From 2a6309caa6e50077c531adaa184eac2b7e6b978a Mon Sep 17 00:00:00 2001
From: Zhaoliang <zhz03@g.ucla.edu>
Date: Fri, 15 Oct 2021 02:38:19 -0700
Subject: [PATCH] master is able to send negative value
---
.../ESP32_master/ESP32_master.ino | 91 +++++++++++++++++++
1 file changed, 91 insertions(+)
create mode 100644 Code/ESP32_communication/test_more_variables/ESP32_master/ESP32_master.ino
diff --git a/Code/ESP32_communication/test_more_variables/ESP32_master/ESP32_master.ino b/Code/ESP32_communication/test_more_variables/ESP32_master/ESP32_master.ino
new file mode 100644
index 0000000..4cb442e
--- /dev/null
+++ b/Code/ESP32_communication/test_more_variables/ESP32_master/ESP32_master.ino
@@ -0,0 +1,91 @@
+//-----------------------------------------------------------
+//ESP-NOW: Transmitter
+//Ref: Random Nerd Tutorials https://randomnerdtutorials.com
+//-----------------------------------------------------------
+#include <esp_now.h>
+#include <WiFi.h>
+//-------------------------------------------------------------------------------------
+uint8_t RxMACaddress[] = {0xC4, 0xDD, 0x57, 0x9E, 0x91, 0x74};
+String strdata = "";
+String valdata = "";
+int count = 0;
+//-------------------------------------------------------------------------------------
+typedef struct TxStruct
+{
+ String StrD;
+ double ValD;
+}TxStruct;
+TxStruct sentData;
+//-------------------------------------------------------------------------------------
+void OnDataSent(const uint8_t *mac_addr, esp_now_send_status_t status) //callback function
+{
+ Serial.print("\r\nLast Packet Send Status:\t");
+ Serial.println(status == ESP_NOW_SEND_SUCCESS ? "Delivery Success" : "Delivery Fail");
+}
+//======================================================================================
+void setup()
+{
+ Serial.begin(9600);
+ WiFi.mode(WIFI_STA);
+ //------------------------------------------------------------------------------------
+ if(esp_now_init() != ESP_OK)
+ {
+ Serial.println("Error initializing ESP-NOW");
+ return;
+ }
+ //-------------------------------------------------------------------------------------
+ esp_now_register_send_cb(OnDataSent);
+ //-------------------------------------------------------------------------------------
+ esp_now_peer_info_t peerInfo;
+ memcpy(peerInfo.peer_addr, RxMACaddress, 6);
+ peerInfo.channel = 0;
+ peerInfo.encrypt = false;
+ //-------------------------------------------------------------------------------------
+ if(esp_now_add_peer(&peerInfo) != ESP_OK)
+ {
+ Serial.println("Failed to add peer");
+ return;
+ }
+}
+//======================================================================================
+void loop()
+{
+ while (Serial.available()>0){
+ int inChar = Serial.read();
+ /*
+ sentData.potVal = inChar - '0';
+ delay(10);
+ esp_now_send(RxMACaddress, (uint8_t *) &sentData, sizeof(sentData));
+ delay(500);
+ */
+ strdata += char(inChar);
+ delay(10);
+ count +=1;
+ if (count == 3){
+ sentData.StrD = strdata;
+ Serial.println(sentData.StrD);
+ }
+ if (isDigit(inChar) || inChar == '.' || inChar == '-'){
+ valdata += char(inChar);
+ }
+
+ if (inChar == '\n'){
+ sentData.ValD = valdata.toDouble();
+ Serial.println(sentData.ValD);
+ esp_err_t result = esp_now_send(RxMACaddress, (uint8_t *) &sentData, sizeof(sentData));
+ // esp_now_send(RxMACaddress, (uint8_t *) &sentData, sizeof(sentData));
+ //-------------------------------------------------------------------------------------
+ if (result == ESP_OK) Serial.println("Sent with success");
+ else Serial.println("Error sending the data");
+ //-------------------------------------------------------------------------------------
+ delay(500);
+ strdata = "";
+ valdata = "";
+ count = 0;
+ }
+
+ }
+
+ //-------------------------------------------------------------------------------------
+
+}
--
GitLab