's MAC Address
+uint8_t receiverMAC[] = {0x64, 0xe8, 0x33, 0x86, 0x41, 0xa8}; // Change XX to match receiver MAC
+
+// Callback function when data is sent
+void OnDataSent(const uint8_t *mac_addr, esp_now_send_status_t status) {
+    Serial.print("Send Status: ");
+    Serial.println(status == ESP_NOW_SEND_SUCCESS ? "Success" : "Fail");
+}
+
+void setup() {
+    Serial.begin(115200);
+    
+    // Set device as a Wi-Fi Station
+    WiFi.mode(WIFI_STA);
+
+    // Init ESP-NOW
+    if (esp_now_init() != ESP_OK) {
+        Serial.println("Error initializing ESP-NOW");
+        return;
+    }
+
+    // Register send callback
+    esp_now_register_send_cb(OnDataSent);
+
+    // Register peer
+    esp_now_peer_info_t peerInfo;
+    memcpy(peerInfo.peer_addr, receiverMAC, 6);
+    peerInfo.channel = 0;  
+    peerInfo.encrypt = false;
+
+    // Add peer
+    if (esp_now_add_peer(&peerInfo) != ESP_OK) {
+        Serial.println("Failed to add peer");
+        return;
+    }
+}
+
+void loop() {
+    // Read analog values from A0 to A2
+    myData.a0 = analogRead(A0);
+    myData.a1 = analogRead(A1);
+    myData.a2 = analogRead(A2);
+    
+    // Send data to receiver
+    esp_now_send(receiverMAC, (uint8_t *) &myData, sizeof(myData));
+    
+    //delay(1000);  // Send every second
+}